update to gradle 8.7

.travis.yml

@@ -1,12 +0,0 @@
-language: java
-sudo: required
-jdk: 
-  - oraclejdk8
-cache: 
-  directories: 
-  - $HOME/.m2
-after_success: 
-  - ./gradlew sonarqube -Dsonar.host.url=https://sonarqube.com -Dsonar.login=$SONAR_TOKEN
-env: 
-  global: 
-    secure: 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

NOTICE.txt

@@ -7,6 +7,8 @@ org.xbib.time is based upon the following software:
 
 - prettytime https://github.com/ocpsoft/prettytime (Apache 2.0)
 
+- cron expression https://github.com/anderswisch/cron-expression/ (MIT License)
+
 with improvements by Jörg Prante including
 
 - converted to Java 8 java.time API
@@ -16,3 +18,5 @@ with improvements by Jörg Prante including
 - refactoring classes
 
 - rewritten code to simplify and ease development
+
+- added nextExecution() method to cron expression and scheduling via Callable

README.adoc

@@ -1,14 +0,0 @@
-# xbib Time
-
-image:https://api.travis-ci.org/xbib/time.svg[title="Build status", link="https://travis-ci.org/xbib/time/"]
-image:https://img.shields.io/sonar/http/nemo.sonarqube.com/org.xbib%3Atime/coverage.svg?style=flat-square[title="Coverage", link="https://sonarqube.com/dashboard/index?id=org.xbib%3Atime"]
-image:https://maven-badges.herokuapp.com/maven-central/org.xbib/time/badge.svg[title="Maven Central", link="http://search.maven.org/#search%7Cga%7C1%7Cxbib%20time"]
-image:https://img.shields.io/badge/License-Apache%202.0-blue.svg[title="Apache License 2.0", link="https://opensource.org/licenses/Apache-2.0"]
-
-This is a bundle of time utilities for Java 8 Time API. It consists of
-
-- Chronic: parsing natural language to compute time spans (from https://github.com/samtingleff/jchronic)
-- Pretty: pretty printing time durations (from https://github.com/ocpsoft/prettytime)
-- Format: format time descriptions (from https://github.com/JodaOrg/joda-time)
-
-This project has no dependencies.

README.md

@@ -0,0 +1,9 @@
+# xbib Time
+
+This is a bundle of time utilities for Java 8 Time API. It consists of
+
+- Chronic: parsing natural language to compute time spans (from https://github.com/samtingleff/jchronic)
+- Pretty: pretty printing time durations (from https://github.com/ocpsoft/prettytime)
+- Format: format time descriptions (from https://github.com/JodaOrg/joda-time)
+
+This project has no dependencies.

build.gradle

@@ -1,76 +1,40 @@
 plugins {
-    id "org.sonarqube" version "2.2"
+    id 'maven-publish'
-    id 'org.ajoberstar.github-pages' version '1.6.0-rc.1'
+    id 'signing'
-    id "org.xbib.gradle.plugin.jbake" version "1.2.1"
+    id "io.github.gradle-nexus.publish-plugin" version "2.0.0-rc-1"
+    id "org.xbib.gradle.plugin.asciidoctor" version "3.0.0"
 }
 
-printf "Host: %s\nOS: %s %s %s\nJVM: %s %s %s %s\nGroovy: %s\nGradle: %s\n" +
+wrapper {
-        "Build: group: ${project.group} name: ${project.name} version: ${project.version}\n",
+    gradleVersion = libs.versions.gradle.get()
-        InetAddress.getLocalHost(),
+    distributionType = Wrapper.DistributionType.BIN
-        System.getProperty("os.name"),
-        System.getProperty("os.arch"),
-        System.getProperty("os.version"),
-        System.getProperty("java.version"),
-        System.getProperty("java.vm.version"),
-        System.getProperty("java.vm.vendor"),
-        System.getProperty("java.vm.name"),
-        GroovySystem.getVersion(),
-        gradle.gradleVersion
-
-apply plugin: 'java'
-apply plugin: 'maven'
-apply plugin: 'signing'
-apply plugin: 'findbugs'
-apply plugin: 'pmd'
-apply plugin: 'checkstyle'
-apply plugin: "jacoco"
-apply plugin: 'org.ajoberstar.github-pages'
-
-configurations {
-    wagon
-    provided
-    testCompile.extendsFrom(provided)
 }
 
+ext {
+    user = 'joerg'
+    name = 'time'
+    description = 'A bundle of Chronic, Prettytime, and  org.joda.time.format optimized for Java 8 Time API'
+    inceptionYear = '2016'
+    url = 'https://xbib.org/' + user + '/' + name
+    scmUrl = 'https://xbib.org/' + user + '/' + name
+    scmConnection = 'scm:git:git://xbib.org/' + user + '/' + name + '.git'
+    scmDeveloperConnection = 'scm:git:ssh://forgejo@xbib.org:' + user + '/' + name + '.git'
+    issueManagementSystem = 'Github'
+    issueManagementUrl = ext.scmUrl + '/issues'
+    licenseName = 'The Apache License, Version 2.0'
+    licenseUrl = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+}
+
+apply from: rootProject.file('gradle/repositories/maven.gradle')
+apply from: rootProject.file('gradle/compile/java.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+apply from: rootProject.file('gradle/publish/maven.gradle')
+apply from: rootProject.file('gradle/publish/forgejo.gradle')
+apply from: rootProject.file('gradle/publish/sonatype.gradle')
+
 dependencies {
-    testCompile 'junit:junit:4.12'
+    testImplementation testLibs.quartz
-    testCompile 'org.apache.logging.log4j:log4j-core:2.7'
+    testImplementation testLibs.caliper
-    testCompile 'org.apache.logging.log4j:log4j-jul:2.7'
+    testImplementation testLibs.guava
-    wagon 'org.apache.maven.wagon:wagon-ssh-external:2.10'
 }
 
-sourceCompatibility = JavaVersion.VERSION_1_8
-targetCompatibility = JavaVersion.VERSION_1_8
-
-[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
-tasks.withType(JavaCompile) {
-    options.compilerArgs << "-Xlint:all" << "-profile" << "compact2"
-}
-
-test {
-    testLogging {
-        showStandardStreams = false
-        exceptionFormat = 'full'
-    }
-    systemProperty 'java.util.logging.manager', 'org.apache.logging.log4j.jul.LogManager'
-}
-
-task sourcesJar(type: Jar, dependsOn: classes) {
-    classifier 'sources'
-    from sourceSets.main.allSource
-}
-task javadocJar(type: Jar, dependsOn: javadoc) {
-    classifier 'javadoc'
-}
-artifacts {
-    archives sourcesJar, javadocJar
-}
-if (project.hasProperty('signing.keyId')) {
-    signing {
-        sign configurations.archives
-    }
-}
-
-apply from: 'gradle/ext.gradle'
-apply from: 'gradle/publish.gradle'
-apply from: 'gradle/sonarqube.gradle'

gradle.properties

@@ -1,3 +1,3 @@
 group = org.xbib
 name = time
-version = 1.0.0
+version = 4.0.0

gradle/compile/java.gradle

@@ -0,0 +1,29 @@
+
+apply plugin: 'java-library'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+    modularity.inferModulePath.set(true)
+    withSourcesJar()
+    withJavadocJar()
+}
+
+jar {
+    manifest {
+        attributes('Implementation-Version': project.version)
+    }
+}
+
+tasks.withType(JavaCompile) {
+    options.fork = true
+    options.forkOptions.jvmArgs += ['-Duser.language=en','-Duser.country=US']
+    options.compilerArgs << '-Xlint:all'
+    options.encoding = 'UTF-8'
+}
+
+javadoc {
+    options.addStringOption('Xdoclint:none', '-quiet')
+    options.encoding = 'UTF-8'
+}

gradle/documentation/asciidoc.gradle

@@ -0,0 +1,19 @@
+apply plugin: 'org.xbib.gradle.plugin.asciidoctor'
+
+asciidoctor {
+    backends 'html5'
+    outputDir = file("${rootProject.projectDir}/docs")
+    separateOutputDirs = false
+    attributes 'source-highlighter': 'coderay',
+            idprefix: '',
+            idseparator: '-',
+            toc: 'left',
+            doctype: 'book',
+            icons: 'font',
+            encoding: 'utf-8',
+            sectlink: true,
+            sectanchors: true,
+            linkattrs: true,
+            imagesdir: 'img',
+            stylesheet: "${projectDir}/src/docs/asciidoc/css/foundation.css"
+}

gradle/ext.gradle

@@ -1,8 +0,0 @@
-ext {
-    user = 'xbib'
-    projectName = 'time'
-    projectDescription = 'A bundle of Chronic, Prettytime, and  org.joda.time.format optimized for Java 8 Time API'
-    scmUrl = 'https://github.com/xbib/time'
-    scmConnection = 'scm:git:git://github.com/xbib/time.git'
-    scmDeveloperConnection = 'scm:git:git://github.com/xbib/time.git'
-}

gradle/ide/idea.gradle

@@ -0,0 +1,8 @@
+apply plugin: 'idea'
+
+idea {
+    module {
+        outputDir file('build/classes/java/main')
+        testOutputDir file('build/classes/java/test')
+    }
+}

gradle/publish.gradle

@@ -1,63 +0,0 @@
-
-task xbibUpload(type: Upload) {
-    configuration = configurations.archives
-    uploadDescriptor = true
-    repositories {
-        if (project.hasProperty('xbibUsername')) {
-            mavenDeployer {
-                configuration = configurations.wagon
-                repository(url: uri('scpexe://xbib.org/repository')) {
-                        authentication(userName: xbibUsername, privateKey: xbibPrivateKey)
-                }
-            }
-        }
-    }
-}
-
-task sonatypeUpload(type: Upload) {
-    configuration = configurations.archives
-    uploadDescriptor = true
-    repositories {
-        if (project.hasProperty('ossrhUsername')) {
-            mavenDeployer {
-                beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
-                repository(url: uri(ossrhReleaseUrl)) {
-                        authentication(userName: ossrhUsername, password: ossrhPassword)
-                }
-                snapshotRepository(url: uri(ossrhSnapshotUrl)) {
-                        authentication(userName: ossrhUsername, password: ossrhPassword)
-                }
-                pom.project {
-                    name projectName
-                    description projectDescription
-                    packaging 'jar'
-                    inceptionYear '2016'
-                    url scmUrl
-                    organization {
-                        name 'xbib'
-                        url 'http://xbib.org'
-                    }
-                    developers {
-                        developer {
-                            id user
-                            name 'Jörg Prante'
-                            email 'joergprante@gmail.com'
-                            url 'https://github.com/jprante'
-                        }
-                    }
-                    scm {
-                        url scmUrl
-                        connection scmConnection
-                        developerConnection scmDeveloperConnection
-                    }
-                    licenses {
-                        license {
-                            name 'The Apache License, Version 2.0'
-                            url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
-                        }
-                    }
-                }
-            }
-        }
-    }
-}

gradle/publish/forgejo.gradle

@@ -0,0 +1,16 @@
+if (project.hasProperty('forgeJoToken')) {
+    publishing {
+        repositories {
+            maven {
+                url 'https://xbib.org/api/packages/joerg/maven'
+                credentials(HttpHeaderCredentials) {
+                    name = "Authorization"
+                    value = "token ${project.property('forgeJoToken')}"
+                }
+                authentication {
+                    header(HttpHeaderAuthentication)
+                }
+            }
+        }
+    }
+}

gradle/publish/ivy.gradle

@@ -0,0 +1,27 @@
+apply plugin: 'ivy-publish'
+
+publishing {
+    repositories {
+        ivy {
+            url = "https://xbib.org/repo"
+        }
+    }
+    publications {
+        ivy(IvyPublication) {
+            from components.java
+            descriptor {
+                license {
+                    name = 'The Apache License, Version 2.0'
+                    url = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                }
+                author {
+                    name = 'Jörg Prante'
+                    url = 'https://xbib.org/joerg'
+                }
+                descriptor.description {
+                    text = rootProject.ext.description
+                }
+            }
+        }
+    }
+}

gradle/publish/maven.gradle

@@ -0,0 +1,51 @@
+
+publishing {
+    publications {
+        "${project.name}"(MavenPublication) {
+            from components.java
+            pom {
+                artifactId = project.name
+                name = project.name
+                description = rootProject.ext.description
+                url = rootProject.ext.url
+                inceptionYear = rootProject.ext.inceptionYear
+                packaging = 'jar'
+                organization {
+                    name = 'xbib'
+                    url = 'https://xbib.org'
+                }
+                developers {
+                    developer {
+                        id = 'joerg'
+                        name = 'Jörg Prante'
+                        email = 'joergprante@gmail.com'
+                        url = 'https://xbib.org/joerg'
+                    }
+                }
+                scm {
+                    url = rootProject.ext.scmUrl
+                    connection = rootProject.ext.scmConnection
+                    developerConnection = rootProject.ext.scmDeveloperConnection
+                }
+                issueManagement {
+                    system = rootProject.ext.issueManagementSystem
+                    url = rootProject.ext.issueManagementUrl
+                }
+                licenses {
+                    license {
+                        name = rootProject.ext.licenseName
+                        url = rootProject.ext.licenseUrl
+                        distribution = 'repo'
+                    }
+                }
+            }
+        }
+    }
+}
+
+if (project.hasProperty("signing.keyId")) {
+    apply plugin: 'signing'
+    signing {
+        sign publishing.publications."${project.name}"
+    }
+}

gradle/publish/sonatype.gradle

@@ -0,0 +1,11 @@
+if (project.hasProperty('ossrhUsername') && project.hasProperty('ossrhPassword')) {
+    nexusPublishing {
+        repositories {
+            sonatype {
+                username = project.property('ossrhUsername')
+                password = project.property('ossrhPassword')
+                packageGroup = "org.xbib"
+            }
+        }
+    }
+}

gradle/quality/checkstyle.gradle

@@ -0,0 +1,19 @@
+
+apply plugin: 'checkstyle'
+
+tasks.withType(Checkstyle) {
+    ignoreFailures = true
+    reports {
+        xml.getRequired().set(true)
+        html.getRequired().set(true)
+    }
+}
+
+checkstyle {
+    configFile = rootProject.file('gradle/quality/checkstyle.xml')
+    ignoreFailures = true
+    showViolations = true
+    checkstyleMain {
+        source = sourceSets.main.allSource
+    }
+}

gradle/quality/checkstyle.xml

@@ -9,6 +9,10 @@ page at http://checkstyle.sourceforge.net/config.html -->
 
 <module name="Checker">
 
+    <module name="BeforeExecutionExclusionFileFilter">
+        <property name="fileNamePattern" value=".*(Example|Test|module-info)(\$.*)?"/>
+    </module>
+
     <module name="FileTabCharacter">
         <!-- Checks that there are no tab characters in the file.
         -->
@@ -56,10 +60,19 @@ page at http://checkstyle.sourceforge.net/config.html -->
             <!-- Checks for out of order import statements. -->
 
             <property name="severity" value="warning"/>
-            <property name="groups" value="com,junit,net,org,java,javax"/>
+            <!-- <property name="tokens" value="IMPORT, STATIC_IMPORT"/> -->
-            <!-- This ensures that static imports go first. -->
+            <property name="separated" value="false"/>
-            <property name="option" value="top"/>
+            <property name="groups" value="*"/>
-            <property name="tokens" value="STATIC_IMPORT, IMPORT"/>
+            <!-- <property name="option" value="above"/> -->
+            <property name="sortStaticImportsAlphabetically" value="true"/>
+        </module>
+
+        <module name="CustomImportOrder">
+            <!-- <property name="customImportOrderRules" value="THIRD_PARTY_PACKAGE###SPECIAL_IMPORTS###STANDARD_JAVA_PACKAGE###STATIC"/> -->
+            <!-- <property name="specialImportsRegExp" value="^javax\."/> -->
+            <!-- <property name="standardPackageRegExp" value="^java\."/> -->
+            <property name="sortImportsInGroupAlphabetically" value="true"/>
+            <property name="separateLineBetweenGroups" value="false"/>
         </module>
 
         <!--
@@ -71,14 +84,10 @@ page at http://checkstyle.sourceforge.net/config.html -->
         <!-- Checks for Javadoc comments.                     -->
         <!-- See http://checkstyle.sf.net/config_javadoc.html -->
         <module name="JavadocMethod">
-            <property name="scope" value="protected"/>
+            <property name="accessModifiers" value="protected"/>
             <property name="severity" value="warning"/>
-            <property name="allowMissingJavadoc" value="true"/>
             <property name="allowMissingParamTags" value="true"/>
             <property name="allowMissingReturnTag" value="true"/>
-            <property name="allowMissingThrowsTags" value="true"/>
-            <property name="allowThrowsTagsForSubclasses" value="true"/>
-            <property name="allowUndeclaredRTE" value="true"/>
         </module>
 
         <module name="JavadocType">
@@ -184,21 +193,6 @@ page at http://checkstyle.sourceforge.net/config.html -->
 
         -->
 
-        <module name="LineLength">
-            <!-- Checks if a line is too long. -->
-            <property name="max" value="${com.puppycrawl.tools.checkstyle.checks.sizes.LineLength.max}" default="128"/>
-            <property name="severity" value="error"/>
-
-            <!--
-              The default ignore pattern exempts the following elements:
-                - import statements
-                - long URLs inside comments
-            -->
-
-            <property name="ignorePattern"
-                      value="${com.puppycrawl.tools.checkstyle.checks.sizes.LineLength.ignorePattern}"
-                      default="^(package .*;\s*)|(import .*;\s*)|( *(\*|//).*https?://.*)$"/>
-        </module>
 
         <module name="LeftCurly">
             <!-- Checks for placement of the left curly brace ('{'). -->
@@ -319,5 +313,21 @@ page at http://checkstyle.sourceforge.net/config.html -->
         </module>
 
     </module>
+
+    <module name="LineLength">
+        <!-- Checks if a line is too long. -->
+        <property name="max" value="${com.puppycrawl.tools.checkstyle.checks.sizes.LineLength.max}" default="128"/>
+        <property name="severity" value="error"/>
+
+        <!--
+          The default ignore pattern exempts the following elements:
+            - import statements
+            - long URLs inside comments
+        -->
+
+        <property name="ignorePattern"
+                  value="${com.puppycrawl.tools.checkstyle.checks.sizes.LineLength.ignorePattern}"
+                  default="^(package .*;\s*)|(import .*;\s*)|( *(\*|//).*https?://.*)$"/>
+    </module>
 </module>
 

gradle/quality/cyclonedx.gradle

@@ -0,0 +1,11 @@
+cyclonedxBom {
+    includeConfigs = [ 'runtimeClasspath' ]
+    skipConfigs = [ 'compileClasspath', 'testCompileClasspath' ]
+    projectType = "library"
+    schemaVersion = "1.4"
+    destination = file("build/reports")
+    outputName = "bom"
+    outputFormat = "json"
+    includeBomSerialNumber = true
+    componentVersion = "2.0.0"
+}

gradle/quality/pmd.gradle

@@ -0,0 +1,17 @@
+
+apply plugin: 'pmd'
+
+tasks.withType(Pmd) {
+    ignoreFailures = true
+    reports {
+        xml.getRequired().set(true)
+        html.getRequired().set(true)
+    }
+}
+
+pmd {
+    ignoreFailures = true
+    consoleOutput = false
+    toolVersion = "6.51.0"
+    ruleSetFiles = rootProject.files('gradle/quality/pmd/category/java/bestpractices.xml')
+}

gradle/quality/pmd/category/java/categories.properties

@@ -0,0 +1,10 @@
+
+rulesets.filenames=\
+    category/java/bestpractices.xml,\
+    category/java/codestyle.xml,\
+    category/java/design.xml,\
+    category/java/documentation.xml,\
+    category/java/errorprone.xml,\
+    category/java/multithreading.xml,\
+    category/java/performance.xml,\
+    category/java/security.xml

gradle/quality/pmd/category/java/documentation.xml

@@ -0,0 +1,144 @@
+<?xml version="1.0"?>
+
+<ruleset name="Documentation"
+         xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
+
+    <description>
+        Rules that are related to code documentation.
+    </description>
+
+    <rule name="CommentContent"
+          since="5.0"
+          message="Invalid words or phrases found"
+          class="net.sourceforge.pmd.lang.java.rule.documentation.CommentContentRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_documentation.html#commentcontent">
+        <description>
+            A rule for the politically correct... we don't want to offend anyone.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+//OMG, this is horrible, Bob is an idiot !!!
+]]>
+        </example>
+    </rule>
+
+    <rule name="CommentRequired"
+          since="5.1"
+          message="Comment is required"
+          class="net.sourceforge.pmd.lang.java.rule.documentation.CommentRequiredRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_documentation.html#commentrequired">
+        <description>
+            Denotes whether comments are required (or unwanted) for specific language elements.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+/**
+*
+*
+* @author Jon Doe
+*/
+]]>
+        </example>
+    </rule>
+
+    <rule name="CommentSize"
+          since="5.0"
+          message="Comment is too large"
+          class="net.sourceforge.pmd.lang.java.rule.documentation.CommentSizeRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_documentation.html#commentsize">
+        <description>
+            Determines whether the dimensions of non-header comments found are within the specified limits.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+/**
+*
+*   too many lines!
+*
+*
+*
+*
+*
+*
+*
+*
+*
+*
+*
+*
+*/
+]]>
+        </example>
+    </rule>
+
+    <rule name="UncommentedEmptyConstructor"
+          language="java"
+          since="3.4"
+          message="Document empty constructor"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          typeResolution="true"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_documentation.html#uncommentedemptyconstructor">
+        <description>
+            Uncommented Empty Constructor finds instances where a constructor does not
+            contain statements, but there is no comment. By explicitly commenting empty
+            constructors it is easier to distinguish between intentional (commented)
+            and unintentional empty constructors.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>
+                    <![CDATA[
+//ConstructorDeclaration[@Private='false']
+                        [count(BlockStatement) = 0 and ($ignoreExplicitConstructorInvocation = 'true' or not(ExplicitConstructorInvocation)) and @containsComment = 'false']
+                        [not(../Annotation/MarkerAnnotation/Name[pmd-java:typeIs('javax.inject.Inject')])]
+]]>
+                </value>
+            </property>
+            <property name="ignoreExplicitConstructorInvocation" type="Boolean" description="Ignore explicit constructor invocation when deciding whether constructor is empty or not" value="false"/>
+        </properties>
+        <example>
+            <![CDATA[
+public Foo() {
+  // This constructor is intentionally empty. Nothing special is needed here.
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="UncommentedEmptyMethodBody"
+          language="java"
+          since="3.4"
+          message="Document empty method body"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_documentation.html#uncommentedemptymethodbody">
+        <description>
+            Uncommented Empty Method Body finds instances where a method body does not contain
+            statements, but there is no comment. By explicitly commenting empty method bodies
+            it is easier to distinguish between intentional (commented) and unintentional
+            empty methods.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>
+                    <![CDATA[
+//MethodDeclaration/Block[count(BlockStatement) = 0 and @containsComment = 'false']
+]]>
+                </value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+public void doSomething() {
+}
+]]>
+        </example>
+    </rule>
+
+</ruleset>

gradle/quality/pmd/category/java/multithreading.xml

@@ -0,0 +1,393 @@
+<?xml version="1.0"?>
+
+<ruleset name="Multithreading"
+         xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
+
+    <description>
+        Rules that flag issues when dealing with multiple threads of execution.
+    </description>
+
+    <rule name="AvoidSynchronizedAtMethodLevel"
+          language="java"
+          since="3.0"
+          message="Use block level rather than method level synchronization"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#avoidsynchronizedatmethodlevel">
+        <description>
+            Method-level synchronization can cause problems when new code is added to the method.
+            Block-level synchronization helps to ensure that only the code that needs synchronization
+            gets it.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>//MethodDeclaration[@Synchronized='true']</value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+public class Foo {
+  // Try to avoid this:
+  synchronized void foo() {
+  }
+  // Prefer this:
+  void bar() {
+    synchronized(this) {
+    }
+  }
+
+  // Try to avoid this for static methods:
+  static synchronized void fooStatic() {
+  }
+
+  // Prefer this:
+  static void barStatic() {
+    synchronized(Foo.class) {
+    }
+  }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="AvoidThreadGroup"
+          language="java"
+          since="3.6"
+          message="Avoid using java.lang.ThreadGroup; it is not thread safe"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          typeResolution="true"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#avoidthreadgroup">
+        <description>
+            Avoid using java.lang.ThreadGroup; although it is intended to be used in a threaded environment
+            it contains methods that are not thread-safe.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>
+                    <![CDATA[
+//AllocationExpression/ClassOrInterfaceType[pmd-java:typeIs('java.lang.ThreadGroup')]|
+//PrimarySuffix[contains(@Image, 'getThreadGroup')]
+]]>
+                </value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+public class Bar {
+    void buz() {
+        ThreadGroup tg = new ThreadGroup("My threadgroup");
+        tg = new ThreadGroup(tg, "my thread group");
+        tg = Thread.currentThread().getThreadGroup();
+        tg = System.getSecurityManager().getThreadGroup();
+    }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="AvoidUsingVolatile"
+          language="java"
+          since="4.1"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          message="Use of modifier volatile is not recommended."
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#avoidusingvolatile">
+        <description>
+            Use of the keyword 'volatile' is generally used to fine tune a Java application, and therefore, requires
+            a good expertise of the Java Memory Model. Moreover, its range of action is somewhat misknown. Therefore,
+            the volatile keyword should not be used for maintenance purpose and portability.
+        </description>
+        <priority>2</priority>
+        <properties>
+            <property name="xpath">
+                <value>//FieldDeclaration[contains(@Volatile,'true')]</value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+public class ThrDeux {
+  private volatile String var1; // not suggested
+  private          String var2; // preferred
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="DoNotUseThreads"
+          language="java"
+          since="4.1"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          message="To be compliant to J2EE, a webapp should not use any thread."
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#donotusethreads">
+        <description>
+            The J2EE specification explicitly forbids the use of threads.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>//ClassOrInterfaceType[@Image = 'Thread' or @Image = 'Runnable']</value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+// This is not allowed
+public class UsingThread extends Thread {
+
+}
+
+// Neither this,
+public class OtherThread implements Runnable {
+    // Nor this ...
+    public void methode() {
+        Runnable thread = new Thread(); thread.run();
+    }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="DontCallThreadRun"
+          language="java"
+          since="4.3"
+          message="Don't call Thread.run() explicitly, use Thread.start()"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          typeResolution="true"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#dontcallthreadrun">
+        <description>
+            Explicitly calling Thread.run() method will execute in the caller's thread of control.  Instead, call Thread.start() for the intended behavior.
+        </description>
+        <priority>4</priority>
+        <properties>
+            <property name="xpath">
+                <value>
+                    <![CDATA[
+//StatementExpression/PrimaryExpression
+[
+    PrimaryPrefix
+    [
+        ./Name[ends-with(@Image, '.run') or @Image = 'run']
+        and substring-before(Name/@Image, '.') =//VariableDeclarator/VariableDeclaratorId/@Image
+            [../../../Type/ReferenceType/ClassOrInterfaceType[pmd-java:typeIs('java.lang.Thread')]]
+        or (./AllocationExpression/ClassOrInterfaceType[pmd-java:typeIs('java.lang.Thread')]
+        and ../PrimarySuffix[@Image = 'run'])
+    ]
+]
+]]>
+                </value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+Thread t = new Thread();
+t.run();            // use t.start() instead
+new Thread().run(); // same violation
+]]>
+        </example>
+    </rule>
+
+    <rule name="DoubleCheckedLocking"
+          language="java"
+          since="1.04"
+          message="Double checked locking is not thread safe in Java."
+          class="net.sourceforge.pmd.lang.java.rule.multithreading.DoubleCheckedLockingRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#doublecheckedlocking">
+        <description>
+            Partially created objects can be returned by the Double Checked Locking pattern when used in Java.
+            An optimizing JRE may assign a reference to the baz variable before it calls the constructor of the object the
+            reference points to.
+
+            Note: With Java 5, you can make Double checked locking work, if you declare the variable to be `volatile`.
+
+            For more details refer to: &lt;http://www.javaworld.com/javaworld/jw-02-2001/jw-0209-double.html>
+            or &lt;http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html>
+        </description>
+        <priority>1</priority>
+        <example>
+            <![CDATA[
+public class Foo {
+    /*volatile */ Object baz = null; // fix for Java5 and later: volatile
+    Object bar() {
+        if (baz == null) { // baz may be non-null yet not fully created
+            synchronized(this) {
+                if (baz == null) {
+                    baz = new Object();
+                }
+              }
+        }
+        return baz;
+    }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="NonThreadSafeSingleton"
+          since="3.4"
+          message="Singleton is not thread safe"
+          class="net.sourceforge.pmd.lang.java.rule.multithreading.NonThreadSafeSingletonRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#nonthreadsafesingleton">
+        <description>
+            Non-thread safe singletons can result in bad state changes. Eliminate
+            static singletons if possible by instantiating the object directly. Static
+            singletons are usually not needed as only a single instance exists anyway.
+            Other possible fixes are to synchronize the entire method or to use an
+            [initialize-on-demand holder class](https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom).
+
+            Refrain from using the double-checked locking pattern. The Java Memory Model doesn't
+            guarantee it to work unless the variable is declared as `volatile`, adding an uneeded
+            performance penalty. [Reference](http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html)
+
+            See Effective Java, item 48.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+private static Foo foo = null;
+
+//multiple simultaneous callers may see partially initialized objects
+public static Foo getFoo() {
+    if (foo==null) {
+        foo = new Foo();
+    }
+    return foo;
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="UnsynchronizedStaticDateFormatter"
+          since="3.6"
+          deprecated="true"
+          message="Static DateFormatter objects should be accessed in a synchronized manner"
+          class="net.sourceforge.pmd.lang.java.rule.multithreading.UnsynchronizedStaticDateFormatterRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#unsynchronizedstaticdateformatter">
+        <description>
+            SimpleDateFormat instances are not synchronized. Sun recommends using separate format instances
+            for each thread. If multiple threads must access a static formatter, the formatter must be
+            synchronized either on method or block level.
+
+            This rule has been deprecated in favor of the rule {% rule UnsynchronizedStaticFormatter %}.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+public class Foo {
+    private static final SimpleDateFormat sdf = new SimpleDateFormat();
+    void bar() {
+        sdf.format(); // poor, no thread-safety
+    }
+    synchronized void foo() {
+        sdf.format(); // preferred
+    }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="UnsynchronizedStaticFormatter"
+          since="6.11.0"
+          message="Static Formatter objects should be accessed in a synchronized manner"
+          class="net.sourceforge.pmd.lang.java.rule.multithreading.UnsynchronizedStaticFormatterRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#unsynchronizedstaticformatter">
+        <description>
+            Instances of `java.text.Format` are generally not synchronized.
+            Sun recommends using separate format instances for each thread.
+            If multiple threads must access a static formatter, the formatter must be
+            synchronized either on method or block level.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+public class Foo {
+    private static final SimpleDateFormat sdf = new SimpleDateFormat();
+    void bar() {
+        sdf.format(); // poor, no thread-safety
+    }
+    synchronized void foo() {
+        sdf.format(); // preferred
+    }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="UseConcurrentHashMap"
+          language="java"
+          minimumLanguageVersion="1.5"
+          since="4.2.6"
+          message="If you run in Java5 or newer and have concurrent access, you should use the ConcurrentHashMap implementation"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#useconcurrenthashmap">
+        <description>
+            Since Java5 brought a new implementation of the Map designed for multi-threaded access, you can
+            perform efficient map reads without blocking other threads.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>
+                    <![CDATA[
+//Type[../VariableDeclarator/VariableInitializer//AllocationExpression/ClassOrInterfaceType[@Image != 'ConcurrentHashMap']]
+/ReferenceType/ClassOrInterfaceType[@Image = 'Map']
+]]>
+                </value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+public class ConcurrentApp {
+  public void getMyInstance() {
+    Map map1 = new HashMap();           // fine for single-threaded access
+    Map map2 = new ConcurrentHashMap(); // preferred for use with multiple threads
+
+    // the following case will be ignored by this rule
+    Map map3 = someModule.methodThatReturnMap(); // might be OK, if the returned map is already thread-safe
+  }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="UseNotifyAllInsteadOfNotify"
+          language="java"
+          since="3.0"
+          message="Call Thread.notifyAll() rather than Thread.notify()"
+          class="net.sourceforge.pmd.lang.rule.XPathRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_multithreading.html#usenotifyallinsteadofnotify">
+        <description>
+            Thread.notify() awakens a thread monitoring the object. If more than one thread is monitoring, then only
+            one is chosen.  The thread chosen is arbitrary; thus its usually safer to call notifyAll() instead.
+        </description>
+        <priority>3</priority>
+        <properties>
+            <property name="xpath">
+                <value>
+                    <![CDATA[
+//StatementExpression/PrimaryExpression
+[PrimarySuffix/Arguments[@ArgumentCount = '0']]
+[
+    PrimaryPrefix[
+        ./Name[@Image='notify' or ends-with(@Image,'.notify')]
+        or ../PrimarySuffix/@Image='notify'
+        or (./AllocationExpression and ../PrimarySuffix[@Image='notify'])
+    ]
+]
+]]>
+                </value>
+            </property>
+        </properties>
+        <example>
+            <![CDATA[
+  void bar() {
+    x.notify();
+    // If many threads are monitoring x, only one (and you won't know which) will be notified.
+    // use instead:
+    x.notifyAll();
+  }
+]]>
+        </example>
+    </rule>
+
+</ruleset>

gradle/quality/pmd/category/java/security.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0"?>
+
+<ruleset name="Security" xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
+
+    <description>
+        Rules that flag potential security flaws.
+    </description>
+
+    <rule name="HardCodedCryptoKey"
+          since="6.4.0"
+          message="Do not use hard coded encryption keys"
+          class="net.sourceforge.pmd.lang.java.rule.security.HardCodedCryptoKeyRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_security.html#hardcodedcryptokey">
+        <description>
+            Do not use hard coded values for cryptographic operations. Please store keys outside of source code.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+public class Foo {
+    void good() {
+        SecretKeySpec secretKeySpec = new SecretKeySpec(Properties.getKey(), "AES");
+    }
+
+    void bad() {
+        SecretKeySpec secretKeySpec = new SecretKeySpec("my secret here".getBytes(), "AES");
+    }
+}
+]]>
+        </example>
+    </rule>
+
+    <rule name="InsecureCryptoIv"
+          since="6.3.0"
+          message="Do not use hard coded initialization vector in crypto operations"
+          class="net.sourceforge.pmd.lang.java.rule.security.InsecureCryptoIvRule"
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_security.html#insecurecryptoiv">
+        <description>
+            Do not use hard coded initialization vector in cryptographic operations. Please use a randomly generated IV.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+public class Foo {
+    void good() {
+        SecureRandom random = new SecureRandom();
+        byte iv[] = new byte[16];
+        random.nextBytes(bytes);
+    }
+
+    void bad() {
+        byte[] iv = new byte[] { 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, };
+    }
+
+    void alsoBad() {
+        byte[] iv = "secret iv in here".getBytes();
+    }
+}
+]]>
+        </example>
+    </rule>
+
+</ruleset>

gradle/quality/sonarqube.gradle

@@ -0,0 +1,37 @@
+
+subprojects {
+
+    sonarqube {
+        properties {
+            property "sonar.projectName", "${project.group} ${project.name}"
+            property "sonar.sourceEncoding", "UTF-8"
+            property "sonar.tests", "src/test/java"
+            property "sonar.scm.provider", "git"
+            property "sonar.junit.reportsPath", "build/test-results/test/"
+        }
+    }
+
+
+    tasks.withType(Pmd) {
+        ignoreFailures = true
+        reports {
+            xml.enabled = true
+            html.enabled = true
+        }
+    }
+
+
+    spotbugs {
+        effort = "max"
+        reportLevel = "low"
+        //includeFilter = file("findbugs-exclude.xml")
+    }
+
+    tasks.withType(com.github.spotbugs.SpotBugsTask) {
+        ignoreFailures = true
+        reports {
+            xml.enabled = false
+            html.enabled = true
+        }
+    }
+}

gradle/quality/spotbugs.gradle

@@ -0,0 +1,15 @@
+
+apply plugin: 'com.github.spotbugs'
+
+spotbugs {
+    effort = "max"
+    reportLevel = "low"
+    ignoreFailures = true
+}
+
+spotbugsMain {
+    reports {
+        xml.getRequired().set(false)
+        html.getRequired().set(true)
+    }
+}

gradle/repositories/maven.gradle

@@ -0,0 +1,4 @@
+repositories {
+    mavenLocal()
+    mavenCentral()
+}

gradle/sonarqube.gradle

@@ -1,36 +0,0 @@
-tasks.withType(FindBugs) {
-    ignoreFailures = true
-    reports {
-        xml.enabled = true
-    }
-}
-tasks.withType(Pmd) {
-    ignoreFailures = true
-    reports {
-        xml.enabled = true
-    }
-}
-tasks.withType(Checkstyle) {
-    ignoreFailures = true
-    reports {
-        xml.enabled = true
-    }
-}
-
-jacocoTestReport {
-    reports {
-        xml.enabled true
-        xml.destination "${buildDir}/reports/jacoco-xml"
-    }
-}
-
-sonarqube {
-    properties {
-        property "sonar.projectName", "${project.group} ${project.name}"
-        property "sonar.sourceEncoding", "UTF-8"
-        property "sonar.tests", "src/test/java"
-        property "sonar.scm.provider", "git"
-        property "sonar.java.coveragePlugin", "jacoco"
-        property "sonar.junit.reportsPath", "build/test-results/test/"
-    }
-}

gradle/test/junit5.gradle

@@ -0,0 +1,36 @@
+dependencies {
+    testImplementation testLibs.junit.jupiter.api
+    testImplementation testLibs.junit.jupiter.params
+    testImplementation testLibs.hamcrest
+    testRuntimeOnly testLibs.junit.jupiter.engine
+    testRuntimeOnly testLibs.junit.jupiter.platform.launcher
+}
+
+test {
+    useJUnitPlatform()
+    failFast = true
+    testLogging {
+        events 'STARTED', 'PASSED', 'FAILED', 'SKIPPED'
+    }
+    afterSuite { desc, result ->
+        if (!desc.parent) {
+            println "\nTest result: ${result.resultType}"
+            println "Test summary: ${result.testCount} tests, " +
+                    "${result.successfulTestCount} succeeded, " +
+                    "${result.failedTestCount} failed, " +
+                    "${result.skippedTestCount} skipped"
+        }
+    }
+    // for Guava using reflection on JDK classes which JDK17 does not like
+    jvmArgs '--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED',
+            '--add-exports=java.base/jdk.internal.ref=ALL-UNNAMED',
+            '--add-exports=java.base/sun.nio.ch=ALL-UNNAMED',
+            '--add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED',
+            '--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED',
+            '--add-opens=jdk.compiler/com.sun.tools.javac=ALL-UNNAMED',
+            '--add-opens=java.base/java.lang=ALL-UNNAMED',
+            '--add-opens=java.base/java.lang.reflect=ALL-UNNAMED',
+            '--add-opens=java.base/java.io=ALL-UNNAMED',
+            '--add-opens=java.base/java.util=ALL-UNNAMED'
+
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
-#Wed Nov 30 14:21:32 CET 2016
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-all.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.2.1-all.zip

gradlew

@@ -1,78 +1,127 @@
-#!/usr/bin/env sh
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 
 ##############################################################################
-##
+#
-##  Gradle start up script for UN*X
+#   Gradle start up script for POSIX generated by Gradle.
-##
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
 ##############################################################################
 
 # Attempt to set APP_HOME
+
 # Resolve links: $0 may be a link
-PRG="$0"
+app_path=$0
-# Need this for relative symlinks.
+
-while [ -h "$PRG" ] ; do
+# Need this for daisy-chained symlinks.
-    ls=`ls -ld "$PRG"`
+while
-    link=`expr "$ls" : '.*-> \(.*\)$'`
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
-    if expr "$link" : '/.*' > /dev/null; then
+    [ -h "$app_path" ]
-        PRG="$link"
+do
-    else
+    ls=$( ls -ld "$app_path" )
-        PRG=`dirname "$PRG"`"/$link"
+    link=${ls#*' -> '}
-    fi
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
 
-APP_NAME="Gradle"
+# This is normally unused
-APP_BASE_NAME=`basename "$0"`
+# shellcheck disable=SC2034
-
+APP_BASE_NAME=${0##*/}
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-DEFAULT_JVM_OPTS=""
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
+MAX_FD=maximum
 
 warn () {
     echo "$*"
-}
+} >&2
 
 die () {
     echo
     echo "$*"
     echo
     exit 1
-}
+} >&2
 
 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "`uname`" in
+case "$( uname )" in                #(
-  CYGWIN* )
+  CYGWIN* )         cygwin=true  ;; #(
-    cygwin=true
+  Darwin* )         darwin=true  ;; #(
-    ;;
+  MSYS* | MINGW* )  msys=true    ;; #(
-  Darwin* )
+  NONSTOP* )        nonstop=true ;;
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
 esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
         # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
+        JAVACMD=$JAVA_HOME/jre/sh/java
     else
-        JAVACMD="$JAVA_HOME/bin/java"
+        JAVACMD=$JAVA_HOME/bin/java
     fi
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -81,92 +130,120 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
 else
-    JAVACMD="java"
+    JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
+fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
+    case $MAX_FD in #(
-    if [ $? -eq 0 ] ; then
+      max*)
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-            MAX_FD="$MAX_FD_LIMIT"
+        # shellcheck disable=SC2039,SC3045
-        fi
+        MAX_FD=$( ulimit -H -n ) ||
-        ulimit -n $MAX_FD
+            warn "Could not query maximum file descriptor limit"
-        if [ $? -ne 0 ] ; then
+    esac
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
+    case $MAX_FD in  #(
-        fi
+      '' | soft) :;; #(
-    else
+      *)
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-    fi
+        # shellcheck disable=SC2039,SC3045
-fi
+        ulimit -n "$MAX_FD" ||
-
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=$((i+1))
-    done
-    case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
-# Escape application args
+# Collect all arguments for the java command, stacking in reverse order:
-save ( ) {
+#   * args from the command line
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+#   * the main class name
-    echo " "
+#   * -classpath
-}
+#   * -D...appname settings
-APP_ARGS=$(save "$@")
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
 
-# Collect all arguments for the java command, following the shell quoting and substitution rules
+# For Cygwin or MSYS, switch paths to Windows format before running java
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+
-  cd "$(dirname "$0")"
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
 fi
 
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
 exec "$JAVACMD" "$@"

gradlew.bat

@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
@@ -10,24 +26,28 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -35,48 +55,36 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+set EXIT_CODE=%ERRORLEVEL%
-exit /b 1
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal

settings.gradle

@@ -1 +1,33 @@
-rootProject.name = name
+pluginManagement {
+    repositories {
+        mavenLocal()
+        mavenCentral {
+            metadataSources {
+                mavenPom()
+                artifact()
+                ignoreGradleMetadataRedirection()
+            }
+        }
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    versionCatalogs {
+        libs {
+            version('gradle', '8.7')
+        }
+        testLibs {
+            version('junit', '5.10.2')
+            library('junit-jupiter-api', 'org.junit.jupiter', 'junit-jupiter-api').versionRef('junit')
+            library('junit-jupiter-params', 'org.junit.jupiter', 'junit-jupiter-params').versionRef('junit')
+            library('junit-jupiter-engine', 'org.junit.jupiter', 'junit-jupiter-engine').versionRef('junit')
+            library('junit-jupiter-platform-launcher', 'org.junit.platform', 'junit-platform-launcher').version('1.10.0')
+            library('hamcrest', 'org.hamcrest', 'hamcrest-library').version('2.2')
+            library('junit4', 'junit', 'junit').version('4.13.2')
+            library('quartz', 'org.quartz-scheduler', 'quartz').version('2.3.2')
+            library('caliper',  'com.google.caliper', 'caliper').version('1.0-beta-3')
+            library('guava', 'com.google.guava', 'guava').version('32.1.3-jre')
+        }
+    }
+}

src/main/java/module-info.java

@@ -0,0 +1,12 @@
+module org.xbib.time {
+    exports org.xbib.time.chronic;
+    exports org.xbib.time.chronic.handlers;
+    exports org.xbib.time.chronic.numerizer;
+    exports org.xbib.time.chronic.repeaters;
+    exports org.xbib.time.chronic.tags;
+    exports org.xbib.time.format;
+    exports org.xbib.time.pretty;
+    exports org.xbib.time.pretty.i18n;
+    exports org.xbib.time.pretty.units;
+    exports org.xbib.time.schedule;
+}

src/main/java/org/xbib/time/chronic/Chronic.java

@@ -13,16 +13,12 @@ import org.xbib.time.chronic.tags.TimeZone;
 import java.text.ParseException;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  *
  */
 public class Chronic {
 
-    private static final Logger logger = Logger.getLogger(Chronic.class.getName());
-
     private Chronic() {
     }
 
@@ -33,39 +29,39 @@ public class Chronic {
     /**
      * Parses a string containing a natural language date or time. If the parser
      * can find a date or time, either a Time or Chronic::Span will be returned
-     * (depending on the value of <tt>:guess</tt>). If no date or time can be found,
+     * (depending on the value of {@code :guess}). If no date or time can be found,
      * +nil+ will be returned.
      * <p>
      * Options are:
      * <p>
-     * [<tt>:context</tt>]
+     * [{@code :context}]
-     * <tt>:past</tt> or <tt>:future</tt> (defaults to <tt>:future</tt>)
+     * {@code :past} or {@code :future} (defaults to {@code :future})
      * <p>
-     * If your string represents a birthday, you can set <tt>:context</tt> to <tt>:past</tt>
+     * If your string represents a birthday, you can set {@code :context} to {@code :past}
      * and if an ambiguous string is given, it will assume it is in the
-     * past. Specify <tt>:future</tt> or omit to set a future context.
+     * past. Specify {@code :future<} or omit to set a future context.
      * <p>
-     * [<tt>:now</tt>]
+     * [{@code :now}]
      * Time (defaults to Time.now)
      * <p>
-     * By setting <tt>:now</tt> to a Time, all computations will be based off
+     * By setting {@code :now} to a Time, all computations will be based off
      * of that time instead of Time.now
      * <p>
-     * [<tt>:guess</tt>]
+     * [{@code :guess<}]
      * +true+ or +false+ (defaults to +true+)
      * <p>
      * By default, the parser will guess a single point in time for the
      * given date or time. If you'd rather have the entire time span returned,
-     * set <tt>:guess</tt> to +false+ and a Chronic::Span will be returned.
+     * set {@code :guess} to +false+ and a Chronic::Span will be returned.
      * <p>
-     * [<tt>:ambiguous_time_range</tt>]
+     * [{@code :ambiguous_time_range}]
-     * Integer or <tt>:none</tt> (defaults to <tt>6</tt> (6am-6pm))
+     * Integer or {@code :none} (defaults to {@code 6} (6am-6pm))
      * <p>
      * If an Integer is given, ambiguous times (like 5:00) will be
      * assumed to be within the range of that time in the AM to that time
-     * in the PM. For example, if you set it to <tt>7</tt>, then the parser will
+     * in the PM. For example, if you set it to {@code 7}, then the parser will
      * look for the time between 7am and 7pm. In the case of 5:00, it would
-     * assume that means 5:00pm. If <tt>:none</tt> is given, no assumption
+     * assume that means 5:00pm. If {@code :none} is given, no assumption
      * will be made, and the first matching instance of that time will
      * be used.
      * @param text text
@@ -84,7 +80,6 @@ public class Chronic {
                 tokens = (List<Token>) optionScannerClass.getMethod("scan", List.class, Options.class)
                         .invoke(null, tokens, options);
             } catch (Exception e) {
-                logger.log(Level.FINE, e.getMessage(), e);
                 throw new ParseException("failed to scan tokens", 0);
             }
         }
@@ -100,7 +95,6 @@ public class Chronic {
                 tokens = (List<Token>) scannerClass.getMethod("scan", List.class, Options.class)
                         .invoke(null, tokens, options);
             } catch (Exception e) {
-                logger.log(Level.FINE, e.getMessage(), e);
                 throw new ParseException("failed to scan tokens", 0);
             }
         }

src/main/java/org/xbib/time/chronic/Options.java

@@ -1,6 +1,6 @@
 package org.xbib.time.chronic;
 
-import org.xbib.time.chronic.tags.Pointer;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
@@ -9,15 +9,21 @@ import java.time.ZonedDateTime;
  *
  */
 public class Options {
+
     private ZonedDateTime now;
+
     private ZoneId zoneId;
-    private Pointer.PointerType context;
+
+    private PointerType context;
+
     private boolean guess;
+
     private int ambiguousTimeRange;
+
     private boolean compatibilityMode;
 
     public Options() {
-        setContext(Pointer.PointerType.FUTURE);
+        setContext(PointerType.FUTURE);
         setNow(ZonedDateTime.now());
         setZoneId(ZoneId.of("GMT"));
         setGuess(true);
@@ -33,11 +39,11 @@ public class Options {
         return this;
     }
 
-    public Pointer.PointerType getContext() {
+    public PointerType getContext() {
         return context;
     }
 
-    public Options setContext(Pointer.PointerType context) {
+    public Options setContext(PointerType context) {
         this.context = context;
         return this;
     }

src/main/java/org/xbib/time/chronic/Range.java

@@ -4,8 +4,10 @@ package org.xbib.time.chronic;
  *
  */
 public class Range {
-    private Long begin;
+
-    private Long end;
+    private final Long begin;
+
+    private final Long end;
 
     public Range(long begin, long end) {
         this.begin = begin;

src/main/java/org/xbib/time/chronic/Tick.java

@@ -4,8 +4,10 @@ package org.xbib.time.chronic;
  *
  */
 public class Tick {
+
     private int time;
-    private boolean ambiguous;
+
+    private final boolean ambiguous;
 
     public Tick(int time, boolean ambiguous) {
         this.time = time;

src/main/java/org/xbib/time/chronic/Token.java

@@ -10,8 +10,10 @@ import java.util.List;
  *
  */
 public class Token {
-    private String word;
+
-    private List<Tag<?>> tags;
+    private final String word;
+
+    private final List<Tag<?>> tags;
 
     public Token(String word) {
         this.word = word;
@@ -35,13 +37,7 @@ public class Token {
      * @param tagClass tag class
      */
     public void untag(Class<?> tagClass) {
-        Iterator<Tag<?>> tagIter = tags.iterator();
+        tags.removeIf(tagClass::isInstance);
-        while (tagIter.hasNext()) {
-            Tag<?> tag = tagIter.next();
-            if (tagClass.isInstance(tag)) {
-                tagIter.remove();
-            }
-        }
     }
 
     /**
@@ -58,7 +54,6 @@ public class Token {
      * @param <T> type parameter
      * @return tag
      */
-    @SuppressWarnings("unchecked")
     public <T extends Tag<?>> T getTag(Class<T> tagClass) {
         List<T> matches = getTags(tagClass);
         T matchingTag = null;

src/main/java/org/xbib/time/chronic/handlers/Handler.java

@@ -3,6 +3,7 @@ package org.xbib.time.chronic.handlers;
 import org.xbib.time.chronic.Options;
 import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
+import org.xbib.time.chronic.repeaters.DayPortion;
 import org.xbib.time.chronic.repeaters.EnumRepeaterDayPortion;
 import org.xbib.time.chronic.repeaters.IntegerRepeaterDayPortion;
 import org.xbib.time.chronic.repeaters.Repeater;
@@ -14,7 +15,8 @@ import org.xbib.time.chronic.tags.Grabber;
 import org.xbib.time.chronic.tags.Ordinal;
 import org.xbib.time.chronic.tags.OrdinalDay;
 import org.xbib.time.chronic.tags.Pointer;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
+import org.xbib.time.chronic.tags.Relative;
 import org.xbib.time.chronic.tags.Scalar;
 import org.xbib.time.chronic.tags.ScalarDay;
 import org.xbib.time.chronic.tags.ScalarMonth;
@@ -202,7 +204,7 @@ public class Handler {
     }
 
     public static Span getAnchor(List<Token> tokens, Options options) {
-        Grabber grabber = new Grabber(Grabber.Relative.THIS);
+        Grabber grabber = new Grabber(Relative.THIS);
         PointerType pointer = PointerType.FUTURE;
 
         List<Repeater<?>> repeaters = getRepeaters(tokens);
@@ -219,16 +221,16 @@ public class Handler {
         head.setNow(options.getNow());
 
         Span outerSpan;
-        Grabber.Relative grabberType = grabber.getType();
+        Relative grabberType = grabber.getType();
-        if (grabberType == Grabber.Relative.LAST) {
+        if (grabberType == Relative.LAST) {
             outerSpan = head.nextSpan(PointerType.PAST);
-        } else if (grabberType == Grabber.Relative.THIS) {
+        } else if (grabberType == Relative.THIS) {
             if (!repeaters.isEmpty()) {
                 outerSpan = head.thisSpan(PointerType.NONE);
             } else {
                 outerSpan = head.thisSpan(options.getContext());
             }
-        } else if (grabberType == Grabber.Relative.NEXT) {
+        } else if (grabberType == Relative.NEXT) {
             outerSpan = head.nextSpan(PointerType.FUTURE);
         } else {
             throw new IllegalArgumentException("Invalid grabber type " + grabberType + ".");
@@ -296,14 +298,14 @@ public class Handler {
             Tag<RepeaterDayPortion<?>> t1Tag = t1.getTag(RepeaterDayPortion.class);
 
             Object t1TagType = t1Tag.getType();
-            if (RepeaterDayPortion.DayPortion.MORNING.equals(t1TagType)) {
+            if (DayPortion.MORNING.equals(t1TagType)) {
                 t1.untag(RepeaterDayPortion.class);
-                t1.tag(new EnumRepeaterDayPortion(RepeaterDayPortion.DayPortion.AM));
+                t1.tag(new EnumRepeaterDayPortion(DayPortion.AM));
-            } else if (RepeaterDayPortion.DayPortion.AFTERNOON.equals(t1TagType) ||
+            } else if (DayPortion.AFTERNOON.equals(t1TagType) ||
-                    RepeaterDayPortion.DayPortion.EVENING.equals(t1TagType) ||
+                    DayPortion.EVENING.equals(t1TagType) ||
-                    RepeaterDayPortion.DayPortion.NIGHT.equals(t1TagType)) {
+                    DayPortion.NIGHT.equals(t1TagType)) {
                 t1.untag(RepeaterDayPortion.class);
-                t1.tag(new EnumRepeaterDayPortion(RepeaterDayPortion.DayPortion.PM));
+                t1.tag(new EnumRepeaterDayPortion(DayPortion.PM));
             }
         }
 

src/main/java/org/xbib/time/chronic/handlers/HandlerPattern.java

@@ -4,7 +4,8 @@ package org.xbib.time.chronic.handlers;
  *
  */
 public class HandlerPattern {
-    private boolean optional;
+
+    private final boolean optional;
 
     public HandlerPattern(boolean optional) {
         this.optional = optional;

src/main/java/org/xbib/time/chronic/handlers/HandlerTypePattern.java

@@ -4,7 +4,8 @@ package org.xbib.time.chronic.handlers;
  *
  */
 public class HandlerTypePattern extends HandlerPattern {
-    private Handler.HandlerType type;
+
+    private final Handler.HandlerType type;
 
     public HandlerTypePattern(Handler.HandlerType type) {
         this(type, false);

src/main/java/org/xbib/time/chronic/handlers/IHandler.java

@@ -11,5 +11,6 @@ import java.util.List;
  */
 @FunctionalInterface
 public interface IHandler {
+
     Span handle(List<Token> tokens, Options options);
 }

src/main/java/org/xbib/time/chronic/handlers/ORGRHandler.java

@@ -16,5 +16,4 @@ public class ORGRHandler extends ORRHandler {
         Span outerSpan = Handler.getAnchor(tokens.subList(2, 4), options);
         return handle(tokens.subList(0, 2), outerSpan, options);
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/ORRHandler.java

@@ -5,7 +5,7 @@ import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
 import org.xbib.time.chronic.repeaters.Repeater;
 import org.xbib.time.chronic.tags.Ordinal;
-import org.xbib.time.chronic.tags.Pointer;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.temporal.ChronoUnit;
 import java.util.List;
@@ -21,7 +21,7 @@ public abstract class ORRHandler implements IHandler {
         Integer ordinalValue = tokens.get(0).getTag(Ordinal.class).getType();
         Span span = null;
         for (int i = 0; i < ordinalValue; i++) {
-            span = repeater.nextSpan(Pointer.PointerType.FUTURE);
+            span = repeater.nextSpan(PointerType.FUTURE);
             if (span.getBegin() > outerSpan.getEnd()) {
                 span = null;
                 break;

src/main/java/org/xbib/time/chronic/handlers/ORSRHandler.java

@@ -16,5 +16,4 @@ public class ORSRHandler extends ORRHandler {
         Span outerSpan = Handler.getAnchor(tokens.subList(3, 4), options);
         return handle(tokens.subList(0, 2), outerSpan, options);
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/RHandler.java

@@ -16,5 +16,4 @@ public class RHandler implements IHandler {
         List<Token> ddTokens = Handler.dealiasAndDisambiguateTimes(tokens, options);
         return Handler.getAnchor(ddTokens, options);
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/RdnRmnSdTTzSyHandler.java

@@ -9,16 +9,12 @@ import org.xbib.time.chronic.tags.ScalarYear;
 
 import java.time.ZonedDateTime;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  *
  */
 public class RdnRmnSdTTzSyHandler implements IHandler {
 
-    private static final Logger logger = Logger.getLogger(RdnRmnSdTTzSyHandler.class.getName());
-
     @Override
     public Span handle(List<Token> tokens, Options options) {
         int month = tokens.get(1).getTag(RepeaterMonthName.class).getType().ordinal();
@@ -30,7 +26,6 @@ public class RdnRmnSdTTzSyHandler implements IHandler {
             ZonedDateTime dayStart = ZonedDateTime.of(year, month, day, 0, 0, 0, 0, options.getZoneId());
             span = Handler.dayOrTime(dayStart, timeTokens, options);
         } catch (IllegalArgumentException e) {
-            logger.log(Level.FINE, e.getMessage(), e);
             span = null;
         }
         return span;

src/main/java/org/xbib/time/chronic/handlers/RmnSdSyHandler.java

@@ -9,16 +9,12 @@ import org.xbib.time.chronic.tags.ScalarYear;
 
 import java.time.ZonedDateTime;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  *
  */
 public class RmnSdSyHandler implements IHandler {
 
-    private static final Logger logger = Logger.getLogger(RmnSdSyHandler.class.getName());
-
     @Override
     public Span handle(List<Token> tokens, Options options) {
         int month = tokens.get(0).getTag(RepeaterMonthName.class).getType().ordinal();
@@ -30,10 +26,8 @@ public class RmnSdSyHandler implements IHandler {
             ZonedDateTime dayStart = ZonedDateTime.of(year, month, day, 0, 0, 0, 0, options.getZoneId());
             span = Handler.dayOrTime(dayStart, timeTokens, options);
         } catch (IllegalArgumentException e) {
-            logger.log(Level.FINE, e.getMessage(), e);
             span = null;
         }
         return span;
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/RmnSyHandler.java

@@ -9,16 +9,12 @@ import org.xbib.time.chronic.tags.ScalarYear;
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  *
  */
 public class RmnSyHandler implements IHandler {
 
-    private static final Logger logger = Logger.getLogger(RmnSyHandler.class.getName());
-
     @Override
     public Span handle(List<Token> tokens, Options options) {
         int month = tokens.get(0).getTag(RepeaterMonthName.class).getType().ordinal();
@@ -29,10 +25,8 @@ public class RmnSyHandler implements IHandler {
             ZonedDateTime end = start.plus(1, ChronoUnit.MONTHS);
             span = new Span(start, end);
         } catch (IllegalArgumentException e) {
-            logger.log(Level.FINE, e.getMessage(), e);
             span = null;
         }
         return span;
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/SRPAHandler.java

@@ -16,5 +16,4 @@ public class SRPAHandler extends SRPHandler {
         Span anchorSpan = Handler.getAnchor(tokens.subList(3, tokens.size()), options);
         return super.handle(tokens, anchorSpan, options);
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/SRPHandler.java

@@ -6,6 +6,7 @@ import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
 import org.xbib.time.chronic.repeaters.Repeater;
 import org.xbib.time.chronic.tags.Pointer;
+import org.xbib.time.chronic.tags.PointerType;
 import org.xbib.time.chronic.tags.Scalar;
 
 import java.text.ParseException;
@@ -19,7 +20,7 @@ public class SRPHandler implements IHandler {
     public Span handle(List<Token> tokens, Span span, Options options) {
         int distance = tokens.get(0).getTag(Scalar.class).getType();
         Repeater<?> repeater = tokens.get(1).getTag(Repeater.class);
-        Pointer.PointerType pointer = tokens.get(2).getTag(Pointer.class).getType();
+        PointerType pointer = tokens.get(2).getTag(Pointer.class).getType();
         return repeater.getOffset(span, distance, pointer);
     }
 

src/main/java/org/xbib/time/chronic/handlers/SdRmnSyHandler.java

@@ -21,5 +21,4 @@ public class SdRmnSyHandler extends RmnSdSyHandler {
         newTokens.addAll(tokens.subList(3, tokens.size()));
         return super.handle(newTokens, options);
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/SmSdHandler.java

@@ -23,5 +23,4 @@ public class SmSdHandler implements IHandler {
         ZonedDateTime end = start.plus(1, ChronoUnit.MONTHS);
         return new Span(start, end);
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/SmSdSyHandler.java

@@ -9,16 +9,12 @@ import org.xbib.time.chronic.tags.ScalarYear;
 
 import java.time.ZonedDateTime;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  *
  */
 public class SmSdSyHandler implements IHandler {
 
-    private static final Logger logger = Logger.getLogger(SmSdSyHandler.class.getName());
-
     @Override
     public Span handle(List<Token> tokens, Options options) {
         int month = tokens.get(0).getTag(ScalarMonth.class).getType();
@@ -30,10 +26,8 @@ public class SmSdSyHandler implements IHandler {
             ZonedDateTime dayStart = ZonedDateTime.of(year, month, day, 0, 0, 0, 0, options.getZoneId());
             span = Handler.dayOrTime(dayStart, timeTokens, options);
         } catch (IllegalArgumentException e) {
-            logger.log(Level.FINE, e.getMessage(), e);
             span = null;
         }
         return span;
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/SmSyHandler.java

@@ -9,16 +9,12 @@ import org.xbib.time.chronic.tags.ScalarYear;
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  *
  */
 public class SmSyHandler implements IHandler {
 
-    private static final Logger logger = Logger.getLogger(SmSyHandler.class.getName());
-
     @Override
     public Span handle(List<Token> tokens, Options options) {
         int month = tokens.get(0).getTag(ScalarMonth.class).getType();
@@ -29,10 +25,8 @@ public class SmSyHandler implements IHandler {
             ZonedDateTime end = start.plus(1, ChronoUnit.MONTHS);
             span = new Span(start, end);
         } catch (IllegalArgumentException e) {
-            logger.log(Level.FINE, e.getMessage(), e);
             span = null;
         }
         return span;
     }
-
 }

src/main/java/org/xbib/time/chronic/handlers/TagPattern.java

@@ -7,7 +7,8 @@ import org.xbib.time.chronic.tags.Tag;
  */
 @SuppressWarnings("rawtypes")
 public class TagPattern extends HandlerPattern {
-    private Class<? extends Tag> tagClass;
+
+    private final Class<? extends Tag> tagClass;
 
     public TagPattern(Class<? extends Tag> tagClass) {
         this(tagClass, false);

src/main/java/org/xbib/time/chronic/numerizer/Numerizer.java

@@ -48,7 +48,7 @@ public class Numerizer {
         directNums.add(new DirectNum("nine(\\W|$)", "9$1"));
         directNums.add(new DirectNum("ten", "10"));
         directNums.add(new DirectNum("\\ba\\b", "1"));
-        DIRECT_NUMS = directNums.toArray(new DirectNum[directNums.size()]);
+        DIRECT_NUMS = directNums.toArray(new DirectNum[0]);
 
         List<TenPrefix> tenPrefixes = new LinkedList<>();
         tenPrefixes.add(new TenPrefix("twenty", 20));
@@ -60,7 +60,7 @@ public class Numerizer {
         tenPrefixes.add(new TenPrefix("eighty", 80));
         tenPrefixes.add(new TenPrefix("ninety", 90));
         tenPrefixes.add(new TenPrefix("ninty", 90));
-        TEN_PREFIXES = tenPrefixes.toArray(new TenPrefix[tenPrefixes.size()]);
+        TEN_PREFIXES = tenPrefixes.toArray(new TenPrefix[0]);
 
         List<BigPrefix> bigPrefixes = new LinkedList<>();
         bigPrefixes.add(new BigPrefix("hundred", 100L));
@@ -68,7 +68,7 @@ public class Numerizer {
         bigPrefixes.add(new BigPrefix("million", 1000000L));
         bigPrefixes.add(new BigPrefix("billion", 1000000000L));
         bigPrefixes.add(new BigPrefix("trillion", 1000000000000L));
-        BIG_PREFIXES = bigPrefixes.toArray(new BigPrefix[bigPrefixes.size()]);
+        BIG_PREFIXES = bigPrefixes.toArray(new BigPrefix[0]);
     }
 
     public static String numerize(String str) {
@@ -81,7 +81,7 @@ public class Numerizer {
         for (Prefix tp : Numerizer.TEN_PREFIXES) {
             Matcher matcher = tp.getName().matcher(numerizedStr);
             if (matcher.find()) {
-                StringBuffer matcherBuffer = new StringBuffer();
+                StringBuilder matcherBuffer = new StringBuilder();
                 do {
                     if (matcher.group(1) == null) {
                         matcher.appendReplacement(matcherBuffer, String.valueOf(tp.getNumber()));
@@ -97,7 +97,7 @@ public class Numerizer {
         for (Prefix bp : Numerizer.BIG_PREFIXES) {
             Matcher matcher = bp.getName().matcher(numerizedStr);
             if (matcher.find()) {
-                StringBuffer matcherBuffer = new StringBuffer();
+                StringBuilder matcherBuffer = new StringBuilder();
                 do {
                     if (matcher.group(1) == null) {
                         matcher.appendReplacement(matcherBuffer, String.valueOf(bp.getNumber()));
@@ -113,7 +113,7 @@ public class Numerizer {
         }
         Matcher matcher = Numerizer.DEHAALFER.matcher(numerizedStr);
         if (matcher.find()) {
-            StringBuffer matcherBuffer = new StringBuffer();
+            StringBuilder matcherBuffer = new StringBuilder();
             do {
                 matcher.appendReplacement(matcherBuffer,
                         String.valueOf(Float.parseFloat(matcher.group(1).trim()) + 0.5f));
@@ -142,8 +142,10 @@ public class Numerizer {
      *
      */
     private static class DirectNum {
-        private Pattern name;
+
-        private String number;
+        private final Pattern name;
+
+        private final String number;
 
         DirectNum(String name, String number) {
             this.name = Pattern.compile(name, Pattern.CASE_INSENSITIVE);
@@ -163,8 +165,10 @@ public class Numerizer {
      *
      */
     static class Prefix {
-        private Pattern name;
+
-        private long number;
+        private final Pattern name;
+
+        private final long number;
 
         Prefix(Pattern name, long number) {
             this.name = name;

src/main/java/org/xbib/time/chronic/repeaters/DayName.java

@@ -0,0 +1,8 @@
+package org.xbib.time.chronic.repeaters;
+
+/**
+ *
+ */
+public enum DayName {
+    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY
+}

src/main/java/org/xbib/time/chronic/repeaters/DayPortion.java

@@ -0,0 +1,8 @@
+package org.xbib.time.chronic.repeaters;
+
+/**
+ *
+ */
+public enum DayPortion {
+    AM, PM, MORNING, AFTERNOON, EVENING, NIGHT
+}

src/main/java/org/xbib/time/chronic/repeaters/EnumRepeaterDayPortion.java

@@ -5,12 +5,18 @@ import org.xbib.time.chronic.Range;
 /**
  *
  */
-public class EnumRepeaterDayPortion extends RepeaterDayPortion<RepeaterDayPortion.DayPortion> {
+public class EnumRepeaterDayPortion extends RepeaterDayPortion<DayPortion> {
+
     private static final Range AM_RANGE = new Range(0, 12 * 60 * 60); // 12am-12pm
+
     private static final Range PM_RANGE = new Range(12 * 60 * 60, 24 * 60 * 60 - 1); // 12pm-12am
+
     private static final Range MORNING_RANGE = new Range(6 * 60 * 60, 12 * 60 * 60); // 6am-12pm
+
     private static final Range AFTERNOON_RANGE = new Range(13 * 60 * 60, 17 * 60 * 60); // 1pm-5pm
+
     private static final Range EVENING_RANGE = new Range(17 * 60 * 60, 20 * 60 * 60); // 5pm-8pm
+
     private static final Range NIGHT_RANGE = new Range(20 * 60 * 60, 24 * 60 * 60); // 8pm-12pm
 
     public EnumRepeaterDayPortion(DayPortion type) {

src/main/java/org/xbib/time/chronic/repeaters/IntegerRepeaterDayPortion.java

@@ -6,6 +6,7 @@ import org.xbib.time.chronic.Range;
  *
  */
 public class IntegerRepeaterDayPortion extends RepeaterDayPortion<Integer> {
+
     public IntegerRepeaterDayPortion(Integer type) {
         super(type);
     }

src/main/java/org/xbib/time/chronic/repeaters/MonthName.java

@@ -0,0 +1,9 @@
+package org.xbib.time.chronic.repeaters;
+
+/**
+ *
+ */
+public enum MonthName {
+    ZEROMONTH_DO_NOT_REMOVE,
+    JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER
+}

src/main/java/org/xbib/time/chronic/repeaters/Repeater.java

@@ -3,7 +3,7 @@ package org.xbib.time.chronic.repeaters;
 import org.xbib.time.chronic.Options;
 import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
-import org.xbib.time.chronic.tags.Pointer;
+import org.xbib.time.chronic.tags.PointerType;
 import org.xbib.time.chronic.tags.Tag;
 
 import java.util.List;
@@ -65,25 +65,25 @@ public abstract class Repeater<T> extends Tag<T> implements Comparable<Repeater<
      * @param pointer pointer
      * @return span
      */
-    public Span nextSpan(Pointer.PointerType pointer) {
+    public Span nextSpan(PointerType pointer) {
         if (getNow() == null) {
             throw new IllegalStateException("Start point must be set before calling #next");
         }
         return internalNextSpan(pointer);
     }
 
-    protected abstract Span internalNextSpan(Pointer.PointerType pointer);
+    protected abstract Span internalNextSpan(PointerType pointer);
 
-    public Span thisSpan(Pointer.PointerType pointer) {
+    public Span thisSpan(PointerType pointer) {
         if (getNow() == null) {
             throw new IllegalStateException("Start point must be set before calling #this");
         }
         return internalThisSpan(pointer);
     }
 
-    protected abstract Span internalThisSpan(Pointer.PointerType pointer);
+    protected abstract Span internalThisSpan(PointerType pointer);
 
-    public abstract Span getOffset(Span span, int amount, Pointer.PointerType pointer);
+    public abstract Span getOffset(Span span, int amount, PointerType pointer);
 
     @Override
     public int hashCode() {

src/main/java/org/xbib/time/chronic/repeaters/RepeaterDay.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;

src/main/java/org/xbib/time/chronic/repeaters/RepeaterDayName.java

@@ -2,7 +2,7 @@ package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoField;
@@ -14,18 +14,30 @@ import java.util.regex.Pattern;
 /**
  *
  */
-public class RepeaterDayName extends Repeater<RepeaterDayName.DayName> {
+public class RepeaterDayName extends Repeater<DayName> {
+
     private static final int DAY_SECONDS = 86400;
+
     private static final Pattern MON_PATTERN = Pattern.compile("^m[ou]n(day)?$");
+
     private static final Pattern TUE_PATTERN = Pattern.compile("^t(ue|eu|oo|u|)s(day)?$");
+
     private static final Pattern TUE_PATTERN_1 = Pattern.compile("^tue$");
+
     private static final Pattern WED_PATTERN_1 = Pattern.compile("^we(dnes|nds|nns)day$");
+
     private static final Pattern WED_PATTERN_2 = Pattern.compile("^wed$");
+
     private static final Pattern THU_PATTERN_1 = Pattern.compile("^th(urs|ers)day$");
+
     private static final Pattern THU_PATTERN_2 = Pattern.compile("^thu$");
+
     private static final Pattern FRI_PATTERN = Pattern.compile("^fr[iy](day)?$");
+
     private static final Pattern SAT_PATTERN = Pattern.compile("^sat(t?[ue]rday)?$");
+
     private static final Pattern SUN_PATTERN = Pattern.compile("^su[nm](day)?$");
+
     private ZonedDateTime currentDayStart;
 
     public RepeaterDayName(DayName type) {
@@ -106,10 +118,4 @@ public class RepeaterDayName extends Repeater<RepeaterDayName.DayName> {
         return super.toString() + "-dayname-" + getType();
     }
 
-    /**
-     *
-     */
-    public enum DayName {
-        MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY
-    }
 }

src/main/java/org/xbib/time/chronic/repeaters/RepeaterDayPortion.java

@@ -3,7 +3,7 @@ package org.xbib.time.chronic.repeaters;
 import org.xbib.time.chronic.Range;
 import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -18,14 +18,21 @@ import java.util.regex.Pattern;
 public abstract class RepeaterDayPortion<T> extends Repeater<T> {
 
     private static final Pattern AM_PATTERN = Pattern.compile("^ams?$");
+
     private static final Pattern PM_PATTERN = Pattern.compile("^pms?$");
+
     private static final Pattern MORNING_PATTERN = Pattern.compile("^mornings?$");
+
     private static final Pattern AFTERNOON_PATTERN = Pattern.compile("^afternoons?$");
+
     private static final Pattern EVENING_PATTERN = Pattern.compile("^evenings?$");
+
     private static final Pattern NIGHT_PATTERN = Pattern.compile("^(night|nite)s?$");
 
     private static final int FULL_DAY_SECONDS = 60 * 60 * 24;
-    private Range range;
+
+    private final Range range;
+
     private Span currentSpan;
 
     public RepeaterDayPortion(T type) {
@@ -149,10 +156,4 @@ public abstract class RepeaterDayPortion<T> extends Repeater<T> {
         return super.toString() + "-dayportion-" + getType();
     }
 
-    /**
-     *
-     */
-    public enum DayPortion {
-        AM, PM, MORNING, AFTERNOON, EVENING, NIGHT
-    }
 }

src/main/java/org/xbib/time/chronic/repeaters/RepeaterFortnight.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,6 +10,7 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterFortnight extends RepeaterUnit {
+
     public static final int FORTNIGHT_SECONDS = 1209600; // (14 * 24 * 60 * 60)
 
     private ZonedDateTime currentFortnightStart;
@@ -23,12 +24,12 @@ public class RepeaterFortnight extends RepeaterUnit {
     protected Span internalNextSpan(PointerType pointer) {
         if (currentFortnightStart == null) {
             if (pointer == PointerType.FUTURE) {
-                RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+                RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
                 sundayRepeater.setNow(getNow());
                 Span nextSundaySpan = sundayRepeater.nextSpan(PointerType.FUTURE);
                 currentFortnightStart = nextSundaySpan.getBeginCalendar();
             } else if (pointer == PointerType.PAST) {
-                RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+                RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
                 sundayRepeater.setNow(getNow().plus(RepeaterDay.DAY_SECONDS, ChronoUnit.SECONDS));
                 sundayRepeater.nextSpan(PointerType.PAST);
                 sundayRepeater.nextSpan(PointerType.PAST);
@@ -55,7 +56,7 @@ public class RepeaterFortnight extends RepeaterUnit {
         Span span;
         if (pointer == PointerType.FUTURE) {
             ZonedDateTime thisFortnightStart = ymdh(getNow()).plus(RepeaterHour.HOUR_SECONDS, ChronoUnit.SECONDS);
-            RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+            RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
             sundayRepeater.setNow(getNow());
             sundayRepeater.thisSpan(PointerType.FUTURE);
             Span thisSundaySpan = sundayRepeater.thisSpan(PointerType.FUTURE);
@@ -63,7 +64,7 @@ public class RepeaterFortnight extends RepeaterUnit {
             span = new Span(thisFortnightStart, thisFortnightEnd);
         } else if (pointer == PointerType.PAST) {
             ZonedDateTime thisFortnightEnd = ymdh(getNow());
-            RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+            RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
             sundayRepeater.setNow(getNow());
             Span lastSundaySpan = sundayRepeater.nextSpan(PointerType.PAST);
             ZonedDateTime thisFortnightStart = lastSundaySpan.getBeginCalendar();

src/main/java/org/xbib/time/chronic/repeaters/RepeaterHour.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,6 +10,7 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterHour extends RepeaterUnit {
+
     public static final int HOUR_SECONDS = 3600;
 
     private ZonedDateTime currentDayStart;

src/main/java/org/xbib/time/chronic/repeaters/RepeaterMinute.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,6 +10,7 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterMinute extends RepeaterUnit {
+
     public static final int MINUTE_SECONDS = 60;
 
     private ZonedDateTime currentMinuteStart;

src/main/java/org/xbib/time/chronic/repeaters/RepeaterMonth.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,6 +10,7 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterMonth extends RepeaterUnit {
+
     private static final int MONTH_SECONDS = 2592000; // 30 * 24 * 60 * 60
 
     private ZonedDateTime currentMonthStart;

src/main/java/org/xbib/time/chronic/repeaters/RepeaterMonthName.java

@@ -2,7 +2,7 @@ package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Token;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -13,21 +13,34 @@ import java.util.regex.Pattern;
 /**
  *
  */
-public class RepeaterMonthName extends Repeater<RepeaterMonthName.MonthName> {
+public class RepeaterMonthName extends Repeater<MonthName> {
+
     private static final Pattern JAN_PATTERN = Pattern.compile("^jan\\.?(uary)?$");
+
     private static final Pattern FEB_PATTERN = Pattern.compile("^feb\\.?(ruary)?$");
+
     private static final Pattern MAR_PATTERN = Pattern.compile("^mar\\.?(ch)?$");
+
     private static final Pattern APR_PATTERN = Pattern.compile("^apr\\.?(il)?$");
+
     private static final Pattern MAY_PATTERN = Pattern.compile("^may$");
+
     private static final Pattern JUN_PATTERN = Pattern.compile("^jun\\.?e?$");
+
     private static final Pattern JUL_PATTERN = Pattern.compile("^jul\\.?y?$");
+
     private static final Pattern AUG_PATTERN = Pattern.compile("^aug\\.?(ust)?$");
+
     private static final Pattern SEP_PATTERN = Pattern.compile("^sep\\.?(t\\.?|tember)?$");
+
     private static final Pattern OCT_PATTERN = Pattern.compile("^oct\\.?(ober)?$");
+
     private static final Pattern NOV_PATTERN = Pattern.compile("^nov\\.?(ember)?$");
+
     private static final Pattern DEC_PATTERN = Pattern.compile("^dec\\.?(ember)?$");
 
     private static final int MONTH_SECONDS = 2592000; // 30 * 24 * 60 * 60
+
     private ZonedDateTime currentMonthBegin;
 
     public RepeaterMonthName(MonthName type) {
@@ -146,12 +159,4 @@ public class RepeaterMonthName extends Repeater<RepeaterMonthName.MonthName> {
         return super.toString() + "-monthname-" + getType();
     }
 
-    /**
-     *
-     */
-    public enum MonthName {
-        ZEROMONTH_DO_NOT_REMOVE,
-        JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER
-    }
-
 }

src/main/java/org/xbib/time/chronic/repeaters/RepeaterSecond.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,6 +10,7 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterSecond extends RepeaterUnit {
+
     private static final int SECOND_SECONDS = 1;
 
     private ZonedDateTime secondStart;
@@ -22,7 +23,6 @@ public class RepeaterSecond extends RepeaterUnit {
         } else {
             secondStart = secondStart.plus(direction, ChronoUnit.SECONDS);
         }
-
         return new Span(secondStart, ChronoUnit.SECONDS, 1);
     }
 

src/main/java/org/xbib/time/chronic/repeaters/RepeaterTime.java

@@ -4,7 +4,7 @@ import org.xbib.time.chronic.Options;
 import org.xbib.time.chronic.Span;
 import org.xbib.time.chronic.Tick;
 import org.xbib.time.chronic.Token;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -16,13 +16,17 @@ import java.util.regex.Pattern;
  *
  */
 public class RepeaterTime extends Repeater<Tick> {
+
     private static final Pattern TIME_PATTERN = Pattern.compile("^\\d{1,2}(:?\\d{2})?([\\.:]?\\d{2})?$");
+
     private ZonedDateTime currentTime;
 
     public RepeaterTime(String time) {
         super(null);
         String t = time.replaceAll(":", "");
         Tick type;
+        boolean ambiguous = time.contains(":") && Integer.parseInt(t.substring(0, 1)) != 0 &&
+                Integer.parseInt(t.substring(0, 2)) <= 12;
         int length = t.length();
         if (length <= 2) {
             int hours = Integer.parseInt(t);
@@ -37,8 +41,6 @@ public class RepeaterTime extends Repeater<Tick> {
             int minutesInSeconds = Integer.parseInt(t.substring(1)) * 60;
             type = new Tick(hoursInSeconds + minutesInSeconds, true);
         } else if (length == 4) {
-            boolean ambiguous = time.contains(":") && Integer.parseInt(t.substring(0, 1)) != 0 &&
-                    Integer.parseInt(t.substring(0, 2)) <= 12;
             int hours = Integer.parseInt(t.substring(0, 2));
             int hoursInSeconds = hours * 60 * 60;
             int minutesInSeconds = Integer.parseInt(t.substring(2)) * 60;
@@ -53,8 +55,6 @@ public class RepeaterTime extends Repeater<Tick> {
             int seconds = Integer.parseInt(t.substring(3));
             type = new Tick(hoursInSeconds + minutesInSeconds + seconds, true);
         } else if (length == 6) {
-            boolean ambiguous = time.contains(":") && Integer.parseInt(t.substring(0, 1)) != 0 &&
-                    Integer.parseInt(t.substring(0, 2)) <= 12;
             int hours = Integer.parseInt(t.substring(0, 2));
             int hoursInSeconds = hours * 60 * 60;
             int minutesInSeconds = Integer.parseInt(t.substring(2, 4)) * 60;
@@ -84,29 +84,30 @@ public class RepeaterTime extends Repeater<Tick> {
     private static Integer integerValue(String str) {
         if (str != null) {
             String s = str.toLowerCase();
-            if ("one".equals(s)) {
+            switch (s) {
+                case "one":
                     return 1;
-            } else if ("two".equals(s)) {
+                case "two":
                     return 2;
-            } else if ("three".equals(s)) {
+                case "three":
                     return 3;
-            } else if ("four".equals(s)) {
+                case "four":
                     return 4;
-            } else if ("five".equals(s)) {
+                case "five":
                     return 5;
-            } else if ("six".equals(s)) {
+                case "six":
                     return 6;
-            } else if ("seven".equals(s)) {
+                case "seven":
                     return 7;
-            } else if ("eight".equals(s)) {
+                case "eight":
                     return 8;
-            } else if ("nine".equals(s)) {
+                case "nine":
                     return 9;
-            } else if ("ten".equals(s)) {
+                case "ten":
                     return 10;
-            } else if ("eleven".equals(s)) {
+                case "eleven":
                     return 11;
-            } else if ("twelve".equals(s)) {
+                case "twelve":
                     return 12;
             }
         }
@@ -158,8 +159,8 @@ public class RepeaterTime extends Repeater<Tick> {
                     }
                 }
             } else {
-                if (tick.isAmbiguous()) {
                 List<ZonedDateTime> pastDates = new LinkedList<>();
+                if (tick.isAmbiguous()) {
                     pastDates.add(midnight.plus(halfDay + (long) tick.intValue(), ChronoUnit.SECONDS));
                     pastDates.add(midnight.plus(tick.intValue(), ChronoUnit.SECONDS));
                     pastDates.add(yesterdayMidnight.plus(tick.intValue() * 2L, ChronoUnit.SECONDS));
@@ -171,7 +172,6 @@ public class RepeaterTime extends Repeater<Tick> {
                         }
                     }
                 } else {
-                    List<ZonedDateTime> pastDates = new LinkedList<>();
                     pastDates.add(midnight.plus(tick.intValue(), ChronoUnit.SECONDS));
                     pastDates.add(yesterdayMidnight.plus(tick.intValue(), ChronoUnit.SECONDS));
                     for (ZonedDateTime pastDate : pastDates) {
@@ -183,18 +183,15 @@ public class RepeaterTime extends Repeater<Tick> {
                     }
                 }
             }
-
             if (!done && currentTime == null) {
                 throw new IllegalStateException("Current time cannot be null at this point.");
             }
         }
-
         if (!first) {
             int increment = tick.isAmbiguous() ? halfDay : fullDay;
             long direction = pointer == PointerType.FUTURE ? 1L : -1L;
             currentTime = currentTime.plus(direction * increment, ChronoUnit.SECONDS);
         }
-
         return new Span(currentTime, currentTime.plus(getWidth(), ChronoUnit.SECONDS));
     }
 

src/main/java/org/xbib/time/chronic/repeaters/RepeaterUnit.java

@@ -10,14 +10,23 @@ import java.util.regex.Pattern;
  *
  */
 public abstract class RepeaterUnit extends Repeater<Object> {
+
     private static final Pattern YEAR_PATTERN = Pattern.compile("^years?$");
+
     private static final Pattern MONTH_PATTERN = Pattern.compile("^months?$");
+
     private static final Pattern FORTNIGHT_PATTERN = Pattern.compile("^fortnights?$");
+
     private static final Pattern WEEK_PATTERN = Pattern.compile("^weeks?$");
+
     private static final Pattern WEEKEND_PATTERN = Pattern.compile("^weekends?$");
+
     private static final Pattern DAY_PATTERN = Pattern.compile("^days?$");
+
     private static final Pattern HOUR_PATTERN = Pattern.compile("^hours?$");
+
     private static final Pattern MINUTE_PATTERN = Pattern.compile("^minutes?$");
+
     private static final Pattern SECOND_PATTERN = Pattern.compile("^seconds?$");
 
     public RepeaterUnit() {
@@ -43,7 +52,9 @@ public abstract class RepeaterUnit extends Repeater<Object> {
                     String unitName = unitNameEnum.name();
                     String capitalizedUnitName = unitName.substring(0, 1) + unitName.substring(1).toLowerCase();
                     String repeaterClassName = RepeaterUnit.class.getPackage().getName() + ".Repeater" + capitalizedUnitName;
-                    return Class.forName(repeaterClassName).asSubclass(RepeaterUnit.class).newInstance();
+                    return Class.forName(repeaterClassName)
+                            .asSubclass(RepeaterUnit.class)
+                            .getConstructor().newInstance();
                 }
             }
             return null;
@@ -64,10 +75,4 @@ public abstract class RepeaterUnit extends Repeater<Object> {
                 ((Repeater) other).getNow().equals(getNow());
     }
 
-    /**
-     *
-     */
-    private enum UnitName {
-        YEAR, MONTH, FORTNIGHT, WEEK, WEEKEND, DAY, HOUR, MINUTE, SECOND
-    }
 }

src/main/java/org/xbib/time/chronic/repeaters/RepeaterWeek.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,7 +10,9 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterWeek extends RepeaterUnit {
+
     public static final int WEEK_SECONDS = 604800;
+
     public static final int WEEK_DAYS = 7;
 
     private ZonedDateTime currentWeekStart;
@@ -24,12 +26,12 @@ public class RepeaterWeek extends RepeaterUnit {
     protected Span internalNextSpan(PointerType pointer) {
         if (currentWeekStart == null) {
             if (pointer == PointerType.FUTURE) {
-                RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+                RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
                 sundayRepeater.setNow(getNow());
                 Span nextSundaySpan = sundayRepeater.nextSpan(PointerType.FUTURE);
                 currentWeekStart = nextSundaySpan.getBeginCalendar();
             } else if (pointer == PointerType.PAST) {
-                RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+                RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
                 sundayRepeater.setNow(getNow().plus(1, ChronoUnit.DAYS));
                 sundayRepeater.nextSpan(PointerType.PAST);
                 Span lastSundaySpan = sundayRepeater.nextSpan(PointerType.PAST);
@@ -52,20 +54,20 @@ public class RepeaterWeek extends RepeaterUnit {
         ZonedDateTime thisWeekEnd;
         if (pointer == PointerType.FUTURE) {
             thisWeekStart = ymdh(getNow()).plus(1, ChronoUnit.HOURS);
-            RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+            RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
             sundayRepeater.setNow(getNow());
             Span thisSundaySpan = sundayRepeater.thisSpan(PointerType.FUTURE);
             thisWeekEnd = thisSundaySpan.getBeginCalendar();
             thisWeekSpan = new Span(thisWeekStart, thisWeekEnd);
         } else if (pointer == PointerType.PAST) {
             thisWeekEnd = ymdh(getNow());
-            RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+            RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
             sundayRepeater.setNow(getNow());
             Span lastSundaySpan = sundayRepeater.nextSpan(PointerType.PAST);
             thisWeekStart = lastSundaySpan.getBeginCalendar();
             thisWeekSpan = new Span(thisWeekStart, thisWeekEnd);
         } else if (pointer == PointerType.NONE) {
-            RepeaterDayName sundayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SUNDAY);
+            RepeaterDayName sundayRepeater = new RepeaterDayName(DayName.SUNDAY);
             sundayRepeater.setNow(getNow());
             Span lastSundaySpan = sundayRepeater.nextSpan(PointerType.PAST);
             thisWeekStart = lastSundaySpan.getBeginCalendar();

src/main/java/org/xbib/time/chronic/repeaters/RepeaterWeekend.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,7 +10,8 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterWeekend extends RepeaterUnit {
-    public static final long WEEKEND_SECONDS = 172800L; // (2 * 24 * 60 * 60);
+
+    private static final long WEEKEND_SECONDS = 172800L; // (2 * 24 * 60 * 60);
 
     private ZonedDateTime currentWeekStart;
 
@@ -25,7 +26,7 @@ public class RepeaterWeekend extends RepeaterUnit {
         ZonedDateTime c;
         switch (pointer) {
             case PAST: {
-                RepeaterDayName saturdayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SATURDAY);
+                RepeaterDayName saturdayRepeater = new RepeaterDayName(DayName.SATURDAY);
                 saturdayRepeater.setNow(getNow().plus(RepeaterDay.DAY_SECONDS, ChronoUnit.SECONDS));
                 Span lastSaturdaySpan = saturdayRepeater.nextSpan(PointerType.PAST);
                 currentWeekStart = lastSaturdaySpan.getBeginCalendar();
@@ -33,7 +34,7 @@ public class RepeaterWeekend extends RepeaterUnit {
                 return new Span(currentWeekStart, c);
             }
             case FUTURE: {
-                RepeaterDayName saturdayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SATURDAY);
+                RepeaterDayName saturdayRepeater = new RepeaterDayName(DayName.SATURDAY);
                 saturdayRepeater.setNow(getNow());
                 Span nextSaturdaySpan = saturdayRepeater.nextSpan(PointerType.FUTURE);
                 currentWeekStart = nextSaturdaySpan.getBeginCalendar();
@@ -50,13 +51,13 @@ public class RepeaterWeekend extends RepeaterUnit {
     protected Span internalThisSpan(PointerType pointer) {
         Span thisSpan;
         if (pointer == PointerType.FUTURE || pointer == PointerType.NONE) {
-            RepeaterDayName saturdayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SATURDAY);
+            RepeaterDayName saturdayRepeater = new RepeaterDayName(DayName.SATURDAY);
             saturdayRepeater.setNow(getNow());
             Span thisSaturdaySpan = saturdayRepeater.nextSpan(PointerType.FUTURE);
             thisSpan = new Span(thisSaturdaySpan.getBeginCalendar(), thisSaturdaySpan.getBeginCalendar()
                     .plus(RepeaterWeekend.WEEKEND_SECONDS, ChronoUnit.SECONDS));
         } else if (pointer == PointerType.PAST) {
-            RepeaterDayName saturdayRepeater = new RepeaterDayName(RepeaterDayName.DayName.SATURDAY);
+            RepeaterDayName saturdayRepeater = new RepeaterDayName(DayName.SATURDAY);
             saturdayRepeater.setNow(getNow());
             Span lastSaturdaySpan = saturdayRepeater.nextSpan(PointerType.PAST);
             thisSpan = new Span(lastSaturdaySpan.getBeginCalendar(), lastSaturdaySpan.getBeginCalendar()

src/main/java/org/xbib/time/chronic/repeaters/RepeaterYear.java

@@ -1,7 +1,7 @@
 package org.xbib.time.chronic.repeaters;
 
 import org.xbib.time.chronic.Span;
-import org.xbib.time.chronic.tags.Pointer.PointerType;
+import org.xbib.time.chronic.tags.PointerType;
 
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
@@ -10,6 +10,7 @@ import java.time.temporal.ChronoUnit;
  *
  */
 public class RepeaterYear extends RepeaterUnit {
+
     private ZonedDateTime currentYearStart;
 
     private static ZonedDateTime ymd(ZonedDateTime zonedDateTime) {

src/main/java/org/xbib/time/chronic/repeaters/UnitName.java

@@ -0,0 +1,8 @@
+package org.xbib.time.chronic.repeaters;
+
+/**
+ *
+ */
+enum UnitName {
+    YEAR, MONTH, FORTNIGHT, WEEK, WEEKEND, DAY, HOUR, MINUTE, SECOND
+}

src/main/java/org/xbib/time/chronic/tags/Grabber.java

@@ -11,9 +11,12 @@ import java.util.regex.Pattern;
 /**
  *
  */
-public class Grabber extends Tag<Grabber.Relative> {
+public class Grabber extends Tag<Relative> {
+
     private static final Pattern THIS_PATTERN = Pattern.compile("this");
+
     private static final Pattern NEXT_PATTERN = Pattern.compile("next");
+
     private static final Pattern LAST_PATTERN = Pattern.compile("last");
 
     public Grabber(Relative type) {
@@ -49,10 +52,4 @@ public class Grabber extends Tag<Grabber.Relative> {
         return "grabber-" + getType();
     }
 
-    /**
-     *
-     */
-    public enum Relative {
-        LAST, NEXT, THIS
-    }
 }

src/main/java/org/xbib/time/chronic/tags/Ordinal.java

@@ -14,7 +14,7 @@ public class Ordinal extends Tag<Integer> {
 
     static final Pattern ORDINAL_PATTERN = Pattern.compile("^(\\d*)(st|nd|rd|th)$");
 
-    Ordinal(Integer type) {
+    protected Ordinal(Integer type) {
         super(type);
     }
 

src/main/java/org/xbib/time/chronic/tags/OrdinalDay.java

@@ -8,7 +8,8 @@ import java.util.regex.Matcher;
  *
  */
 public class OrdinalDay extends Ordinal {
-    public OrdinalDay(Integer type) {
+
+    private OrdinalDay(Integer type) {
         super(type);
     }
 

src/main/java/org/xbib/time/chronic/tags/Pointer.java

@@ -11,7 +11,7 @@ import java.util.regex.Pattern;
 /**
  *
  */
-public class Pointer extends Tag<Pointer.PointerType> {
+public class Pointer extends Tag<PointerType> {
 
     private static final Pattern IN_PATTERN = Pattern.compile("\\bin\\b");
 
@@ -52,10 +52,4 @@ public class Pointer extends Tag<Pointer.PointerType> {
         return "pointer-" + getType();
     }
 
-    /**
-     *
-     */
-    public enum PointerType {
-        PAST, FUTURE, NONE
-    }
 }

src/main/java/org/xbib/time/chronic/tags/PointerType.java

@@ -0,0 +1,8 @@
+package org.xbib.time.chronic.tags;
+
+/**
+ *
+ */
+public enum PointerType {
+    PAST, FUTURE, NONE
+}

src/main/java/org/xbib/time/chronic/tags/Relative.java

@@ -0,0 +1,8 @@
+package org.xbib.time.chronic.tags;
+
+/**
+ *
+ */
+public enum Relative {
+    LAST, NEXT, THIS
+}

src/main/java/org/xbib/time/chronic/tags/Scalar.java

@@ -13,8 +13,9 @@ import java.util.regex.Pattern;
  *
  */
 public class Scalar extends Tag<Integer> {
-    static final Set<String> TIMES =
+
-            new HashSet<>(Arrays.asList("am", "pm", "morning", "afternoon", "evening", "night"));
+    protected static final Set<String> TIMES = new HashSet<>(Arrays.asList("am", "pm", "morning", "afternoon", "evening", "night"));
+
     private static final Pattern SCALAR_PATTERN = Pattern.compile("^\\d*$");
 
     public Scalar(Integer type) {

src/main/java/org/xbib/time/chronic/tags/ScalarDay.java

@@ -9,6 +9,7 @@ import java.util.regex.Pattern;
  *
  */
 public class ScalarDay extends Scalar {
+
     private static final Pattern DAY_PATTERN = Pattern.compile("^\\d\\d?$");
 
     public ScalarDay(Integer type) {

src/main/java/org/xbib/time/chronic/tags/ScalarMonth.java

@@ -9,6 +9,7 @@ import java.util.regex.Pattern;
  *
  */
 public class ScalarMonth extends Scalar {
+
     private static final Pattern MONTH_PATTERN = Pattern.compile("^\\d\\d?$");
 
     public ScalarMonth(Integer type) {

src/main/java/org/xbib/time/chronic/tags/ScalarYear.java

@@ -9,6 +9,7 @@ import java.util.regex.Pattern;
  *
  */
 public class ScalarYear extends Scalar {
+
     private static final Pattern YEAR_PATTERN = Pattern.compile("^([1-9]\\d)?\\d\\d?$");
 
     private ScalarYear(Integer type) {

src/main/java/org/xbib/time/chronic/tags/Separator.java

@@ -8,9 +8,9 @@ import java.util.List;
 /**
  *
  */
-public class Separator extends Tag<Separator.SeparatorType> {
+public class Separator extends Tag<SeparatorType> {
 
-    Separator(SeparatorType type) {
+    public Separator(SeparatorType type) {
         super(type);
     }
 
@@ -42,10 +42,4 @@ public class Separator extends Tag<Separator.SeparatorType> {
         return "separator";
     }
 
-    /**
-     *
-     */
-    enum SeparatorType {
-        COMMA, DASH, SLASH, AT, IN
-    }
 }

src/main/java/org/xbib/time/chronic/tags/SeparatorAt.java

@@ -11,6 +11,7 @@ import java.util.regex.Pattern;
  *
  */
 public class SeparatorAt extends Separator {
+
     private static final Pattern AT_PATTERN = Pattern.compile("^(at|@)$");
 
     private SeparatorAt(SeparatorType type) {

src/main/java/org/xbib/time/chronic/tags/SeparatorComma.java

@@ -11,6 +11,7 @@ import java.util.regex.Pattern;
  *
  */
 public class SeparatorComma extends Separator {
+
     private static final Pattern COMMA_PATTERN = Pattern.compile("^,$");
 
     private SeparatorComma(SeparatorType type) {

src/main/java/org/xbib/time/chronic/tags/SeparatorSlashOrDash.java

@@ -11,7 +11,9 @@ import java.util.regex.Pattern;
  *
  */
 public class SeparatorSlashOrDash extends Separator {
+
     private static final Pattern SLASH_PATTERN = Pattern.compile("^/$");
+
     private static final Pattern DASH_PATTERN = Pattern.compile("^-$");
 
     public SeparatorSlashOrDash(SeparatorType type) {

src/main/java/org/xbib/time/chronic/tags/SeparatorType.java

@@ -0,0 +1,8 @@
+package org.xbib.time.chronic.tags;
+
+/**
+ *
+ */
+public enum SeparatorType {
+    COMMA, DASH, SLASH, AT, IN
+}

src/main/java/org/xbib/time/chronic/tags/StringTag.java

@@ -4,6 +4,7 @@ package org.xbib.time.chronic.tags;
  *
  */
 public class StringTag extends Tag<String> {
+
     public StringTag(String type) {
         super(type);
     }