add hasSubfields() method to MarcField builder

README.adoc

@@ -6,9 +6,12 @@
 
 ## Bibliographic data processing library for Java
 
-image:https://api.travis-ci.org/xbib/marc.svg[Build status]
-image:https://img.shields.io/sonar/http/nemo.sonarqube.com/org.xbib:marc/coverage.svg?style=flat-square[Coverage]
-image:https://maven-badges.herokuapp.com/maven-central/org.xbib/marc/badge.svg[Maven Central]
+image:https://api.travis-ci.org/xbib/marc.svg[title="Build status", link="https://travis-ci.org/xbib/marc/"]
+image:https://img.shields.io/sonar/http/nemo.sonarqube.com/org.xbib:marc/coverage.svg?style=flat-square[title="Coverage", link="https://sonarqube.com/dashboard/index?id=org.xbib%3Amarc"]
+image:https://maven-badges.herokuapp.com/maven-central/org.xbib/marc/badge.svg[title="Maven Central", link="http://search.maven.org/#search%7Cga%7C1%7Cxbib%20marc"]
+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"]
+image:https://img.shields.io/twitter/url/https/twitter.com/xbib.svg?style=social&label=Follow%20%40xbib)[title="Twitter", link="https://twitter.com/xbib"]
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 This is a Java library for processing bibliographic data in the following formats:
 

build.gradle

@@ -12,6 +12,9 @@ apply plugin: 'pmd'
 apply plugin: 'checkstyle'
 apply plugin: "jacoco"
 
+group = "org.xbib"
+version = "1.0.5"
+
 configurations {
     wagon
     provided

gradle.properties

@@ -1,3 +0,0 @@
-group = org.xbib
-version = 1.0.4
-org.gradle.daemon = true

src/main/java/org/xbib/marc/MarcField.java

@@ -516,6 +516,14 @@ public class MarcField implements Comparable<MarcField> {
             return tag == null;
         }
 
+        /**
+         * Has this MARC field subfields?
+         * @return true if subfields exist
+         */
+        public boolean hasSubfields() {
+            return !subfields.isEmpty();
+        }
+
         /**
          * Build a MARC field.
          * @return the built MARC field.
@@ -524,6 +532,13 @@ public class MarcField implements Comparable<MarcField> {
             return new MarcField(tag, indicator, position, length,
                     value, subfields, subfieldIds.toString(), isControl());
         }
+
+        @Override
+        public String toString() {
+            return "tag=" + tag + ",indicator=" + indicator +
+                    ",value=" + value + ",subfields=" +
+                    subfields;
+        }
     }
 
     /**