elx/config/pmd/category/java/documentation.xml

<?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>