Java Doclet Example

This repository contain an example how to create a Java Doclet using Gradle.

Example Project

The doclet contained in this repository creates an XML documentation of the test cases contained in the same project.

To create the XML documentation use the following command:

./gradlew doc

This creates an XML file located at lib/build/docs/testcases.xml:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<testsuite>
    <testcase classname="org.example.doclet.LibraryTest" name="someTest">
        <description>A Dummy Testcase.</description>
    </testcase>
    <testcase classname="org.example.doclet.LibraryTest" name="anotherTest">
        <description>Another Testcase.</description>
    </testcase>
    <testcase classname="org.example.doclet.LibraryTest" name="undocumentedTest">
        <description/>
    </testcase>
</testsuite>

Pitfalls

There were some pitfalls encountered during development of the example.

Gradle needs additional JavaDoc options

Gradles makes use of some specific JavaDoc options that are contained in the standard JavaDoc doclet but not necessarily in a custom Doclet:

Option	Parameter	Description
-d	directory	Specify directory of output files
-notimestamp	-	Do not include hidden time stamp

In order to let gradle use a custom Doclet these options mus be available in the Doclet's command line options.

Quirks in build.gradle

The build.gradle in this project comes with some quirks:

afterEvaluate {
  task doc(type: Javadoc) {
    dependsOn classes
    source = sourceSets.test.allJava
    classpath += sourceSets.test.compileClasspath
    options.doclet = "org.example.doclet.TestCaseDoclet"
    options.docletpath = (sourceSets.main.output + sourceSets.main.compileClasspath) as List
    destinationDir = project.docsDir
    title = ""
  }
}

This reason for these quirks is the uncommon use case of this example to document test cases of the same project that contains the Doclet. I simple wanted to test the Doclet without the need of another project.

License

falk-werner/java-doclet-example

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