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https://issues.apache.org/jira/browse/OPENJPA-302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13158862#comment-13158862
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Rick Curtis commented on OPENJPA-302:
-------------------------------------
Committed revision 1207658 to trunk. Thanks for the patch Jacob!
> PCEnhancer needs target classes on classpath
> --------------------------------------------
>
> Key: OPENJPA-302
> URL: https://issues.apache.org/jira/browse/OPENJPA-302
> Project: OpenJPA
> Issue Type: Improvement
> Components: docs
> Affects Versions: 0.9.7
> Environment: Eclipse
> Reporter: Carl Smotricz
> Assignee: Jacob Nowosatka
> Priority: Minor
> Fix For: 2.2.0
>
> Attachments: OPENJPA-302.patch
>
>
> The documentation (sections 3.5.2.1, 3.12.1.2) doesn't make it clear that the
> classes to be enhanced need to be on the class path of the PCEnhancer
> application or Ant task. In an Eclipse environment, I battled for some hours
> to get the enhancer to work.
> In my setup, the following appears to be true:
> * The application needs a classpath consisting of the OpenJPA libraries as
> well as the java compilation destination directory for the compiled entity
> classes. Here's how I ran the program (as an application) under Ant:
> <target name="enhance2">
> <java classpathref="JPA_PATH" classpath="build/classes"
> classname="org.apache.openjpa.enhance.PCEnhancer">
> <arg line="-d build/classes -p
> build/classes/META-INF/persistence.xml
> build/classes/com/smotricz/testjpa/Exit.class"/>
> </java>
> </target>
> * As an Ant task, the taskdef needs the OpenJPA libraries on its classpath,
> but it does no good to include the compiled classes destination path there.
> Rather, the openjpa task will accept a nested classpath element, and this
> classpath must contain both the OpenJPA libraries and the compiled entity
> classes path. Here's my Ant target for this:
> <target name="enhance">
> <taskdef name="openjpac"
> classname="org.apache.openjpa.ant.PCEnhancerTask" classpathref="JPA_PATH"/>
> <path id="ENH_PATH">
> <path refid="JPA_PATH"/>
> <path refid="CLASSES_PATH"/>
> </path>
> <openjpac directory="build/classes">
> <config
> propertiesFile="build/classes/META-INF/persistence.xml"/>
> <fileset dir="build/classes">
> <include name="**/*.class"/>
> <exclude name="**/TestJPA.class"/>
> </fileset>
> <classpath refid="ENH_PATH"/>
> </openjpac>
> </target>
>
> Hopefully augmenting the doc with some of this information will save other
> users some pain.
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