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https://issues.apache.org/jira/browse/OPENJPA-888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226944#comment-13226944
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Matthew T. Adams commented on OPENJPA-888:
------------------------------------------
Just hit this again myself:
[ERROR] Failed to execute goal
org.codehaus.mojo:openjpa-maven-plugin:1.2:enhance (enhancer) on project model:
A type incompatibility occured while executing
org.codehaus.mojo:openjpa-maven-plugin:1.2:enhance: serp.bytecode.CodeEntry
cannot be cast to serp.bytecode.Instruction
[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>org.codehaus.mojo:openjpa-maven-plugin:1.2
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] =
file:/home/matthew/.m2/repository/org/codehaus/mojo/openjpa-maven-plugin/1.2/openjpa-maven-plugin-1.2.jar
[ERROR] urls[1] =
file:/home/matthew/.m2/repository/org/apache/openjpa/openjpa/2.1.1/openjpa-2.1.1.jar
[ERROR] urls[2] =
file:/home/matthew/.m2/repository/commons-lang/commons-lang/2.4/commons-lang-2.4.jar
[ERROR] urls[3] =
file:/home/matthew/.m2/repository/commons-collections/commons-collections/3.2.1/commons-collections-3.2.1.jar
[ERROR] urls[4] =
file:/home/matthew/.m2/repository/net/sourceforge/serp/serp/1.13.1/serp-1.13.1.jar
[ERROR] urls[5] =
file:/home/matthew/.m2/repository/org/apache/geronimo/specs/geronimo-jta_1.1_spec/1.1.1/geronimo-jta_1.1_spec-1.1.1.jar
[ERROR] urls[6] =
file:/home/matthew/.m2/repository/commons-pool/commons-pool/1.5.4/commons-pool-1.5.4.jar
[ERROR] urls[7] =
file:/home/matthew/.m2/repository/org/apache/geronimo/specs/geronimo-jpa_2.0_spec/1.1/geronimo-jpa_2.0_spec-1.1.jar
[ERROR] urls[8] =
file:/home/matthew/.m2/repository/org/codehaus/plexus/plexus-utils/1.5.7/plexus-utils-1.5.7.jar
[ERROR] urls[9] =
file:/home/matthew/.m2/repository/log4j/log4j/1.2.14/log4j-1.2.14.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[maven.api, parent: null]]
[ERROR]
[ERROR] -----------------------------------------------------
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
It's been several years since the first reporting of this bug & the associated
Serp bug. Can you guys please fix this?
> Empty method in an entity causes errors while enhancing
> -------------------------------------------------------
>
> Key: OPENJPA-888
> URL: https://issues.apache.org/jira/browse/OPENJPA-888
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Affects Versions: 1.2.0
> Reporter: Simone Gianni
>
> I have a class subclassing another class. Both are entities. They have a
> method, which has nothing to do with JPA cause it's not a getter o a setter.
> The subclass overrides this method with an empty implementation, that is
> @Override public void theMethod() {} .
> As a result, OpenJPA throws an error while enhancing the subclass, more
> specifically the stacktrace is relative at SERP internals :
> java.lang.ClassCastException: serp.bytecode.CodeEntry cannot be cast to
> serp.bytecode.Instruction
> at serp.bytecode.Local.getEnd(Local.java:114)
> at serp.bytecode.Local.updateTargets(Local.java:155)
> at serp.bytecode.LocalTable.updateTargets(LocalTable.java:163)
> at serp.bytecode.Code.read(Code.java:2031)
> at serp.bytecode.Attributes.readAttributes(Attributes.java:152)
> at serp.bytecode.BCMember.read(BCMember.java:365)
> at serp.bytecode.BCClass.read(BCClass.java:123)
> at serp.bytecode.Project.loadClass(Project.java:211)
> Looking the Serp code and debugging it, I can confirm it is a SERP error, and
> opened a bug on its tracker
> (https://sourceforge.net/tracker2/?func=detail&aid=2556092&group_id=31479&atid=402282
> ).
> I'm opening this bug here to track the problem, and eventually use an updated
> version of SERP if/when they solve the problem.
> The most obvious workaround (which works) is to write something inside an
> empty method, a plain "int i = 0" will do the job.
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