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https://issues.apache.org/jira/browse/OPENJPA-1912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Struberg updated OPENJPA-1912:
-----------------------------------
Attachment: OPENJPA-1912-test.patch
This unit test demontstrates the problem. I get the following output:
java.lang.IllegalAccessError: tried to access field
org.apache.openjpa.enhance.EnhancedSuperClass.id from class
org.apache.openjpa.enhance.EnhancedSubClass
at
org.apache.openjpa.enhance.EnhancedSubClass.writeExternal(EnhancedSubClass.java)
at
java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1421)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1390)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at
org.apache.openjpa.enhance.TestClassHierarchyEnhancement.serializeObject(TestClassHierarchyEnhancement.java:58)
at
org.apache.openjpa.enhance.TestClassHierarchyEnhancement.testSerialize(TestClassHierarchyEnhancement.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:154)
at
org.apache.openjpa.persistence.test.AbstractPersistenceTestCase.runTest(AbstractPersistenceTestCase.java:573)
> enhancer generates invalid code if fetch-groups is activated
> ------------------------------------------------------------
>
> Key: OPENJPA-1912
> URL: https://issues.apache.org/jira/browse/OPENJPA-1912
> Project: OpenJPA
> Issue Type: Bug
> Components: Enhance
> Affects Versions: 2.0.0, 2.0.1, 2.1.0
> Reporter: Mark Struberg
> Priority: Critical
> Attachments: OPENJPA-1912-test.patch
>
>
> If openjpa.DetachState =fetch-groups is used, the enhancer will add a
> 'implements Externalizable' + writeExternal + readExternal.
> The problem is, that writeExternal and readExternal will also try to
> externalize the private members of any given superclass. Thus we get a
> runtime Exception that we are not allowed to access those fields.
> Example:
> @Entity
> public abstract class AbstractGroup {
> ...
> @Temporal(TemporalType.TIMESTAMP)
> @TrackChanges
> private Date applicationBegin;
> ...
> }
> and
> @Entity
> public class Group extends AbstractGroup {
> ...
> }
> will result in the following code (decompiled with jad):
> public void writeExternal(ObjectOutput objectoutput)
> throws IOException
> {
> pcWriteUnmanaged(objectoutput);
> if(pcStateManager != null)
> {
> if(pcStateManager.writeDetached(objectoutput))
> return;
> } else
> {
> objectoutput.writeObject(pcGetDetachedState());
> objectoutput.writeObject(null);
> }
> objectoutput.writeObject(applicationBegin);
> objectoutput.writeObject(applicationEnd);
> objectoutput.writeObject(applicationLocked);
> objectoutput.writeObject(approvalRequired);
> ...
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