[hibernate-dev] object is not an instance of declaring class

[Sanne Grinovero]

Hello,
I'm blocked by the exception mentioned in the subject, this is also
affecting my work in Search:
with the new design I need the object identifier more often than before, and
even our own org.hibernate.search.test.proxy.ProxyTest fails.

Searching for similar exceptions I found many users asking for help
about the same error, also some
comments are quite recent so it would be nice to find a general solution:

HHH-5280
HHH-3399
HHH-1953
HHH-4064
https://forum.hibernate.org/viewtopic.php?t=979408

The error is that I'm invoking getId() via reflection, but the entity
instance is actually a javassist proxy.

Shouldn't org.hibernate.annotations.common.reflection.java.JavaXProperty
"shield" our code from this kind
of complexities?

Suggestions to proceed?
Sanne

stacktrace follows:

org.hibernate.HibernateException: Error while indexing in Hibernate
Search (before transaction completion)
	at org.hibernate.search.backend.impl.EventSourceTransactionContext$DelegateToSynchronizationOnBeforeTx.doBeforeTransactionCompletion(EventSourceTransactionContext.java:175)
	at org.hibernate.engine.ActionQueue$BeforeTransactionCompletionProcessQueue.beforeTransactionCompletion(ActionQueue.java:543)
	at org.hibernate.engine.ActionQueue.beforeTransactionCompletion(ActionQueue.java:216)
	at org.hibernate.impl.SessionImpl.beforeTransactionCompletion(SessionImpl.java:571)
	at org.hibernate.jdbc.JDBCContext.beforeTransactionCompletion(JDBCContext.java:250)
	at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:138)
	at org.hibernate.search.test.proxy.ProxyTest.testProxy(ProxyTest.java:63)
	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.hibernate.testing.junit.functional.annotations.HibernateTestCase.runTest(HibernateTestCase.java:97)
	at org.hibernate.testing.junit.functional.annotations.HibernateTestCase.runBare(HibernateTestCase.java:85)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:118)
	at junit.framework.TestSuite.runTest(TestSuite.java:208)
	at junit.framework.TestSuite.run(TestSuite.java:203)
	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.IllegalStateException: Could not get property value
	at org.hibernate.search.util.ReflectionHelper.getMemberValue(ReflectionHelper.java:94)
	at org.hibernate.search.engine.DocumentBuilderIndexedEntity.getIndexingId(DocumentBuilderIndexedEntity.java:699)
	at org.hibernate.search.engine.WorkPlan$PerClassWork.recurseContainedIn(WorkPlan.java:136)
	at org.hibernate.search.engine.WorkPlan.recurseContainedIn(WorkPlan.java:69)
	at org.hibernate.search.engine.AbstractDocumentBuilder.processSingleContainedInInstance(AbstractDocumentBuilder.java:773)
	at org.hibernate.search.engine.AbstractDocumentBuilder.processContainedInInstances(AbstractDocumentBuilder.java:322)
	at org.hibernate.search.engine.WorkPlan$PerEntityWork.processContainedIn(WorkPlan.java:268)
	at org.hibernate.search.engine.WorkPlan$PerClassWork.processContainedIn(WorkPlan.java:130)
	at org.hibernate.search.engine.WorkPlan.processContainedIn(WorkPlan.java:62)
	at org.hibernate.search.backend.impl.BatchedQueueingProcessor.prepareWorks(BatchedQueueingProcessor.java:150)
	at org.hibernate.search.backend.impl.PostTransactionWorkQueueSynchronization.beforeCompletion(PostTransactionWorkQueueSynchronization.java:86)
	at org.hibernate.search.backend.impl.EventSourceTransactionContext$DelegateToSynchronizationOnBeforeTx.doBeforeTransactionCompletion(EventSourceTransactionContext.java:172)
	... 25 more
Caused by: java.lang.IllegalArgumentException: Invoking id with wrong parameters
	at org.hibernate.annotations.common.reflection.java.JavaXProperty.invoke(JavaXProperty.java:84)
	at org.hibernate.search.util.ReflectionHelper.getMemberValue(ReflectionHelper.java:91)
	... 36 more
Caused by: java.lang.IllegalArgumentException: object is not an
instance of declaring class
	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 org.hibernate.annotations.common.reflection.java.JavaXProperty.invoke(JavaXProperty.java:74)
	... 37 more