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

[Sanne Grinovero]

thank you, "unproxy" worked great. Not sure why it wasn't there
already as I didn't change this area, apparently it was unlikely to
receive a proxy in this method.
Sanne

2010/12/1 Emmanuel Bernard <emmanuel at hibernate.org>:
> This exception in general can have a bunch of causes.
>
> In you case though, in Hibernate Search there are several tools at your disposal. All in HibernateHelper.
> For the most part they abstract away Hibernate calls for when we will make Hibernate Search fully independent of Hibernate Core.
>
> unproxy: returns this or the underlying implementation behind the proxy (could initialize the proxy by side effect)
> getClass: returns the entity class (even in case of proxies)
> initialize: intialize the proxy or the collection
> isInitialized: returns true if the proxy or the collection is initialized
> getClassFromWork: returns the entity class for a given work (probably should be put somewhere else when we abstract Hibernate truly.
>
> Emmanuel
>
> On 30 nov. 2010, at 21:20, Sanne Grinovero wrote:
>
>> 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
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