[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3868) Merging transient entity with a component property with parent mapping causes NullPointerException

[Vinnie Luther (JIRA)]

Merging transient entity with a component property with parent mapping causes NullPointerException
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                 Key: HHH-3868
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3868
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.3.1, 3.2.6
         Environment: Core 3.3.1.GA, Annotations 3.4.0.GA, HSQL 1.8, SQLServer2005
            Reporter: Vinnie Luther
         Attachments: TransientMergeComponentParent.zip

Merge a transient entity with a component mapping with a parent mapping causes 
java.lang.NullPointerException
	at org.hibernate.engine.StatefulPersistenceContext.proxyFor(StatefulPersistenceContext.java:693)
	at org.hibernate.type.ComponentType.instantiate(ComponentType.java:515)
	at org.hibernate.type.ComponentType.replace(ComponentType.java:482)
	at org.hibernate.type.TypeFactory.replace(TypeFactory.java:538)
	at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:429)
	at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:231)
	at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:170)
	at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:81)
	at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:704)
	at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:688)
	at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:692)
	at test.TransientMergeComponentParentTest.testTransientMergeComponentParent(TransientMergeComponentParentTest.java:31)
	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.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
	at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
	at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
	at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
	at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
	at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:66)
	at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
	at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
	at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
	at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:45)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

Removing @Parent mappings from component solved the problem.  Attached is an eclipse project with demonstration minus the hibernate core 3.3.1, annotations 3.4.0 dependencies and hsqldb jar.

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