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From Gary Jarrel <garyjar...@gmail.com>
Subject Exception when deleting in prePersist
Date Fri, 30 Jul 2010 08:57:02 GMT
Hi All (Again :)

I've got the following code:

@Override
protected void onPrePersist() {
    this.deleteIfEmptyCode();
}

@Override
protected void onPreUpdate() {
    this.deleteIfEmptyCode();
}

private void deleteIfEmptyCode() {
    if (StringUtils.isBlank(getProductCode())) {
        if (null != getObjectContext())
            getObjectContext().deleteObject(this);
    }
}

This code works perfectly via the preUpdate callback, however I get an
exception when the delete happens via a prePersist specifically when
the PersistenceState is NEW the exception is and it happens when I try
to commit the changes to the database.

java.lang.NullPointerException
	at org.apache.cayenne.reflect.LifecycleCallbackEventHandler.performCallbacks(LifecycleCallbackEventHandler.java:170)
	at org.apache.cayenne.reflect.LifecycleCallbackEventHandler.performCallbacks(LifecycleCallbackEventHandler.java:134)
	at org.apache.cayenne.reflect.LifecycleCallbackEventHandler.performCallbacks(LifecycleCallbackEventHandler.java:151)
	at org.apache.cayenne.reflect.LifecycleCallbackRegistry.performCallbacks(LifecycleCallbackRegistry.java:142)
	at org.apache.cayenne.access.DataChannelSyncCallbackAction.apply(DataChannelSyncCallbackAction.java:82)
	at org.apache.cayenne.access.DataChannelSyncCallbackAction$FlushCallbackAction.applyPostCommit(DataChannelSyncCallbackAction.java:178)
	at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:800)
	at org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:1106)
	at org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:1045)
	at au.riva.site.db.entity.MarketingCampaignProductTest.testOnPrePersist(MarketingCampaignProductTest.java:68)
	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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
	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)

Thank you all for all the assistance

Gary

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