Exception when deleting in prePersist

From: Gary Jarrel (garyjarre..mail.com)
Date: Fri Jul 30 2010 - 08:57:02 UTC

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    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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