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From "Dain Sundstrom (JIRA)" <>
Subject [jira] Reopened: (OPENJPA-315) Unenhanced generated id field of a primitive wrapper type causes NPE
Date Tue, 28 Aug 2007 15:33:30 GMT


Dain Sundstrom reopened OPENJPA-315:

> I don't follow -- are you saying that you are seeing a data corruption problem? 

No.  I said "could cause data corruption".   Any improperly loaded field in a bean could cause
data corruption simply because the data isn't 100% normalized.  For example, someone could
make a calculation using the primary key, which was improperly set to 0, and then store that
calculation in another bean.

> Note that OpenJPA will not assign an ID field until it needs to, so you should call flush()
or em.getObjectId() before checking to > see if an ID field has been provided.

Please review and apply this test.  You may have already fixed the bug when fixing the other
issues I committed, but I believe this is the only test for this specific issue.   If you
have already added another test for this bug, that is fine also but should be noted in this
bug report for completeness.

> Unenhanced generated id field of a primitive wrapper type causes NPE
> --------------------------------------------------------------------
>                 Key: OPENJPA-315
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>            Reporter: Dain Sundstrom
>            Priority: Critical
>             Fix For: 1.0.0
>         Attachments: OPENJPA-315.patch
> Unenhanced generated id field of a primitive wrapper type causes NPE because the field
value is null.  This bug only occurs when the id field is an object type as primitive fields
are automatically initialized to 0.  I believe this is a critical bug because when using a
primitive field the system appears to work but the id field is always 0 which could cause
data corruption.  The following stack trace shows the bug:
> <openjpa-0.0.0-r420667:564688M nonfatal general error> org.apache.openjpa.persistence.PersistenceException:
> 	at org.apache.openjpa.kernel.BrokerImpl.persist(
> 	at org.apache.openjpa.kernel.BrokerImpl.persist(
> 	at org.apache.openjpa.kernel.DelegatingBroker.persist(
> 	at org.apache.openjpa.persistence.EntityManagerImpl.persist(
> 	at org.apache.openjpa.enhance.AbstractUnenhancedClassTest.getObjectIdHelper(
> 	at org.apache.openjpa.enhance.AbstractUnenhancedClassTest.testGetObjectIdOnOpenJPAType(
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(
> 	at com.intellij.rt.execution.junit.JUnitStarter.main(
> Caused by: java.lang.NullPointerException
> 	at org.apache.openjpa.util.ApplicationIds.fromPKValues(
> 	at org.apache.openjpa.enhance.ReflectingPersistenceCapable.pcNewObjectIdInstance(
> 	at org.apache.openjpa.util.ApplicationIds.create(
> 	at org.apache.openjpa.kernel.BrokerImpl.persist(
> 	... 23 more
> The attached patch reproduces this bug.  The patch is a clone of TestUnenhancedFieldAccess
that simply changes the id field to type Integer. 

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