[OPENJPA-1704] PCEnhancer incorrectly generates readExternal

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.2, 2.0.0, 2.1.0
• Fix Version/s: 1.2.3, 2.0.1, 2.1.0
• Component/s: kernel
• Assignee: Richard G. Curtis
• Reporter: Richard G. Curtis
• Created: 21/Jun/10 15:26
• Updated: 09/Feb/11 15:13
• Resolved: 19/Jul/10 21:23

Description

OPENJPA-1400 introduced a bug that can be encountered when reading a streamed object under the following circumstances:

• Using a serializable DetachedStateManager (<property name="openjpa.DetachState" value="fetch-groups(DetachedStateField=true)"/>)
• The Entity needs to have a version field AND either:
• If no inheritance, a 'proxyable' (ie: java.sql.Date, java.util.List) field with a name that is lexicographically after the version field.
• If using inheritance, a 'proxyable' (ie: java.sql.Date, java.util.List) field in a child class.

The bug could manifest itself in a number of ways. Below is the one I was able to reproduce.
java.lang.IllegalArgumentException
at org.apache.openjpa.persistence.inheritance.serializable.A.pcProvideField(A.java)
at org.apache.openjpa.kernel.DetachedStateManager.proxyDetachedDeserialized(DetachedStateManager.java:438)
at org.apache.openjpa.persistence.inheritance.serializable.A.readExternal(A.java)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.apache.openjpa.persistence.inheritance.serializable.TestSerialization.serializeObject(TestSerialization.java:105)
at org.apache.openjpa.persistence.inheritance.serializable.TestSerialization.testRoundTrip(TestSerialization.java:48)
...

Issue Links

• is related to: OPENJPA-1912 enhancer generates invalid code if fetch-groups is activated