[OPENJPA-940] Using table-generator in XML descriptor results in ClassCastException

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.2.0, 2.0.0-M2
• Fix Version/s: 2.1.1
• Environment: Windows XP; Java SE 6 Update 11
• Assignee: Catalina Wei
• Reporter: Ulrich Hermsen
• Created: 25/Feb/09 07:58
• Updated: 17/Feb/11 14:11
• Resolved: 17/Feb/11 04:12

Description

Defining a table generator in the XML descriptor leads to a class cast exception. The reason is a probably unintentional fall through of a switch/case block in class XMLPersistenceMetaDataSerializer line 502:

...
switch (type) {
case TYPE_META:
serializeClass((ClassMetaData) obj, fieldAccess
&& propertyAccess);
break;
case TYPE_SEQ:
if (isMappingMode())
serializeSequence((SequenceMetaData) obj);
// HERE SHOULD BE A break;
case TYPE_QUERY:
serializeQuery((QueryMetaData) obj);
break;
...

As a result I get the following stack:

219 testPU INFO [main] openjpa.Runtime - Starting OpenJPA 1.2.0
688 testPU INFO [main] openjpa.jdbc.JDBC - Using dictionary class "org.apache.openjpa.jdbc.sql.DerbyDictionary".
3329 testPU WARN [main] openjpa.MetaData - Found duplicate generator "tableGen" in "class com.daimler.tss.lab.jpa.pojo.Slave". Ignoring.
3830 testPU INFO [main] openjpa.MetaData - Writing to file "C:\Uli\Workspaces\TSS_ganymede_2\OpenJPA Test\build\classes\META-INF\test-orm.xml".
3986 testPU INFO [main] openjpa.MetaData - Writing sequence "tableGen".
Exception in thread "main" <openjpa-1.2.0-r422266:683325 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: org.apache.openjpa.jdbc.meta.SequenceMapping cannot be cast to org.apache.openjpa.meta.QueryMetaData
at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:196)
at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:142)
at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:192)
at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:145)
at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:56)
at com.daimler.tss.lab.jpa.test.RelationshipManagementTest.createMaster(RelationshipManagementTest.java:47)
at com.daimler.tss.lab.jpa.test.RelationshipManagementTest.main(RelationshipManagementTest.java:39)
Caused by: java.lang.ClassCastException: org.apache.openjpa.jdbc.meta.SequenceMapping cannot be cast to org.apache.openjpa.meta.QueryMetaData
at org.apache.openjpa.persistence.XMLPersistenceMetaDataSerializer.serialize(XMLPersistenceMetaDataSerializer.java:504)
at org.apache.openjpa.lib.meta.XMLMetaDataSerializer.serialize(XMLMetaDataSerializer.java:257)
at org.apache.openjpa.lib.meta.XMLMetaDataSerializer.serialize(XMLMetaDataSerializer.java:121)
at org.apache.openjpa.lib.meta.XMLMetaDataSerializer.serialize(XMLMetaDataSerializer.java:90)
at org.apache.openjpa.meta.AbstractCFMetaDataFactory.serialize(AbstractCFMetaDataFactory.java:479)
at org.apache.openjpa.meta.AbstractCFMetaDataFactory.store(AbstractCFMetaDataFactory.java:234)
at org.apache.openjpa.jdbc.meta.MappingTool.record(MappingTool.java:538)
at org.apache.openjpa.jdbc.meta.MappingTool.record(MappingTool.java:453)
at org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.synchronizeMappings(JDBCBrokerFactory.java:159)
at org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.newBrokerImpl(JDBCBrokerFactory.java:119)
at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:189)
... 6 more

May I suggest to run findBugs on your source code. That would have found this section for sure. Does anyone test the XML descriptor stuff?