[OPENJPA-1407] ClassCastException at DataCacheStoreManager.loadAll

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.2.0
• Component/s: datacache
• Patch Info: Patch Available
• Assignee: Ravi Prakash Palacherla
• Reporter: Ravi Prakash Palacherla
• Created: 01/Dec/09 17:34
• Updated: 21/Sep/16 14:21
• Resolved: 16/Dec/09 17:45

Description

the following exception stack trace is seen in kodo :

[java] Caused by: java.lang.ClassCastException: com.sample.TestTableId
[java] at org.apache.openjpa.datacache.DataCacheStoreManager.loadAll(DataCacheStoreManager.java:461)
[java] at org.apache.openjpa.kernel.DelegatingStoreManager.loadAll(DelegatingStoreManager.java:121)
[java] at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:984)
[java] at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1027)
[java] at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913)
[java] at org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:217)
[java] at org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:184)
[java] at org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78)
[java] at org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197)
[java] at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:147)
[java] at org.apache.openjpa.datacache.DataCacheStoreManager.initialize(DataCacheStoreManager.java:343)
[java] at org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
[java] at org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
[java] at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:894)
[java] at kodo.kernel.KodoBroker.initialize(KodoBroker.java:65)

Reason behind the above exception is because when application identity class is used;
In openJPA, ObjectId is generated by enhancer generated method pcnewObjectIdInstance and it returns wrapped identity class
like as follows.
public Object pcNewObjectIdInstance()

{ return new ObjectId(ApplicationIdentityIdClass.class, new AppId()); }

So, the change was not affected to OpenJPA code.
However, in OpenJPA derived products like Kodo, pcNewObjectIdInstance returns raw application identity class instance.
Due to this "oidList.add((OpenJPAId) sm.getObjectId())" throws classcast exception.