Hibernate 2.1.4
M$ SQl Server 2000


I have 3 classes (actually 6, but if I solve this issue for the 1st 3 then I will have solved it for the other 3 also. I have 2 databases I need to talk to. The 2nd db will be easy since it's new and WILL use surrogate keys. However the 1st database uses composite keys and I have spent the last 2.5 days tryin to map something that will likely be trivial were I to have more than a week of hibernate mapping under my belt.

To summarize in a nutshell, class A has an integer primary key and a one-to-many relationship with class B. Class c also has an integer primary key and a one-to-many relationship with class B. Class B has a composite id composed of the primary keys from A and C. When I try and save an instance of class B then hibernate barfs with the following error:


01:04:23,528 ERROR SessionImpl:2375 - Could not synchronize database state with session
net.sf.hibernate.MappingException: No persister for: java.lang.Integer
at net.sf.hibernate.impl.SessionFactoryImpl.getPersister(SessionFactoryImpl.java:344)
at net.sf.hibernate.impl.SessionImpl.getClassPersister(SessionImpl.java:2686)
at net.sf.hibernate.impl.SessionImpl.getPersister(SessionImpl.java:2693)
at net.sf.hibernate.impl.SessionImpl.getEntityIdentifierIfNotUnsaved(SessionImpl.java:2755)
at net.sf.hibernate.type.EntityType.getIdentifier(EntityType.java:66)
at net.sf.hibernate.type.ManyToOneType.nullSafeSet(ManyToOneType.java:47)
at net.sf.hibernate.type.ComponentType.nullSafeSet(ComponentType.java:154)
at net.sf.hibernate.persister.EntityPersister.dehydrate(EntityPersister.java:399)
at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:466)
at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:442)
at net.sf.hibernate.impl.ScheduledInsertion.execute(ScheduledInsertion.java:29)
at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2414)
at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2367)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2236)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at com.trizetto.healthweb.core.internal.model.AddressTest.testCreateAddress(AddressTest.java:112)
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:324)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:421)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:305)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:186)



I opened an issue,
http://opensource.atlassian.com/projects/hibernate/browse/HB-1059, and got the following response from Christian Bauer:

Your one-to-many association has to have the same number of key columns
as the references entity. Please use the user forum.

Hopefully someone of this list can go into more detail because I'm at a loss for what he means. The code I posted in the issue was not my mapping files, but instead the mapping files generated by the Middlegen-Hibernate-r4.zip distrobution.