I have a class called PartyAssociation which has a many-to-one relation with a polymorphic class Party whose sub-classes (Person and Organization) are defined using
Code:
<joined-subclass>
. Party, Person and Organization share the same primary key i.e. PARTY_ID.
When I retrieve a PartyAssociation object using a query on the session and then invoke the method partyAssociation.getParty().getPartyId(), the behaviour is random.
Most of the time it is successful, but suddenly it starts throwing "ClassCastException". Note that all entities in the polymorphic association have proxy interfaces defined (PartyIntf, PersonIntf and OrganizationIntf). Are there any key things that i should look for?
I have made sure that the PARTY_ID does not exist in both the PERON table and the ORGANIZATION table.
Hibernate version: 3.0
Mapping documents:Party Mapping
Code:
<class proxy="PartyIntf"
name="Party" table="PARTY">
<id name="partyId" column="PARTY_ID">
<generator class="sequence">
<param name="sequence">PARTY_ID_SEQ</param>
</generator>
</id>
<property name="partyType" type="string">
<column name="PARTY_TYPE" sql-type="VARCHAR2"/>
</property>
<set name="addresses" table="PARTY_ADDRESS" cascade="all" >
<key column="PARTY_ID" not-null="true"/>
<one-to-many class="PartyAddress" />
</set>
<set name="registeredIds" table="PARTY_REGISTERED_IDS" cascade="all">
<key column="PARTY_ID" />
<one-to-many class="RegistrationIdentity" />
</set>
<set name="partyAssociations" inverse="true" cascade="all">
<key column="PARTY_ID"/>
<one-to-many class="PartyAssociation" />
</set>
<joined-subclass proxy="PersonIntf"
name="Person" table="PERSON" >
<key column="PARTY_ID"/>
<property name="dateOfBirth" type="date" >
<column name="DATE_OF_BIRTH" sql-type="DATE" />
</property>
<property name="employer" type="string">
<column name="EMPLOYER_NAME" sql-type="VARCHAR2"/>
</property>
</joined-subclass>
<joined-subclass proxy="OrganizationIntf"
name="Organization" table="ORGANIZATION">
<key column="PARTY_ID"/>
<component name="orgName" class="OrganizationName">
<property name="businessName" type="string">
<column name="BUSINESS_NAME" sql-type="VARCHAR2"/>
</property>
</component>
</joined-subclass>
</class>
Party Association Mapping
Code:
<class name="PartyAssociation" table="PARTY_INSTITUTION_ASSOCIATION" lazy="false">
<id name="associationId" column="UNIQUE_ASSOCIATION_ID">
<generator class="sequence" >
<param name="sequence">PARTY_ASSOCIATION_SEQ</param>
</generator>
</id>
<many-to-one name="party"
class="Party" column="party_id" />
<many-to-one name="institution"
class="Institution" column="institution_id" />
<property name="associateId" type="integer">
<column name="INSTITUTION_ASSOCIATION_ID" sql-type="NUMBER"/>
</property>
</class>
Code:
StringBuffer query = new StringBuffer("from PartyAssociation as association ");
query.append("where association.institution.institutionId = ").append(theInstitutionId)
.append(" and association.associateId= ").append(theAssociationId);
System.out.println("*********************************");
PartyAssociation partyAssociation =
(PartyAssociation)theHibernateSessionObject.createQuery(query.toString()).uniqueResult();
PartyIntf party = partyAssociation.getParty();
System.out.println("######################> " + party.getClass().getName());
[b] System.out.println("######################> " + party.getPartyId());[/b]
System.out.println("######################> " + party.getPartyType());
System.out.println("######################> " + party.getPartyAssociations().size());
System.out.println("*********************************");
Full stack trace of any exception that occurs:Code:
java.lang.ClassCastException: com.vsoftcorp.coresoft.model.party.hibernate.Organization
at com.vsoftcorp.coresoft.model.party.PersonIntf$$FastClassByCGLIB$$e9f9a0d.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:183)
at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:137)
at com.vsoftcorp.coresoft.model.party.PersonIntf$$EnhancerByCGLIB$$19344702.getPartyId(<generated>)
at com.vsoftcorp.coresoft.model.party.hibernate.Parties.findPartyAssociation(Parties.java:112)
at com.vsoftcorp.coresoft.command.GetCommercialCustomerCommand.perform(GetCommercialCustomerCommand.java:90)
at test.com.vsoftcorp.coresoft.command.GetCommercialCustomerCommandTest.testGetGetCommercialCustomerCommand(GetCommercialCustomerCommandTest.java:66)
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:585)
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 org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:474)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:342)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:194)
Name and version of the database you are using:
Oracle 10g
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