ClassCastException when base entity class has InheritanceType.SINGLE_TABLE base
with multiple entity subclasses
---------------------------------------------------------------------------------------------------------------
Key: OPENJPA-2015
URL: https://issues.apache.org/jira/browse/OPENJPA-2015
Project: OpenJPA
Issue Type: Bug
Components: jpa
Affects Versions: 1.2.2, 1.2.3
Reporter: Albert Lee
Assignee: Albert Lee
Fix For: 1.2.3
If multiple entity subclasses extends a entity base class using
InheritanceType.SINGLE_TABLE, with mx1 relation from base class to itself, a
ClassCastException may occur when the mx1 collection is not empty due to a
problem in discriminating the proper entity subclass type.
Caused by: java.lang.ClassCastException: problem.domain.InputItemRecord
at
problem.domain.InputBatchHeaderRecord.pcReplaceField(InputBatchHeaderRecord.java)
at
org.apache.openjpa.kernel.StateManagerImpl.replaceField(StateManagerImpl.java:3041)
at
org.apache.openjpa.kernel.StateManagerImpl.storeObjectField(StateManagerImpl.java:2473)
at
org.apache.openjpa.kernel.StateManagerImpl.storeObject(StateManagerImpl.java:2463)
at
org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy.loadEagerJoin(RelationFieldStrategy.java:541)
at
org.apache.openjpa.jdbc.meta.FieldMapping.loadEagerJoin(FieldMapping.java:807)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:1052)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:1012)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:378)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:278)
at
org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
at
org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:913)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:871)
... 38 more
For example:
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "DISCRIMATOR", discriminatorType =
DiscriminatorType.INTEGER)
@DiscriminatorValue("99")
public class NachaInputRecord {
@Id
public long identifier;
@ManyToOne(cascade = CascadeType.MERGE,fetch=FetchType.EAGER)
@ForeignKey
@JoinColumn(name = "PARENT_ID")
private NachaInputRecord parent;
....
@Entity
@DiscriminatorValue("6")
public class InputItemRecord extends NachaInputRecord {
.....
@Entity
@DiscriminatorValue("8")
public class InputBatchControlRecord extends NachaInputRecord {
.....
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