I'm having some problems with the Property 'openjpa.Compatibility' and the
Value StrictIdentityValues=false.We are using IBM Websphere 6.1 incl. EJB3
Feature Pack (openJPA 1.0.4-SNAPSHOT) which by default sets this value to
'true'. In the following Scenario, I get an exception which I do not
understand, as I can't find a problem with the types of the Id-Fields.
@Entity
@Table(name = "FREITEXT")
public class Freitext
{
@Id
@Column(name = "FREITEXT_KEY")
private long key;
@Column(name = "PART_KEY")
private long partKey;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "PART_KEY")
private Partner partner;
}
@Entity
@Table(name = "PARTNER", schema = "PART")
@NamedQuery(name = "getPartner", query = "SELECT p FROM Partner p where
p.partKey = :partKey")
public class Partner
{
@Id
@Column(name = "PART_KEY")
private long partKey;
@OneToMany(mappedBy = "partner", fetch = FetchType.LAZY)
private List<Freitext> freitexte;
}
In case StrictIdentityValues is set 'true' (as default for the Websphere), this
leads to the following Exception when accessing parter.getFreitexte().
[15.04.09 10:43:45:577 CEST] 00000022 SystemErr R Caused by:
java.lang.ClassCastException: !(x instanceof Long)
at
org.apache.openjpa.util.ApplicationIds.fromPKValues(ApplicationIds.java:159)
at
org.apache.openjpa.jdbc.meta.ClassMapping.getObjectId(ClassMapping.java:192)
at
org.apache.openjpa.jdbc.meta.ClassMapping.getObjectId(ClassMapping.java:146)
at
org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy.load(RelationFieldStrategy.java:531)
at org.apache.openjpa.jdbc.meta.FieldMapping.load(FieldMapping.java:796)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:833)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:785)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:336)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:255)
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:844)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:802)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:724)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:776)
at
org.apache.openjpa.jdbc.sql.AbstractResult.load(AbstractResult.java:257)
at
org.apache.openjpa.jdbc.sql.SelectImpl$SelectResult.load(SelectImpl.java:2267)
at
org.apache.openjpa.jdbc.meta.strats.RelationToManyInverseKeyFieldStrategy.loadElement(RelationToManyInverseKeyFieldStrategy.java:87)
at
org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStrategy.loadElement(RelationCollectionInverseKeyFieldStrategy.java:76)
at
org.apache.openjpa.jdbc.meta.strats.StoreCollectionFieldStrategy.load(StoreCollectionFieldStrategy.java:479)
at org.apache.openjpa.jdbc.meta.FieldMapping.load(FieldMapping.java:802)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:485)
at
org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
at
org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78)
at
org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2886)
at
org.apache.openjpa.kernel.StateManagerImpl.loadField(StateManagerImpl.java:2964)
at
org.apache.openjpa.kernel.StateManagerImpl.beforeAccessField(StateManagerImpl.java:1463)
at
org.apache.openjpa.kernel.StateManagerImpl.accessingField(StateManagerImpl.java:1448)
at com.mbbank.model.Partner.pcGetfreitexte(Partner.java)
at com.mbbank.model.Partner.getFreitexte(Partner.java:776)
at
com.mbbank.services.GetPersonHandler.createNotes(GetPersonHandler.java:366)
If I set it to 'false', it works out quite well. Is somebody able to bring some
light in this issue, preferably why it might be necessary to have
StrictIdentityValues set 'false' and where my mistake could be? Any ideas would
be gladly welcome.
Sincerely,
Heiko Kopp
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