Eve,
Can you explain in more details what are you trying to accomplish? What does it
mean to have a PK (Embedded or not) mapped to its own table?
Now my thoughts on your example: it shouldn't matter whether it's an EmbeddedId
or an IdClass, but the spec doesn't support relationship fields in either of
them, so you are at the persistence provider mercy to support such mapping.
thanks,
-marina
Eve Pokua wrote:
>
> So if I wanted this embeddable class as a table as well within my Database,
> I'm I better off using @IdClass than embeddable?
>
> Thanks
>
> eve
>
>> From: Cheng Fang <Cheng.Fang_at_Sun.COM>
>> Reply-To: ejb_at_glassfish.dev.java.net
>> To: ejb_at_glassfish.dev.java.net
>> Subject: Re: @Embeddable class
>> Date: Thu, 14 Jun 2007 13:47:00 -0400
>>
>> One thing that stands out is, Embeddable class doesn't have
>> persistence identity so don't use @Table annotation on the embeddable
>> class.
>>
>> The stacktrace doesn't seem to show the root cause.
>>
>> A simple example of using @Embeddable and @EmbeddedId (from Java
>> Persistence spec). Refer to the spec for more details:
>>
>> @Entity
>> public class Employee {
>> @EmbeddedId public EmployeePK getEmpPK() { ... }
>> ...
>> }
>>
>>
>> @Embeddable
>> public class EmployeePK {
>> String name;
>> Date bday;
>> }
>>
>> -cheng
>>
>> Eve Pokua wrote:
>>
>>> Hello everyone,
>>>
>>> I have 3 entity classes:
>>>
>>> @Entity
>>> @Table(name="CUSTOMER")
>>> public class Customerent implements Serializable {
>>> ........................
>>>
>>> .........................}
>>>
>>>
>>> ---------------------------------------------------------------------------------------------------------------
>>>
>>>
>>>
>>> @Entity
>>> @Table(name="ITEMS")
>>>
>>> ..................
>>>
>>> public class Iteamdetailsent implements Serializable{
>>> .............................
>>> .............................
>>> .............................}
>>>
>>>
>>>
>>> ---------------------------------------------------------------------------------------------------------------
>>>
>>>
>>>
>>> @Entity
>>> @Table(name="COLLECTPOINTORDERS")
>>>
>>> public class CollOrdersrement implements java.io.Serializable{
>>>
>>> ......................................................}
>>>
>>>
>>>
>>>
>>> ----------------------------------------------------------------------------------------------
>>>
>>>
>>>
>>> I am trying to make all these classed into composite keys, so I
>>> created an embeddable class as follows:
>>>
>>> package StockInformation;
>>> import java.util.Collection;
>>> import java.util.List;
>>> import javax.ejb.*;
>>> import javax.persistence.Column;
>>> import javax.persistence.Embeddable;
>>> import javax.persistence.Entity;
>>> import javax.persistence.Id;
>>> import javax.persistence.JoinColumn;
>>> import javax.persistence.ManyToMany;
>>> import javax.persistence.ManyToOne;
>>> import javax.persistence.OneToMany;
>>> import javax.persistence.Table;
>>>
>>>
>>> @Embeddable
>>> @Table(name="COLLPOINTORDERLINE")
>>>
>>> public class CollOrdlinementPK implements java.io.Serializable{
>>>
>>>
>>>
>>>
>>> @JoinColumn(name="itmid")
>>>
>>> private Iteamdetailsent iteamdetailsent;
>>>
>>>
>>> @JoinColumn(name="cusid")
>>> @ManyToOne
>>> private Customerent customerent;
>>>
>>> @JoinColumn(name="collOrdID")
>>> @ManyToOne
>>> private CollOrdersrement collOrdersrement;
>>>
>>>
>>> }
>>>
>>>
>>>
>>> I get the following errors:
>>>
>>> [#|2007-06-14T10:02:14.312+0100|SEVERE|sun-appserver-pe9.0|javax.enterprise.system.tools.deployment|_ThreadID=16;_ThreadName=Thread-36;_RequestID=14698a97-5f07-4767-89d2-9d7c3a0538b7;|Exception
>>> occured in J2EEC Phase
>>> com.sun.enterprise.deployment.backend.IASDeploymentException
>>> at java.util.AbstractList$Itr.next(AbstractList.java:427)
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataDescriptor.getPrimaryKeyFieldName(MetadataDescriptor.java:494)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ObjectAccessor.processOneToOneForeignKeyRelationship(ObjectAccessor.java:107)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ObjectAccessor.processOwningMappingKeys(ObjectAccessor.java:92)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ManyToOneAccessor.process(ManyToOneAccessor.java:73)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.RelationshipAccessor.processRelationship(RelationshipAccessor.java:250)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProject.processRelationshipDescriptors(MetadataProject.java:513)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProject.process(MetadataProject.java:445)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor.processAnnotations(MetadataProcessor.java:203)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.processORMetadata(EntityManagerSetupImpl.java:993)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:501)
>>>
>>>
>>> at
>>> oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createContainerEntityManagerFactory(EntityManagerFactoryProvider.java:152)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.PersistenceProcessor.loadPersistenceUnitBundle(PersistenceProcessor.java:467)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.PersistenceProcessor.createTablesInDB(PersistenceProcessor.java:325)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.PersistenceProcessor.processAppBundle(PersistenceProcessor.java:190)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.PersistenceProcessor.processApplication(PersistenceProcessor.java:125)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl.processApplication(DeploymentEventListenerImpl.java:193)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl.processEvent(DeploymentEventListenerImpl.java:152)
>>>
>>>
>>> at
>>> com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl.notifyDeploymentEvent(DeploymentEventListenerImpl.java:109)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.backend.DeploymentEventManager.notifyDeploymentEvent(DeploymentEventManager.java:66)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.backend.AppDeployer.postDeploy(AppDeployer.java:429)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.backend.AppDeployer.deploy(AppDeployer.java:225)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.backend.AppDeployer.doRequestFinish(AppDeployer.java:129)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.phasing.J2EECPhase.runPhase(J2EECPhase.java:169)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:95)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:871)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:266)
>>>
>>>
>>> at
>>> com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:739)
>>>
>>>
>>> at
>>> com.sun.enterprise.management.deploy.DeployThread.deploy(DeployThread.java:174)
>>>
>>>
>>> at
>>> com.sun.enterprise.management.deploy.DeployThread.run(DeployThread.java:210)
>>>
>>>
>>> |#]
>>>
>>>
>>>
>>>
>>> Bearing in mind this is my first time of Embeddable classes, what am
>>> I doing wrong?
>>>
>>> Thanks
>>>
>>> eve
>>>
>>> _________________________________________________________________
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>
> _________________________________________________________________
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