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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