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POJPA: Modelling a Map<Entity, Entity>
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  1. POJPA: Modelling a Map<Entity, Entity>
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    copied!<p>I am running into an exception when generating the database tables with EclipseLink for the following model:</p> <pre><code> @Entity @Table(name="RXRACTSPOT") public class ActivitySpot implements Serializable,IsSerializable { ..... @OneToMany private Map&lt;CustomAttributeDefinition, CustomAttributeRestriction&gt; customAttributes; </code></pre> <p>--</p> <pre><code>@Entity @Table(name="RXRCUSTATTRREST") public class CustomAttributeRestriction implements Serializable </code></pre> <p>--</p> <pre><code>@Entity @Table(name="RXRCUSTATTRDEF") public class CustomAttributeDefinition implements Serializable </code></pre> <p>I encounter the following exception:</p> <blockquote> <p>Exception in thread "main" javax.persistence.PersistenceException: Exception >[EclipseLink-0] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.IntegrityException</p> </blockquote> <p>Descriptor Exceptions: </p> <blockquote> <p>Exception [EclipseLink-93] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.DescriptorException Exception Description: The table [RXRCUSTATTRREST] is not present in this descriptor. Descriptor: RelationalDescriptor(com.rubiconred.activitystream.core.model.ActivitySpot --> [DatabaseTable(RXRACTSPOT)])</p> </blockquote> <p>Runtime Exceptions: </p> <blockquote> <p>java.lang.IndexOutOfBoundsException: Index: 0, Size: 0</p> </blockquote> <pre><code>at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:417) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:164) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:221) at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:209) at com.rubiconred.activitystream.database.ActivityStreamDatabaseUtils.dropAndCreateTables(ActivityStreamDatabaseUtils.java:64) at com.rubiconred.soauiext.server.db.CreateOneSpotDatabases.main(CreateOneSpotDatabases.java:16) </code></pre> <p>Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.IntegrityException</p> <p>If I remove the Map in RXRACTSPOT then the tables RXRCUSTATTREST and RXRCUSTATTRDEF are successfully created. With the Map neither table is created and the exception is thrown. I suspect I am missing some annotation on the Map but I have been unable to find an example for a Map with both key and value as Entities.</p>
 

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