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02.22.2007 at 12:24PM PST, ID: 22407458
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9.0

Using 2 Classes that represent the same database table with EJB3

Asked by ethnarch in Enterprise Java Beans (EJB), Java Programming Language, J2EE

Tags: , , ,

i have 2 classes that both refer to the same table in 2 seperate parts of my application.  Another words say i have a table

parenttable
   ID
   Name
   Date

In each section of my app i only need 1 of the 2 child tables that refer to sometable's id with a foreignkey.  Instead of mapping both of child classes to the parent class, I only mapped one.  Then in the other section of my app i created another parentclass with is only mapped the the second child class.

I keep getting an error that duplicate imports exist:
(BELOW COLLECTION IS THE PARENT CLASS)

Caused by: javax.persistence.PersistenceException: org.hibernate.AnnotationException: Use of the same entity name twice: Collection
        at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:252)
        at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:120)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
        at collectionEntry.Collection.<clinit>(Collection.java:46)
        ... 23 more
Caused by: org.hibernate.AnnotationException: Use of the same entity name twice: Collection
        at org.hibernate.cfg.annotations.EntityBinder.bindEntity(EntityBinder.java:259)
        at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:532)
        at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:452)
        at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:268)
        at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1115)
        at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1233)
        at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:154)
        at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:869)
        at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:183)
        at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:240)
        ... 27 more
Caused by: org.hibernate.DuplicateMappingException: duplicate import: Collection refers to both boothstat_downloader.Collection and collectionEntry.Collection (try using auto-import="false")
        at org.hibernate.cfg.Mappings.addImport(Mappings.java:141)
        at org.hibernate.cfg.annotations.EntityBinder.bindEntity(EntityBinder.java:252)
        ... 36 more

The file i am using that describes the persistance unit is:
  <persistence-unit name="Booth_StatPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <class>boothstat_downloader.Collection</class>
    <class>boothstat_downloader.MoneyDisplay</class>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.FirebirdDialect"/>
      <property name="hibernate.connection.url" value="jdbc:firebirdsql:warehouse01/3050:c:\\zee03\\database\\showtechDB.FDB"/>
      <property name="hibernate.connection.driver_class" value="org.firebirdsql.jdbc.FBDriver"/>
      <property name="hibernate.connection.password" value="masterkey"/>
      <property name="hibernate.connection.username" value="sysdba"/>
      <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
    </properties>
  </persistence-unit>
  <persistence-unit name="CollectionEntryPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <class>collectionEntry.Collection</class>
    <class>collectionEntry.CollectionCount</class>
    <properties>
      <property name="hibernate.connection.url" value="jdbc:firebirdsql:warehouse01/3050:c:\\zee03\\database\\showtechDB.FDB"/>
      <property name="hibernate.connection.driver_class" value="org.firebirdsql.jdbc.FBDriver"/>
      <property name="hibernate.connection.password" value="masterkey"/>
      <property name="hibernate.connection.username" value="sysdba"/>
      <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
    </properties>
  </persistence-unit>

is there anyway to make this work so that it does not try to load both Collection Classes?Start Free Trial
 
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[+][-]02.22.2007 at 12:28PM PST, ID: 18591145

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About this solution

Zones: Enterprise Java Beans (EJB), Java Programming Language, J2EE
Tags: same, name, entity, use
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Solution Provided By: mayankeagle
Participating Experts: 1
Solution Grade: A
 
 
[+][-]02.22.2007 at 12:42PM PST, ID: 18591292

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[+][-]02.22.2007 at 12:49PM PST, ID: 18591354

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[+][-]02.22.2007 at 01:20PM PST, ID: 18591640

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