Composite-Id code Generation

afattahi · **Joined:** Mon Jan 24, 2005 11:56 am **Posts:** 24

Hi,

Does hbm2java supports composite-id?! We are using HibernateTools-3.1.0.beta4.

Code:

<hibernate-mapping package="com.mycompany.dal.entity">
    <meta attribute="use-in-tostring">true</meta>
    <meta attribute="use-in-equals">true</meta>
    <meta attribute="extends">com.mycompany.dal.entity.StandardEntity</meta>
    <class name="Role" table="user_roles">
        <composite-id name="id" class="Role$Id"> <!-- or RolePK none work! -->
            <key-property name="userName" type="string" column="user_name" length="15"/>
            <key-property name="roleName" type="string" column="role_name" length="15"/>
        </composite-id>
    </class>
</hibernate-mapping>

generates:

Code:

org.hibernate.MappingException: component class not found: com.mycompany.dal.entity.Role$Id
   at org.hibernate.mapping.Component.getComponentClass(Component.java:105)
   at org.hibernate.tuple.PojoComponentTuplizer.buildGetter(PojoComponentTuplizer.java:140)
   at org.hibernate.tuple.AbstractComponentTuplizer.<init>(AbstractComponentTuplizer.java:79)
   at org.hibernate.tuple.PojoComponentTuplizer.<init>(PojoComponentTuplizer.java:33)
   at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:126)
   at org.hibernate.mapping.Component.getType(Component.java:160)
   at org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:152)
   at org.hibernate.cfg.Configuration.iterateGenerators(Configuration.java:601)
   at org.hibernate.cfg.Configuration.generateDropSchemaScript(Configuration.java:712)
   at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:96)
   at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:64)
   at org.hibernate.tool.ant.Hbm2DDLExporterTask.execute(Hbm2DDLExporterTask.java:43)
   at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:143)
   at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
   at org.apache.tools.ant.Task.perform(Task.java:364)
   at org.apache.tools.ant.Target.execute(Target.java:341)
   at org.apache.tools.ant.Target.performTasks(Target.java:369)
   at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
   at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
   at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
   at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
   at org.apache.tools.ant.Main.runBuild(Main.java:668)
   at org.apache.tools.ant.Main.startAnt(Main.java:187)
   at org.apache.tools.ant.launch.Launcher.run(Launcher.java:246)
   at org.apache.tools.ant.launch.Launcher.main(Launcher.java:67)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:16)
Caused by: java.lang.ClassNotFoundException: com.mycompany.dal.entity.Role$Id
   at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1166)
   at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1107)
   at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:977)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
   at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
   at java.lang.Class.forName0(Native Method)
   at java.lang.Class.forName(Class.java:164)
   at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:108)
   at org.hibernate.mapping.Component.getComponentClass(Component.java:102)
   ... 29 more

If we generate RolePk every think will go fine.

Any Idea?!

Regards,
Alireza Fattahi

max · **Posted:** Sun Apr 09, 2006 10:21 am

it is schemaexport (hbm2ddl) that complains here.

my guess is that you are running hbm2java and hbm2ddl in one go which is pretty hard since you haven't compiled the classes yet which is needed for hbm2ddl.

mgitman · **Joined:** Tue Apr 25, 2006 11:03 am **Posts:** 1

Disregard! The mapping file below was correct after all.

I'm trying to generate Java source from .hbm.xml files using the Ant hibernatetool task. I'm using the latest Hibernate Tools (3.1 beta 5) with Hibernate 3.1. The hibernatetool/hbm2java utility has a problem with a mapping file with a composite-id. Here's the mapping file:

Code:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping 
  PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping package="domain.account">

  <class name="CustomerEmail" table="CUSTOMER_EMAILS">
    <composite-id>
      <key-many-to-one name="customer" column="CUSTOMER_ID"
        class="Customer" />
      <key-many-to-one name="email" column="EMAIL_ID"
        class="Email" />
    </composite-id>

    <property name="primary" column="PRIMARY" type="boolean" />
    <property name="billing" column="BILLING" type="boolean" />
    <property name="technical" column="TECHNICAL" type="boolean" />

  </class>
</hibernate-mapping>

max · **Posted:** Tue Apr 25, 2006 1:30 pm

...and what is the problem?