generate schema with jpa annotations. Help!

werdafucami · **Joined:** Tue Mar 27, 2007 5:24 am **Posts:** 2

Hibernate 3 with jpa annotations, and trying to use schemaExportTask

When I try to create a schema using the SchemaExportTask I get the error

I get the error
Schema text failed: An AnnotationConfiguration instance is required to use <mapping class="nz.org.model.account.Account"/>

I have had a pretty good search around the web to no avail. I am guessing I need to declare something within my test_hibernate.cfg.xml? Surely I do not need to instantiate this class when I am generating the schema, right? I am using the persistence annotations in the Account class
(@Entity and @Id)

Ant snippet

Code:

<target name="schema-export">
      <taskdef classname="org.hibernate.tool.hbm2ddl.SchemaExportTask" classpathref="master.classpath" name="schemaexport" />
      <schemaexport drop="true" config="${test.dir}/test_hibernate.cfg.xml" output="${sql.dir}/schema.sql" quiet="false" text="false">
      </schemaexport>
   </target>

and test_hibernate.cfg.xml

Code:

<hibernate-configuration>
   <session-factory>

      <property name="connection.driver_class">
         com.mysql.jdbc.Driver
      </property>
      <property name="connection.url">
         jdbc:mysql://localhost/
      </property>
      <property name="connection.username">discomanifesto</property>
      <property name="connection.password"></property>
      <property name="dialect">
         org.hibernate.dialect.MySQLDialect
      </property>

      <!-- Mappings -->
      <!--<mapping package="com.discomanifesto.model."/>-->
      <mapping class="nz.org.mike.model.account.Account" />

   </session-factory>
</hibernate-configuration>

Help!

Thanks heaps,

Mike Casey

chk · **Posted:** Thu Apr 05, 2007 4:56 pm

but I want tell you that I ran into the same error, though not in the same situation.
I try to rewrite an application in JPA-Style. So it looks as if we do sth. wrong with annotations not so much like you the Schemawriting. My application worked until I started to rewrite it in JPA-manner.
It might have sth. 2do with the configuration file. Take a look at http://www.manning.com/bauer2/chapter2.pdf
Page 71

Regards, chk

christian · **Posted:** Fri Apr 06, 2007 3:48 am

You are using the wrong Ant task. What you are using is the original Hibernate Core SchemaExport task. This task can only handle Hibernate XML mapping files, not annotations. (Hibernate Core runs on JDK 1.4)

What you want is the "HibernateTool" task that comes with Hibernate Tools: http://tools.hibernate.org/

It's also described with examples in the PDF the previous poster already mentioned, see page 65.