A little confused - basic hbm2java ANT question

xaeryan · **Joined:** Fri May 04, 2007 3:43 pm **Posts:** 18

Why does the hbm2java task require my class files in order to generate POJO files from the mapping file? This defeats the purpose of autogenerating the .java files if I have to already have the class files! I must be doing something wrong, as this can't be the logical way of doing this...

Here's what I mean; I have the following build.xml task:

Code:

<!-- Hibernate Tools import -->
    <taskdef name="hibernatetool"
             classname="org.hibernate.tool.ant.HibernateToolTask"
             classpathref="project.classpath"/>
   
   <!-- Auto create POJOs from mapping file -->
   <target name="hibernate">
      <hibernatetool destdir="${build.dir}\gen">
         <configuration configurationfile="${src.cfg.dir}/hibernate.cfg.xml"/>
         <hbm2java jdk5="true"/>
      </hibernatetool>
   </target>
   

And when I run it I get the following error:

Code:

[hibernatetool] org.hibernate.InvalidMappingException: Could not parse mapping d
ocument from resource OracleVars.hbm.xml
[hibernatetool] org.hibernate.MappingException: class Workstations not found whi
le looking for property: Actions
[hibernatetool] java.lang.ClassNotFoundException: com.pac.server.common.oraclevars.Workstations
[hibernatetool] A class were not found in the classpath of the Ant task.
[hibernatetool] Ensure that the classpath contains the classes needed for Hibern
ate and your code are in the classpath.

My mapping file contains very basic sections, like so:

Code:

   <class name="com.pac.server.common.oraclevars.Workstations" table="WORKSTATIONS">
      <id name="id" type="int" column="ID" >
         <generator class="assigned"/>
      </id>
      <property name="Actions">
         <column name="ACTIONS"/>
      </property>
   </class>

I don't understand why hibernate-tools cares about finding my class in order to create the POJOs. Shouldn't it simply use the hbm.xml information to generate the .java files itself?

max · **Posted:** Sun May 13, 2007 4:14 pm

if you don't specify a type for your property hbm2java fall back to try and resolve it from the classpath.

so remember to specify the types.

xaeryan · **Joined:** Fri May 04, 2007 3:43 pm **Posts:** 18

Max,

That worked perfectly, thanks. Now I'm trying to auto-generate the mapping files, and I'm having the same problem when using hbm2hbmxml though (in that it is looking for the mapping file to already exist). So I must be missing something in my cfg.xml file as well...

Code:

<hibernate-configuration>
<session-factory>
      <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
      <property name="hibernate.connection.url">*****</property>
      <property name="hibernate.connection.username">*****</property>
      <property name="hibernate.connection.password">*****</property>
      <property name="hibernate.connection.pool_size">10</property>
      <property name="show_sql">true</property>
      <property name="dialect">org.hibernate.dialect.OracleDialect</property>
      <property name="hibernate.hbm2ddl.auto">update</property>
      <!-- Mapping files -->
     <mapping resource="OracleVars.hbm.xml"/>
</session-factory>
</hibernate-configuration>

I'm assuming there's another attribute to <mapping resouce> that I must specify, but I cannot find anything as to what it is. Any thoughts?

max · **Posted:** Mon May 14, 2007 10:32 am

eh don't list the mapping file in *.cfg.xml if it is not supposed to be there yet.

xaeryan · **Joined:** Fri May 04, 2007 3:43 pm **Posts:** 18

Hmm, ok I think I'm confusing myself then... without the reference to the map file, how does hbm2hbmxml know what tables in the database to generate map files from? When I remove my reference to the map file, it does not generate any map files.

max · **Posted:** Mon May 14, 2007 11:20 am

if you use a <jdbcconfiguration> it will go to the db and ask for all schemas.

if you specify default_schema it will only look in that

and finally you can use reveng.xml file to finecontrol what it should match.