Good morning at all
I'm using Hibernate version: 3.1 and Hibernate tools version: 3.1 beta 5

I tried this script to generate Java model code from my *.hbm.xml mapping files:

<target name="create-code" depends="init">
<taskdef name="hbm2java" classname="org.hibernate.tool.ant.Hbm2JavaExporterTask">
<classpath>
<fileset dir="${lib.dir}" includes="*.jar" />
<pathelement location="${build.classes.dir}/" />
</classpath>
</taskdef>
<hbm2java output="${src.dir}">
<fileset dir="${src.dir}/etc/hibernate/" includes="**/*.hbm.xml" />
</hbm2java>
</target>

<target name="init">
<echo message="build.compiler = ${build.compiler}" />
<echo message="user.home = ${user.home}" />
<echo message="java.home = ${java.home}" />
<echo message="ant.home = ${ant.home}" />
<echo message="java.class.path = ${java.class.path}" />
<echo message="" />
<available classname="java.lang.StrictMath" property="jdk1.3+" />
</target>

but Ant throws this message :

Could not create type hbm2java due to java.lang.NoSuchMethodException: org.hibernate.tool.ant.Hbm2JavaExporterTask.<init>(org.apache.tools.ant.Project)

What's wrong in my script ?

read the docs for Hibernate 3 tools ;)

(for lazy people you can also read migration guide at http://www.hibernate.org/385.html)

Thank you. I read the document an find a solution.

<target name="create-code">
<mkdir dir="${build.dir}/generated" />
<hibernatetool destdir="${build.dir}/generated">
<configuration configurationfile="${etc.dir}/hibernate/hibernate.cfg.xml">
</configuration>
<hbm2java jdk5="true" ejb3="false"/>
</hibernatetool>
</target>

Now I encounter another error:

java.lang.NoSuchMethodError: org.hibernate.mapping.Property.getGeneration()Lorg/hibernate/mapping/PropertyGeneration;

org.hibernate.tool.hbm2x.ExporterException: Error while processing template Pojo

What is that mean ? I've got the wrog library version ?

that you are not using the hibernate that is bundled with the tools.