public JPAConfigurationTask() 
{
	  
		setDescription("JPA Configuration");
}

 protected Configuration createConfiguration() 
{
		try {
			Map overrides = new HashMap();
			Properties p = getProperties();
			if(p!=null) {
				overrides.putAll( p );
			}
			Class clazz = ReflectHelper.classForName("org.hibernate.ejb.Ejb3Configuration", JPAConfigurationTask.class);
			Object ejb3cfg = clazz.newInstance();
			if(entityResolver!=null) {
				Class resolver = ReflectHelper.classForName(entityResolver, this.getClass());
				Object object = resolver.newInstance();
				Method method = clazz.getMethod("setEntityResolver", new Class[] { EntityResolver.class });
				method.invoke(ejb3cfg, new Object[] { object } );
			}
			Method method = clazz.getMethod("configure", new Class[] { String.class, Map.class });
			if ( method.invoke(ejb3cfg, new Object[] { persistenceUnit, overrides } ) == null ) {
				throw new BuildException("Persistence unit not found: '" + persistenceUnit + "'.");
			}
			method = clazz.getMethod("getHibernateConfiguration", new Class[0]);
			return (Configuration) method.invoke(ejb3cfg, null);
		} 
		catch(HibernateException he) {
			throw new BuildException(he);
		}
		catch(BuildException be) {
			throw be;
		}
		catch(Exception t) {
			throw new BuildException("Problems in creating a configuration for JPA. Have you remembered to add hibernate EntityManager jars to the classpath ?",t);			
		}
}

 protected  void doConfiguration(Configuration configuration) 
{

}

 public String getPersistenceUnit() 
{
		return persistenceUnit;
}

 public  void setConfigurationFile(File configurationFile) 
{
		complain("configurationfile");
}

 public  void setPersistenceUnit(String persistenceUnit) 
{
		this.persistenceUnit = persistenceUnit;
}

 protected  void validateParameters() throws BuildException 
{

}