public DefaultRevisionInfoGenerator(String revisionInfoEntityName,
    Class revisionInfoClass,
    Class listenerClass,
    PropertyData revisionInfoTimestampData) 
{
        this.revisionInfoEntityName = revisionInfoEntityName;
        this.revisionInfoClass = revisionInfoClass;
        revisionTimestampSetter = ReflectionTools.getSetter(revisionInfoClass, revisionInfoTimestampData);
        if (!listenerClass.equals(RevisionListener.class)) {
            // This is not the default value.
            try {
                listener = listenerClass.newInstance();
            } catch (InstantiationException e) {
                throw new MappingException(e);
            } catch (IllegalAccessException e) {
                throw new MappingException(e);
            }
        } else {
            // Default listener - none
            listener = null;
        }
}

 public Object generate(Session session) 
{
        Object revisionData = newRevision();
        session.save(revisionInfoEntityName, revisionData);
        return revisionData;
}