public ScriptNode(String source) 
{
    this.source = source;
}

 public boolean invoke(Environment env,
    InvokeContext context) throws Exception 
{
    return true;
}

This method should never be called by the TreeProcessor, since a element should not be in an "executable" sitemap node.

 public  void registerScriptWithInterpreter(Interpreter interpreter) 
{
    if (interpreter instanceof AbstractInterpreter)
      ((AbstractInterpreter)interpreter).register(source);
}