public void decode(ACLMessageFactory.Encodings encoding) {
        if (isEncoded()) {
            Query q = (Query) decodeContent(getEncodedContent(),encoding);
            queryName = q.getQueryName();
            args = q.getArgs();

            if (args != null){
                for (int i = 0; i < args.length; i++) {
                    Object argument = args[i];
                    if (argument != null && argument instanceof  Variable){
                        Variable tmpVariable = Variable.variable;
                        if (((Variable)argument).isSet()){
                            tmpVariable.setValue(((Variable)argument).getValue());
                        }
                        args[i] = tmpVariable;
                    }
                }
            }

//            setEncodedContent(null);
            setEncoded(false);
        }
    }