ROBOT.LK

Code: Select all

class MessageFactory {
    private MessageFactory() {
    }

    static Message createInboundMessage(String message, NetworkThread s) throws Exception {
        try {
            StringBuffer className = new StringBuffer("net.msnlib.");
            if (Character.isDigit(message.charAt(0)) ) {
                className.append('E');
            }
            className.append(message.substring(0, 3));
            className.append("Message");
            //Class m = MessageFactory.class.getClassLoader().loadClass(className.toString());
            
            //Constructor con = m.getConstructor(new Class[] {String.class, NetworkThread.class});
            //return (Message)con.newInstance(new Object[] {message,s});
            return (Message)Class.forName(className.toString()).newInstance();
        } catch (Exception e) {
             e.printStackTrace();
             throw new Exception("Un-known command");
        }
        
    }
}

Code: Select all

package lib.msn;




class MessageFactory {
    
    private MessageFactory() {


    }

    
    static Message createInboundMessage(String message, NetworkThread s) throws Exception {
        try {
            
            String classType;
            if(Character.isDigit(message.charAt(0)) ) {              
                classType="E";
            }else{
            classType=message.substring(0, 3);
            }
            System.out.println("Message From message factory:: Order recieved for a "+classType);
            String msgT;
            
            msgT=s.getMessageType(classType);
           // GetMessageType(String type) is implemented in NetworkThread class. I implemented it there since it is the 
           // only class that will be instantiated during the whole application life. 
           // I have created a Hashtable, when I input the message type (VER,CVR,USR,XFR,MSG .... etc) , i look up the            //   hash table and get the relevant numerical value so i can use it in switch statement... 
                

            System.out.println(msgT);
            System.out.println("");
            int msgSerialNumber=Integer.parseInt(msgT);

            switch(msgSerialNumber){
                case 1:
                    return new VERMessage(message, s);
                case 2:
                    return new USRMessage(message, s);
                case 3:
                    return new SYNMessage(message,s);
                case 4:
                    return new CVRMessage(message,s);
                default:
                    throw new Exception();
            }
            
        } catch (Exception e) {
             e.printStackTrace();
             throw new Exception("Un-known command");
        }
        
    }

    
}