message.java

ALGAE是一个快速创建算法演示的框架。目前支持的算法实现语言包括java和c

/**
 * Message.java
 *
 *
 * Created: Fri Apr 17 10:04:48 1998
 *
 * @author Steven Zeil
 * @version
 */
package edu.odu.cs.zeil.AlgAE;

import java.util.Vector;

import edu.odu.cs.zeil.AlgAE.MessageListener;

public class Message {
  private String messageKind;
  private Vector listeners;

  

  /**
   *  Messages received from the algorithm (server) are queued up until
   *  a forcing message is received.  Once the queue contains at least one
   *  forcing message, the messages in the queue can be dispatched for
   *  processing.  "Forcing" messages therefore represent the completion
   *  of some visual change that is described using many messages but should
   *  only be presented as a complete, atomic change to the visual picture.
   */
  private boolean msgIsForcing;
  
  
  public Message(String theMessageKind, boolean forcing) {
    messageKind = theMessageKind;
    listeners = new Vector();
    msgIsForcing = forcing;
  }

  /**
   * Get the value of isForcing.
   * @return Value of isForcing.
   */
  public boolean getIsForcing() {return msgIsForcing;}

  /**
   * Get the value of isForcing.
   * @return Value of isForcing.
   */
  public boolean isForcing() {return msgIsForcing;}
  
  /**
   * Set the value of isForcing.
   * @param v  Value to assign to isForcing.
   */
  public void setIsForcing(boolean  v) {msgIsForcing = v;}



  /**
   * Get the value of messageKind.
   * @return Value of messageKind.
   */
  public String getMessageKind() {return messageKind;}
  
  

  public void addMessageListener (MessageListener msgListener)
  {
    listeners.addElement(msgListener);
  }

  public void received (Vector params)
  {
    invokeListeners (params);
  }


  void invokeListeners (Vector params)
  {
    for (int i = 0; i < listeners.size(); ++i)
      {
	MessageListener msgl = (MessageListener)(listeners.elementAt(i));
	msgl.messageReceived (messageKind, params);
      }
  }

} // Message