/bundles/plugins-trunk/XInsert/src/CommandQueue.java

/*

 *

 * CommandQueue.java

 * Copyright (C) 2001 Dominic Stolerman

 * dstolerman@jedit.org

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */



import java.util.Vector;

import java.util.Enumeration;

import org.gjt.sp.util.Log;





public class CommandQueue {

  public CommandQueue() {

    queue = new Vector();

  }

  

  /**

   * Adds a command to th beginning of the queue;

   */

  public synchronized void addFirst(Command cmd) {

    queue.insertElementAt(cmd, 0);

    insertPos++;

  }

  

  /**

   * Adds commands to the end of the queue;

   */

  public synchronized void add(Command cmd) {

    queue.insertElementAt(cmd, insertPos);

    insertPos++;

  }

  

  /**

   * Adds commands to the queue to be run after those added using {@link #add(Command)} and {@link #addFirst(Command)}.

   */

  public synchronized void addLast(Command cmd) {

    queue.addElement(cmd);

  }

  

  public int size() {

    return queue.size();

  }

  

  public synchronized void executeNext(ScriptContext context) {

    ((Command) queue.remove(0)).run(context);

  }

  

  public void executeAll(ScriptContext context) {

    while(queue.size() != 0) {

      executeNext(context);

    }

  }

  

  private int insertPos = 0;

  private Vector queue;

}