grouplist.java

J2me实现的MSN Messeger客户端程序。聊天、添加好友、删除好友、阻止好友

/*
 * @(#)GroupList.java
 *
 * Copyright (c) 2001-2002, JangHo Hwang
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 	1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 	2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * 	3. Neither the name of the JangHo Hwang nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *    $Id: GroupList.java,v 2.0 2004/12/21 16:15:08 chenzs Exp $
 */
package vitular.msnp;

import java.util.Vector;
import java.util.Hashtable;
import java.util.Enumeration; //Iterator-->Enumeration ceze 2004/5/29
import vitular.msnp.entity.Group;

/**
 * 好友组列表
 * <p>Title: MSNP Lib</p>
 * <p>Description: Unija 版Msn协议</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: Vitular</p>
 * @author ceze
 * @version 1.0
 */
public class GroupList {
  private final Vector list;
  private final Hashtable map;

  GroupList() {
    list = new Vector();
    map = new Hashtable();
  }

  /**
   * 添加分组
   * @param group Group
   */
  public void addGroup(Group group) {
    Object o = map.put(group.getIndex(), group);
    if (o == null)
      list.addElement(group);
    else {
      Group grp = (Group) o;
      grp.setName(group.getName());
    }
  }


  /**
   *
   * @param index int
   * @return Group
   */
  public Group getGroup(int index) {
    return getGroup(new Integer(index));
  }

  /**
   *
   * @param index Integer
   * @return Group
   */
  public Group getGroup(Integer index) {
    return (Group) map.get(index);
  }

  /**
   *
   * @param index int
   */
  public void removeGroup(int index) {
    removeGroup(new Integer(index));
  }

  /**
   *
   * @param index Integer
   */
  public void removeGroup(Integer index) {
    Object o = map.remove(index);
    if (o == null)
      throw new IllegalArgumentException("no group in " + index);
    list.removeElement(o);
  }

  public Enumeration enumeration() {
    return list.elements();
  }

  /**
   * Group成员数量
   * @return int
   */
  public int size(){
    return list.size();
  }

//  public synchronized void sort() {
//    Collections.sort(list, new Comparator() {
//      public int compare(Object o1, Object o2) {
//        Group g0 = (Group) o1;
//        Group g1 = (Group) o2;
//        return g0.getFormattedName().compareTo(
//            g1.getFormattedName());
//      }
//
//      public boolean equals(Object o) {
//        return false;
//      }
//    });
//  }

  public void clear() {
    list.removeAllElements();
    map.clear();
  }
}