buddycomparator.java

java实现msn的功能

/*
 * @(#)BuddyComparator.java
 *
 * Copyright (c) 2002, Jang-Ho 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 Jang-Ho 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: BuddyComparator.java,v 1.1 2002/03/10 04:58:19 xrath Exp $
 */
package rath.jmsn.util;

import java.util.Comparator;

import rath.msnm.UserStatus;
import rath.msnm.entity.MsnFriend;

import rath.jmsn.BuddyRenderer;
/**
 * 阿 滚叼甸狼 Node甫 Tree俊 硅摹窍绰 沥纺 鉴辑甫 搬沥秦林绰 Comparator 努贰胶捞促.
 * <p>
 * 厚背 鉴辑绰 老窜 快急鉴困绰 <b>惑怕</b>捞促.
 * 惑怕绰 快急鉴困绰 促澜苞 鞍促.
 * <p>
 * 柯扼牢 &gt; 官惠, 烹拳吝, 侥荤吝 &gt; 磊府厚框, 磊悼磊府厚框 &gt; 坷橇扼牢
 * <p>
 * 弊府绊 鞍篮 惑怕狼 模备甸埃俊绰 泅犁 钎矫捞抚(LoginName捞带, FriendlyName捞带)俊 蝶扼
 * 沥纺等促.
 *
 * @author Jang-Ho Hwang, [e-mail]
 * @version $Id: BuddyComparator.java,v 1.1 2002/03/10 04:58:19 xrath Exp $
 */
public class BuddyComparator implements Comparator
{
	private int viewMode = BuddyRenderer.VIEW_FRIENDLY_NAME;

	/**
	 * 泅犁 焊扁 惑怕啊 Email牢瘤 酒囱瘤甫 汲沥茄促.
	 *
	 * @param viewEmail
	 */
	public void setBuddyView( int mode )
	{
		this.viewMode = mode;
	}

	/**
	 * 泅犁 焊扁 惑怕啊 Email牢瘤 酒囱瘤甫 犬牢茄促.
	 *
	 * @return Email肺 焊扁扼搁 true, 酒聪扼搁 false甫 馆券且 巴捞促.
	 */
	public int getBuddyView()
	{
	    return this.viewMode;
	}

    public int compare(Object o1, Object o2)
    {
		MsnFriend f0 = (MsnFriend)o1;
		MsnFriend f1 = (MsnFriend)o2;

		String s0 = f0.getStatus();
		String s1 = f1.getStatus();

		String name0 = viewMode!=BuddyRenderer.VIEW_FRIENDLY_NAME ? f0.getLoginName() : f0.getFriendlyName();
		String name1 = viewMode!=BuddyRenderer.VIEW_FRIENDLY_NAME ? f1.getLoginName() : f1.getFriendlyName();

		boolean online0 = s0.equals(UserStatus.ONLINE);
		boolean online1 = s1.equals(UserStatus.ONLINE);

		// 茄疙捞 ONLINE捞绊, 唱赣瘤绰 ONLINE捞 酒匆锭.
		if( online0 && !online1 ) return -50000;
		if( !online0 && online1 ) return 50000;
		// 笛促 柯扼牢捞搁 捞抚栏肺 厚背
	    if( online0 && online1 ) return name0.compareTo( name1 );

		// 咯扁鳖瘤 吭促搁, 公炼扒 柯扼牢篮 酒聪促.
		boolean busy0 =
			s0.equals(UserStatus.BE_RIGHT_BACK) || s0.equals(UserStatus.BUSY) ||
			s0.equals(UserStatus.ON_THE_LUNCH) || s0.equals(UserStatus.ON_THE_PHONE);
		boolean busy1 =
			s1.equals(UserStatus.BE_RIGHT_BACK) || s1.equals(UserStatus.BUSY) ||
			s1.equals(UserStatus.ON_THE_LUNCH) || s1.equals(UserStatus.ON_THE_PHONE);

		if( busy0 && !busy1 ) return -40000;
		if( !busy0 && busy1 ) return 40000;
		if( busy0 && busy1 ) return name0.compareTo( name1 );

		boolean away0 = s0.equals(UserStatus.AWAY_FROM_COMPUTER) || s0.equals(UserStatus.IDLE);
		boolean away1 = s1.equals(UserStatus.AWAY_FROM_COMPUTER) || s1.equals(UserStatus.IDLE);

		if( away0 && !away1 ) return -30000;
		if( !away0 && away1 ) return 30000;
		if( away0 && away1 ) return name0.compareTo( name1 );

		return name0.compareTo( name1 );
    }

    public boolean equals(Object obj)
    {
		return false;
    }
}