【設(shè)計模式與Android】責(zé)任鏈模式——曹瞞兵敗走華容

public abstract class General {

    protected General nextGeneral;

    /**
     * 姓名
     */
    public abstract String getName();

    /**
     * 武力
     */
    public abstract int getForce();

    /**
     * 攔截曹操
     * @param force 曹操手下將軍能拿出來的最高武力
     */
    public final void tryCaoCao(int force){
        if (force <= getForce()){
            catchCaoCao();
        }else{
            if (nextGeneral != null){
                nextGeneral.tryCaoCao(force);
            }
        }
    }

    /**
     * 有能力抓獲曹操
     */
    public void catchCaoCao(){
        Log.e("曹操無路可逃","曹操兵敗走華容，正與" + getName() + "狹路逢。只為當(dāng)初恩義重，放開金鎖走蛟龍。");
    }

}

public class ZhaoYun extends General {
    @Override
    public String getName() {
        return "趙云";
    }

    @Override
    public int getForce() {
        return 95;
    }
}

public class ZhangFei extends General {
    @Override
    public String getName() {
        return "張飛";
    }

    @Override
    public int getForce() {
        return 97;
    }
}

public class GuanYu extends General {
    @Override
    public String getName() {
        return "關(guān)羽";
    }

    @Override
    public int getForce() {
        return 100;
    }
}

ZhaoYun zhaoYun = new ZhaoYun();
ZhangFei zhangFei = new ZhangFei();
GuanYu guanYu = new GuanYu();

zhaoYun.nextGeneral = zhangFei;
zhangFei.nextGeneral = guanYu;

zhaoYun.tryCaoCao(99);