/**
 * 定義電梯行為：打開、關(guān)閉、運(yùn)行、停止
 */
public abstract class LiftState {
    // 擁有一個(gè)電梯對(duì)象，用于更新電梯當(dāng)前狀態(tài)
    protected Lift mLift;
    /**
     * 通過(guò)構(gòu)造函數(shù)引入電梯的實(shí)例化對(duì)象
     *
     * @param lift
     */
    public LiftState(Lift lift) {
        this.mLift = lift;
    }
    /**
     * 行為：打開電梯門
     */
    public abstract void open();
    /**
     * 行為：關(guān)閉電梯門
     */
    public abstract void close();
    /**
     * 行為：電梯運(yùn)行
     */
    public abstract void run();
    /**
     * 行為：電梯停止運(yùn)行
     */
    public abstract void stop();
}

public class OpeningState extends LiftState {
    public OpeningState(Lift lift) {
        super(lift);
    }
    @Override
    public void open() {
        // 執(zhí)行開門動(dòng)作
        System.out.println("執(zhí)行開門動(dòng)作");
    }
    @Override
    public void close() {
        // 執(zhí)行關(guān)門動(dòng)作
        // 1、轉(zhuǎn)化為關(guān)門狀態(tài)
        mLift.setState(mLift.getCloseingState());
        // 2、關(guān)門
        mLift.close();
    }
    @Override
    public void run() {
        // do noting
        // 開門狀態(tài)，不能執(zhí)行運(yùn)行動(dòng)作
    }
    @Override
    public void stop() {
        // do noting
        // 開門狀態(tài)下，不執(zhí)行停止動(dòng)作
    }
}

public class ClosingState extends LiftState {
    public ClosingState(Lift lift) {
        super(lift);
    }
    @Override
    public void open() {
        // 執(zhí)行開門動(dòng)作
        // 1、變化為開門狀態(tài)
        this.mLift.setState(mLift.getOpenningState());
        // 2、開門
        this.mLift.open();
    }
    @Override
    public void close() {
        System.out.println("執(zhí)行關(guān)門動(dòng)作");
    }
    @Override
    public void run() {
        // 運(yùn)行動(dòng)作
        // 1、運(yùn)行狀態(tài)
        this.mLift.setState(mLift.getRunningState());
        // 2、運(yùn)行動(dòng)作
        this.mLift.run();
    }
    @Override
    public void stop() {
        // 停止動(dòng)作
        // 1、轉(zhuǎn)化為停止?fàn)顟B(tài)
        this.mLift.setState(mLift.getStoppingState());
        // 2、停止
        this.mLift.stop();
    }
}

public class RunningState extends LiftState {
    public RunningState(Lift lift) {
        super(lift);
    }
    @Override
    public void open() {
        // do noting
    }
    @Override
    public void close() {
        // do noting
    }
    @Override
    public void run() {
        // 運(yùn)行動(dòng)作
        System.out.println("電梯上下運(yùn)行中...");
    }
    @Override
    public void stop() {
        // 停止動(dòng)作
        // 1、轉(zhuǎn)化為停止?fàn)顟B(tài)
        this.mLift.setState(mLift.getStoppingState());
        // 2、停止動(dòng)作
        this.mLift.stop();
    }
}

public class StoppingState extends LiftState {
    public StoppingState(Lift lift) {
        super(lift);
    }
    @Override
    public void open() {
        // 開門動(dòng)作
        // 1、開門狀態(tài)
        this.mLift.setState(mLift.getOpenningState());
        // 2、執(zhí)行開門動(dòng)作
        this.mLift.open();
    }
    @Override
    public void close() {
        // do noting
    }
    @Override
    public void run() {
        // 運(yùn)行動(dòng)作
        // 1、運(yùn)行狀態(tài)
        this.mLift.setState(mLift.getRunningState());
        // 2、運(yùn)行動(dòng)作
        this.mLift.run();
    }
    @Override
    public void stop() {
        // 電梯停止動(dòng)作
        System.out.println("電梯停止運(yùn)行...");
    }
}

/**
 * 定義電梯類
 */
public class Lift {
    //定義出電梯的所有狀態(tài)
    private LiftState openningState;
    private LiftState closingState;
    private LiftState runningState;
    private LiftState stoppingState;
    // 定義當(dāng)前電梯狀態(tài)
    private LiftState mCurState;
    /**
     * 構(gòu)造方法
     */
    public Lift() {
        openningState = new OpeningState(this);
        closingState = new ClosingState(this);
        runningState = new RunningState(this);
        stoppingState = new StoppingState(this);
    }
    /**
     * 執(zhí)行開門動(dòng)作
     */
    public void open() {
        mCurState.open();
    }
    /**
     * 執(zhí)行關(guān)門動(dòng)作
     */
    public void close() {
        mCurState.close();
    }
    /**
     * 執(zhí)行運(yùn)行動(dòng)作
     */
    public void run() {
        mCurState.run();
    }
    /**
     * 執(zhí)行停止動(dòng)作
     */
    public void stop() {
        mCurState.stop();
    }
    // ##################設(shè)置當(dāng)前電梯狀態(tài)#####################
    /**
     * 設(shè)置當(dāng)前電梯狀態(tài)
     *
     * @param state
     */
    public void setState(LiftState state) {
        this.mCurState = state;
    }
    // ###################獲取電梯的全部狀態(tài)####################
    public LiftState getOpenningState() {
        return openningState;
    }
    public LiftState getCloseingState() {
        return closingState;
    }
    public LiftState getRunningState() {
        return runningState;
    }
    public LiftState getStoppingState() {
        return stoppingState;
    }
}

public static void main(String[] args) {
        Lift lift = new Lift();
        lift.setState(new ClosingState(lift));
        lift.open();
        lift.close();
        lift.run();
        lift.stop();
    }