Switch.java

package designpattern.behavioral_pattern.state.v3;

/**
 * <p>Description: 开关类Switch代码</p>
 *
 * @author Cui Kaihui
 * @date 2019/6/24 22:28
 */
public class Switch {
    private static State state, onState, offState; //定义三个静态的状态对象
    private String name;

    public Switch(String name) {
        this.name = name;
        onState = new OnState();
        offState = new OffState();
        this.state = onState;
    }

    public void setState(State state) {
        this.state = state;
    }

    public static State getState(String type) {
        if (type.equalsIgnoreCase("on")) {
            return onState;
        } else {
            return offState;
        }
    }

    //打开开关
    public void on() {
        System.out.print(name);
        state.on(this);
    }

    //关闭开关
    public void off() {
        System.out.print(name);
        state.off(this);
    }

}