10.桥接模式设计思想

public abstract class Shape {
    public abstract void draw();
}

public class Circle extends Shape {
    @Override
    public void draw() {
        System.out.println("画一个圆形");
    }
}

public class Square extends Shape {
    @Override
    public void draw() {
        System.out.println("画一个正方形");
    }
}

public class Color extends Shape {
    private Shape shape;

    public Color(Shape shape) {
        this.shape = shape;
    }

    @Override
    public void draw() {
        setColor();
        shape.draw();
        resetColor();
    }

    private void setColor() {
        System.out.println("设置颜色");
    }

    private void resetColor() {
        System.out.println("重置颜色");
    }
}

private void test() {
    Shape circle = new Circle();
    Shape square = new Square();
    Shape coloredCircle = new Color(circle);
    Shape coloredSquare = new Color(square);
    coloredCircle.draw();
    coloredSquare.draw();
}

public class PayController {

    /**
     * @param uId         用户id
     * @param tradeId     交易流水号
     * @param amount      交易金额
     * @param channelType 渠道类型 1 微信, 2 支付宝
     * @param modeType    支付模式 1 密码,2 人脸,3 指纹
     * @return: boolean
     */
    public void doPay(String uId, String tradeId, BigDecimal amount, int channelType, int modeType) {
        //微信支付
        if (1 == channelType) {
            System.out.println("微信渠道支付划账开始......");
            if (1 == modeType) {
                System.out.println("密码支付");
            } else if (2 == modeType) {
                System.out.println("人脸支付");
            } else if (3 == modeType) {
                System.out.println("指纹支付");
            }
        }

        //支付宝支付
        if (2 == channelType) {
            System.out.println("支付宝渠道支付划账开始......");
            if (1 == modeType) {
                System.out.println("密码支付");
            } else if (2 == modeType) {
                System.out.println("人脸支付");
            } else if (3 == modeType) {
                System.out.println("指纹支付");
            }
        }
    }
}

private void test1() {
    PayController payController = new PayController();
    System.out.println("测试: 微信支付、人脸支付方式");
    payController.doPay("weixin", "1000112333333", new BigDecimal(100), 1, 2);
    System.out.println("\n测试: 支付宝支付、指纹支付方式");
    payController.doPay("zhifubao", "1000112334567", new BigDecimal(100), 2, 3);
}

/**
 * 支付模式接口
 */
public interface IPayMode {

    //安全校验功能: 对各种支付模式进行风控校验
    boolean security(String uId);
}

/**
 * 密码支付及风控校验
 * 具体实现化（Concrete Implementor）角色
 */
public class PayCypher implements IPayMode {
    @Override
    public boolean security(String uId) {
        return false;
    }
}


/**
 * 刷脸支付及风控校验
 * 具体实现化（Concrete Implementor）角色
 */
public class PayFaceMode implements IPayMode {
    @Override
    public boolean security(String uId) {
        return true;
    }
}

/**
 * 指纹支付及风控校验
 * 具体实现化（Concrete Implementor）角色
 */
public class PayFingerprintMode implements IPayMode {

    @Override
    public boolean security(String uId) {
        return false;
    }
}

/**
 * 支付抽象化类
 * 抽象化（Abstraction）角色
 */
public abstract class Pay {

    protected IPayMode payMode;

    public Pay(IPayMode payMode){
        this.payMode = payMode;
    }

    //划账功能
    public abstract String transfer(String uId, String tradeId, BigDecimal amount);

}

/**
 * 支付渠道-微信
 * 扩展抽象化（RefinedAbstraction）角色
 */
public class WxPay extends Pay{

    public WxPay(IPayMode payMode) {
        super(payMode);
    }

    @Override
    public String transfer(String uId, String tradeId, BigDecimal amount) {
        System.out.println("微信渠道支付划账开始......");

        //支付方式校验
        boolean security = payMode.security(uId);
        System.out.println("微信渠道支付风险校验: " + uId + " , " + tradeId +" , " + security);

        if(!security){
            System.out.println("微信渠道支付划账失败!");
            return "500";
        }

        System.out.println("微信渠道划账成功! 金额: "+ amount);
        return "200";
    }
}


/**
 * 支付渠道--支付宝
 * 扩展抽象化（RefinedAbstraction）角色
 */
public class ZfbPay extends Pay{

    public ZfbPay(IPayMode payMode) {
        super(payMode);
    }

    @Override
    public String transfer(String uId, String tradeId, BigDecimal amount) {
        System.out.println("支付宝渠道支付划账开始......");

        //支付方式校验
        boolean security = payMode.security(uId);
        System.out.println("支付宝渠道支付风险校验: " + uId + " , " + tradeId +" , " + security);

        if(!security){
            System.out.println("支付宝渠道支付划账失败!");
            return "500";
        }

        System.out.println("支付宝渠道划账成功! 金额: "+ amount);
        return "200";
    }
}

private void test1() {
    System.out.println("测试场景1: 微信支付、人脸方式.");
    Pay wxpay = new WxPay(new PayFaceMode());
    wxpay.transfer("weixin","10001900",new BigDecimal(100));

    System.out.println();

    System.out.println("测试场景2: 支付宝支付、指纹方式");
    Pay zfbPay = new ZfbPay(new PayFingerprintMode());
    zfbPay.transfer("zhifubao","567689999999",new BigDecimal(200));
}

// 抽象部分
abstract class Abstraction {
    protected Implementation implementation;

    public void setImplementation(Implementation implementation) {
        this.implementation = implementation;
    }

    public abstract void operation();
}

// 具体部分
class ConcreteAbstraction extends Abstraction {
    @Override
    public void operation() {
        System.out.println("具体操作");
    }
}

// 实现部分
interface Implementation {
    void operationImpl();
}

class ConcreteImplementationA implements Implementation {
    @Override
    public void operationImpl() {
        System.out.println("实现A的操作");
    }
}

class ConcreteImplementationB implements Implementation {
    @Override
    public void operationImpl() {
        System.out.println("实现B的操作");
    }
}

// 客户端代码
private void test() {
    Abstraction abstraction = new ConcreteAbstraction();
    Implementation implementationA = new ConcreteImplementationA();
    Implementation implementationB = new ConcreteImplementationB();

    abstraction.setImplementation(implementationA);
    abstraction.operation(); // 输出：具体操作

    abstraction.setImplementation(implementationB);
    abstraction.operation(); // 输出：具体操作
}

// 接口
interface Shape {
    void draw();
}

// 抽象部分
abstract class AbstractShape {
    protected Shape shape;

    public void setShape(Shape shape) {
        this.shape = shape;
    }

    public abstract void draw();
}

// 具体部分
class Rectangle extends AbstractShape {
    @Override
    public void draw() {
        shape.draw();
    }
}

class Circle extends AbstractShape {
    @Override
    public void draw() {
        shape.draw();
    }
}

// 内部类实现接口
class ShapeImpl implements Shape {
    @Override
    public void draw() {
        System.out.println("绘制形状");
    }
}

// 客户端代码
private void test() {
    AbstractShape abstractShape = new Rectangle();
    Shape shapeA = new ShapeImpl();
    Shape shapeB = new ShapeImpl();

    abstractShape.setShape(shapeA);
    abstractShape.draw(); // 输出：绘制形状

    abstractShape.setShape(shapeB);
    abstractShape.draw(); // 输出：绘制形状
}