Java设计模式之桥梁（Bridge）模式

abstract public class Abstraction {
	protected Implementor imp;
	/**
	 * 某个商业方法
	 */
	public void operation() {
		imp.operationImp();
	}
}

public class RefinedAbstraction extends Abstraction {
	/**
	 * 某个商业方法在修正抽象化角色的实现
	 */
	public void operation() {
		// improved logic
	}
}

abstract public class Implementor {
	/**
	 * 某个商业方法的实现化声明
	 */
	public abstract void operationImp();
}

public class ConcreteImplementorA extends Implementor {
	/**
	 * 某个商业方法的实现化实现
	 */
	public void operationImp() {
		System.out.println("Do something...");
	}
}

abstract public class Airplane {
	protected AirplaneMaker airplaneMaker;
	abstract public void fly();
	
	protected Airplane(AirplaneMaker airplaneMaker) {
		this.airplaneMaker = airplaneMaker;
	}
}

public class PassengerPlane extends Airplane {
	public void fly() {
		// Write your code here
		airplaneMaker.produce();
	}
	
	public PassengerPlane(AirplaneMaker airplaneMaker) {
		super(airplaneMaker);
	}
}

public class CargoPlane extends Airplane {
	public void fly() {
		// Write your code here
		airplaneMaker.produce();
	}
	
	public CargoPlane(AirplaneMaker airplaneMaker) {
		super(airplaneMaker);
	}
}

abstract public class AirplaneMaker {
	abstract public void produce();
}

public class Airbus extends AirplaneMaker {
	public void produce() {
		// Write your code here
		System.out.println("produce by Airbus");
	}
}

public class Boeing extends AirplaneMaker {
	public void produce() {
		// Write your code here
		System.out.println("produce by Boeing");
	}
}

public class MD extends AirplaneMaker {
	public void produce() {
		// Write your code here
		System.out.println("produce by MD");
	}
}

public class BridgePatternDemo {
	public static void main(String[] args) {
		Airplane mdPassengerPlane = new PassengerPlane(new MD());
		Airplane mdCargoPlane = new CargoPlane(new MD());		
		mdPassengerPlane.fly();
		mdCargoPlane.fly();
		
		Airplane boeingPassengerPlane = new PassengerPlane(new Boeing());
		Airplane boeingCargoPlane = new CargoPlane(new Boeing());
		boeingPassengerPlane.fly();
		boeingCargoPlane.fly();
	}
}