Matlab桥接模式 - sw-lab

来源：cnblogs　　作者：sw-lab　　时间：2019/6/14 9:41:28　　对本文有异议

桥接模式（Bridge)是一种结构型设计模式。它是用组合关系代替继承关系来实现，可以处理多维度变化的场景(https://blog.csdn.net/qq_31156277/article/details/80659537)。它的主要特点是把抽象(Abstraction)与行为实现(Implementation)分离开来，从而可以保持各部分的独立性以及应对他们的功能扩展。

桥接模式的UML图如下：

?Implementor.m

classdef Implementor < handle
    methods(Abstract)
        operation(~);
    end
end

ConcreateImplementorA.m

classdef ConcreateImplementorA < Implementor
    methods
        function operation(~)
            disp("this is concreteImplementorA's operation...");
        end
    end
end

ConcreateImplementorB.m

classdef ConcreateImplementorB < Implementor
    methods
        function operation(~)
            disp("this is concreteImplementorA's operation...");
        end
    end
end

Abstraction.m

classdef Abstraction < handle
    properties
        implementor
    end
    methods
        function imp = getImplementor(obj)
            imp = obj.implementor;
        end
        function setImplementor(obj,imp)
            obj.implementor = imp;
        end
        function operation(obj)
            obj.implementor.operation();
        end
    end
end

RefinedAbstraction.m

classdef RefinedAbstraction < Abstraction
    methods
        function operation(obj)
            disp("this is RefinedAbstraction...")
            operation@Abstraction(obj);
        end
    end
end

测试代码：

abstraction = RefinedAbstraction();
abstraction.setImplementor(ConcreateImplementorA());
abstraction.operation();
abstraction.setImplementor(ConcreateImplementorB());
abstraction.operation();