php设计模式 Bridge (桥接模式)

简介：这是php设计模式 Bridge (桥接模式)的详细页面，介绍了和php,有关的知识、技巧、经验，和一些php源码等。

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1 <?php
2 /**
3  * 桥接模式
4  *
5  * 将抽象部份与它实现部分分离,使用它们都可以有独立的变化
6  */
7 abstract class Implementor
8 {
9     abstract public function operation();
10 }
11
12 class ConcreteImplementorA extends Implementor
13 {
14     public function operation()
15     {
16         echo "ConcreteImplementorA Operation<br/>";
17     }
18 }
19
20 class ConcreteImplementorB extends Implementor
21 {
22     public function operation()
23     {
24         echo "ConcreteImplementorB Operation<br/>";
25     }
26 }
27
28 class Abstraction
29 {
30     protected $_implementor = null;
31
32     public function setImplementor($implementor)
33     {
34         $this->_implementor = $implementor;
35     }
36
37     public function operation()
38     {
39         $this->_implementor->operation();
40     }
41 }
42
43 class RefinedAbstraction extends Abstraction
44 {
45 }
46
47 class ExampleAbstraction extends Abstraction
48 {
49 }
50
51 //
52 $objRAbstraction = new RefinedAbstraction();
53 $objRAbstraction->setImplementor(new ConcreteImplementorB());
54 $objRAbstraction->operation();
55
56 $objRAbstraction->setImplementor(new ConcreteImplementorA());
57 $objRAbstraction->operation();
58
59 $objEAbstraction = new ExampleAbstraction();
60 $objEAbstraction->setImplementor(new ConcreteImplementorB());
61 $objEAbstraction->operation();

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