JS简单AOP实现(转）

麦奏 — Wed, 11 Apr 2007 07:32:00 GMT

1    1. <script>
2    2.
3    3.     function Test(){
4    4.         this.say1 =  function(s){
5    5.             alert(s);
6    6.         }
7    7.         this.say2 =  function(s){
8    8.             alert(s);
9    9.         }
10   10.     }
11   11.
12   12.     function actsAsAspect(object) {
13   13.       object.yield = null;
14   14.       object.rv    = { };
15   15.       object.before  = function(method, f) {
16   16.         var original = eval("this." + method);
17   17.         this[method] = function() {
18   18.           f.apply(this, arguments);
19   19.           return original.apply(this, arguments);
20   20.         };
21   21.       };
22   22.       object.after   = function(method, f) {
23   23.         var original = eval("this." + method);
24   24.         this[method] = function() {
25   25.           this.rv[method] = original.apply(this, arguments);
26   26.           return f.apply(this, arguments);
27   27.         }
28   28.       };
29   29.       object.around  = function(method, f) {
30   30.         var original = eval("this." + method);
31   31.         this[method] = function() {
32   32.           this.yield = original;
33   33.           return f.apply(this, arguments);
34   34.         }
35   35.       };
36   36.     }
37   37.
38   38.     function beforeHander(s){
39   39.         alert("aspect said:");
40   40.     }
41   41.     function afterHander(s){
42   42.         alert("said by aspect");
43   43.     }
44   44.
45   45.     var t = new Test();
46   46.     actsAsAspect(t);
47   47.     t.before("say1",beforeHander);
48   48.     t.after("say2",afterHander);
49   49.
50   50.     test = function(){
51   51.         t.say1("hello1");
52   52.         t.say2("hello2");
53   53.     }
54   54.     test();
55   55. script>

麦奏 2007-04-11 15:32 发表评论

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JS简单AOP实现(转）