JS实现AOP
<script>
function actsAsAspect(obj,handlers) {
if(typeof obj == ‘function‘){
obj = obj.prototype;
}
for(var methodName in handlers){
var _handlers = handlers[methodName];
for(var handler in _handlers){
if((handler == ‘before‘ || handler == ‘after‘)
&& typeof _handlers[handler] ==
‘function‘){
eval_r(handler)(obj,methodName,_handlers[handler]);
}
}
}
function before(obj,method,f) {
var original = obj[method];
obj[method] = function() {
f.apply(this, arguments);
return original.apply(this, arguments);
}
}
function after(obj,method, f) {
var original = obj[method];
obj[method] = function() {
original.apply(this, arguments);
return f.apply(this, arguments);
}
}
}
//actsAsAspect(Test,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});
function
Test(){}
//actsAsAspect(Test,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});
Test.prototype.say2 = function(s){
alert(s);
}
actsAsAspect(Test,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});
var t = new
Test();
//actsAsAspect(t,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});
t.say2("hello2");
</script>
由于新浪的编辑器太差了,把eval_r改成eval就可以运行了
支持对Class 和 Object 两种类型的AOP,前者是基于对prototype的修改,后者是对对象的方法修改