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标题党too。
今天打球输了，郁闷。第一次打系列赛以全负战绩结束，丫的。
以后得加强体能训练，下半场眼睁睁地看对方抢篮板。
呃，好像叫上宿舍几个来的更实在些，丫，切了这群小样的。
好了，罚自己洗澡打牌去。
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咳，最大的好处就是不用修改原来的js代码，可以对方法新增一些功能，比如，这个例子中，判断
文件文件是否已经被打开了，即锁定了。enjoy it.
//test.html
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
<script language="JavaScript" src="aopFramework.js"></script>
<script language="JavaScript">
function Documents(){};
Documents.prototype={
_id:0,
_name:'',
name:function(){
return this._name;
},
id:function(){
return this._id;
},
save:function(){
return true;
},
open:function(id){
this._id = id;
this._name = 'test Open';
return true;
}
}
function openDocument(id){
var doc = new Document();
try{
document.open(id);
}
catch(e){
alert(e);
return;
}
alert("Doc id: " + doc.id());
return doc;
}
function Lockable(){}
Lockable.prototype = {
_locked: false,
locked: function() {
return this._locked;
}
}
function lockOnOpen()
{
// Lock this object
// If we didn't succeed
// throw (new Error ("Failed locking " + this._name));
if(this._locked == true){
throw (new Error ("Failed locking " + this._name));
}
// The object is locked
this._locked = true;
alert("locked");
}
function allTest(){
try {
//增加对象的属性，prototype
Aspects.addIntroduction(Lockable, Documents);
//增加对象方法的预处理
Aspects.addBefore(lockOnOpen, Documents, "open");
}
catch(e)
{
alert(e);
}
var doc = new Documents();
try {
doc.open(222);
}
catch(e)
{
alert(e);
}
// Update icons and other user elements affected
alert("Doc id: " + doc.id());
try {
doc.open(222);
}
catch(e)
{
alert(e);
}
// Update icons and other user elements affected
alert("Doc id: " + doc.id());
}
</script>
</head>
<body onload="allTest();">
</body>
</html>
//aopFramework.js
InvalidAspect = new Error("Missing a valid aspect. Aspect is not a function.");
InvalidObject = new Error("Missing valid object or an array of valid objects.");
InvalidMethod = new Error("Missing valid method to apply aspect on.");
Aspects = new Object();
Aspects._addIntroduction = function(intro, obj)
{ for (var m in intro.prototype)
{
obj.prototype[m] = intro.prototype[m];
}
}
Aspects.addIntroduction = function(aspect, objs)
{
var oType = typeof(objs);
if (typeof(aspect) != 'function')
throw(InvalidAspect);
if (oType == 'function')
{
this._addIntroduction(aspect, objs);
}
else if (oType == 'object')
{
for (var n = 0; n < objs.length; n++)
{
this._addIntroduction(aspect, objs[n]);
}
}
else
{
throw InvalidObject;
}
}
Aspects.addBefore = function(aspect, obj, funcs)
{
var fType = typeof(funcs);
if (typeof(aspect) != 'function')
throw(InvalidAspect);
if (fType != 'object')
funcs = Array(funcs);
for (var n = 0; n < funcs.length; n++)
{
var fName = funcs[n];
var old = obj.prototype[fName];
if (!old)
throw InvalidMethod;
obj.prototype[fName] = function() {
aspect.apply(this, arguments);
return old.apply(this, arguments);
}
}
}
Aspects.addAfter = function(aspect, obj, funcs)
{
if (typeof(aspect) != 'function')
throw InvalidAspect;
if (typeof(funcs) != 'object')
funcs = Array(funcs);
for (var n = 0; n < funcs.length; n++)
{
var fName = funcs[n];
var old = obj.prototype[fName];
if (!old)
throw InvalidMethod;
obj.prototype[fName] = function() {
var args = old.apply(this, arguments);
return ret = aspect.apply(this, Array(args, null));
}
}
}
Aspects._getLogic = function(func)
{
var oSrc = new String(func);
var nSrc = '';
var n = 0;
while (oSrc[n])
{
if (oSrc[n] == '\n' || oSrc[n] == '\r')
nSrc[n++] += ' ';
else
nSrc += oSrc[n++];
}
n = 0;
while (nSrc[n++] != '{');
nSrc = nSrc.substring(n, nSrc.length - 1);
return nSrc;
}
Aspects.addAround = function(aspect, obj, funcs)
{
if (typeof(aspect) != 'function')
throw InvalidAspect;
if (typeof(funcs) != 'object')
funcs = Array(funcs);
var aSrc = this._getLogic(aspect);
for (var n = 0; n < funcs.length; n++)
{
var fName = funcs[n];
if (!obj.prototype[fName])
throw InvalidMethod;
var oSrc = 'var original = ' + obj.prototype[fName];
var fSrc = oSrc + aSrc.replace('proceed();',
'original.apply(this, arguments);');
obj.prototype[fName] = Function(fSrc);
}
return true;
} -
呼，需求的重要性阿，nnd。受不了了。事情怎么都是赶到一起了呢。
好吧，深呼吸，“阿，世界多么美好啊~~~~~~”。
btw，我人品问题，用不了沙茶。
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