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JS对象命名空间管理器
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| /** | |
| * Date 2012.7.26 | |
| * @param {Object} opt_ns 命名空间 | |
| * @para {DOMWindow} opt_wind 浏览器BOM window | |
| */ | |
| (function(opt_ns , opt_wind){ | |
| var g_win = opt_wind || top ; | |
| var g_doc = g_win.document ; | |
| var toString = Object.prototype.toString ; | |
| //非空字符串判断 | |
| function isStringAndNotEmpty(value){ | |
| return toString.call(value) === '[object String]' && !/^\s+$/.test(value) ; | |
| } | |
| var namespace = { | |
| /** | |
| * 命名空间实现的记录 | |
| */ | |
| implementNs:{}, | |
| /** | |
| * 判断是否一存在该命名空间 | |
| * @param {Object} namespace 命名空间的路径名,如 app.view.button | |
| */ | |
| _isExsited:function(namespace){ | |
| if(this.implementNs[namespace]){ | |
| return true ; | |
| }else{ | |
| return false ; | |
| } | |
| }, | |
| /** | |
| * 创建指定的命名空间，并将opt_object挂载到最后的路径下 | |
| * @param {Object} namespace 命名空间路径 "a.b.c" | |
| * @param {Object} opt_object 可选对象 ，挂载到命名空间的末尾 | |
| * @param {Object} opt_objectToExportTo 命名空间的目标对象，默认为window | |
| */ | |
| create:function(namespace, opt_object){ | |
| if (typeof namespace !== "string") { | |
| throw new Error("ns.create error : Namespace not a string"); | |
| return ; | |
| }else if(this._isExsited(namespace)){ | |
| throw new Error("ns.create error : Namespace exist"); | |
| return ; | |
| }else { | |
| var currentObj = g_win; | |
| var tmplns = namespace; | |
| while((tmplns = tmplns.substring(0 , tmplns.lastIndexOf(".")))){ | |
| if(this.getObjByNs(tmplns)){ | |
| break ; | |
| } | |
| this.implementNs[tmplns] = true ; | |
| } | |
| //export | |
| var names = namespace.split("."); | |
| var length = names.length; | |
| for (var i = 0; i < length; i++) { | |
| if (i == length - 1 && opt_object) { | |
| currentObj[names[i]] = opt_object; | |
| }else if (currentObj[names[i]]) { | |
| currentObj = currentObj[names[i]]; | |
| }else { | |
| currentObj = currentObj[names[i]] = {}; | |
| } | |
| } | |
| return currentObj; | |
| } | |
| }, | |
| /** | |
| * 获取指定命名空间对象 | |
| * @param {Object} namespace 命名空间路径 | |
| * @param {Object} opt_srcObj | |
| */ | |
| getObjByNs:function(namespace , opt_srcObj){ | |
| if( !isStringAndNotEmpty(namespace) ){ | |
| return null ; | |
| }else{ | |
| var cur = opt_srcObj || g_win ; | |
| var ns = namespace.split(".") ; | |
| for(var length = ns.length , i = 0 ;i < length ; i++){ | |
| if(cur[ns[i]] !== null){ | |
| cur = cur[ns[i]] | |
| }else{ | |
| return null ; | |
| } | |
| } | |
| return cur; | |
| } | |
| } | |
| } | |
| opt_ns = opt_ns || g_win; | |
| opt_ns.ns = opt_ns.namespace = namespace ; | |
| })(undefined , window) |
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| <!DOCTYPE html"> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> | |
| <title>ns Test</title> | |
| <script src="ns.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var appViewReturned = ns.create("app.view"); | |
| appViewReturned.id = 'uid' ; | |
| var appViewGeted = ns.getObjByNs("app.view"); | |
| console.log(appViewGeted.id); // output : uid | |
| //ns.create("app"); | |
| </script> | |
| </body> |
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