!(function () {
    BI.LinkHashMap = function () {
        this.array = [];
        this.map = {};
    };
    BI.LinkHashMap.prototype = {
        constructor: BI.LinkHashMap,
        has: function (key) {
            if (key in this.map) {
                return true;
            }
            return false;
        },

        add: function (key, value) {
            if (typeof key === "undefined") {
                return;
            }
            if (key in this.map) {
                this.map[key] = value;
            } else {
                this.array.push(key);
                this.map[key] = value;
            }
        },

        remove: function (key) {
            if (key in this.map) {
                delete this.map[key];
                for (var i = 0; i < this.array.length; i++) {
                    if (this.array[i] == key) {
                        this.array.splice(i, 1);
                        break;
                    }
                }
            }
        },

        size: function () {
            return this.array.length;
        },

        each: function (fn, scope) {
            var scope = scope || window;
            var fn = fn || null;
            if (fn == null || typeof (fn) !== "function") {
                return;
            }
            for (var i = 0; i < this.array.length; i++) {
                var key = this.array[i];
                var value = this.map[key];
                var re = fn.call(scope, key, value, i, this.array, this.map);
                if (re == false) {
                    break;
                }
            }
        },

        get: function (key) {
            return this.map[key];
        },

        toArray: function () {
            var array = [];
            this.each(function (key, value) {
                array.push(value);
            });
            return array;
        }
    };
})();