betajs/betajs-data

//Stores everything temporarily in the browser's memory using map

Scoped.define("module:Stores.MemoryMapStore", [
    "module:Stores.AssocStore",
    "base:Iterators.FilteredIterator",
    "base:Iterators.NativeMapIterator",
    "base:Objs"
], function (AssocStore, FilteredIterator, NativeMapIterator, Objs, scoped) {
    return AssocStore.extend({scoped: scoped}, function (inherited) {            
        return {

            constructor: function (options) {
                inherited.constructor.call(this, options);
                this.__map = new Map();
            },

            _read_key: function (key) {
                return this.__map.get(key + "");
            },

            _write_key: function (key, value) {
                this.__map.set(key + "", value);
            },

            _remove_key: function (key) {
                this.__map['delete'](key + "");
            },

            _iterate: function () {
                var nativeMapIter = new NativeMapIterator(this.__map);
                return (new FilteredIterator(nativeMapIter, function (item) {
                    return !!item;
                })).auto_destroy(nativeMapIter, true);
            },
            
            _count: function (query) {
                return query ? inherited._count.call(this, query) : this.__map.size;
            }                        

        };
    });
});