Current File : /home/jvzmxxx/wiki/extensions/Wikibase/view/resources/wikibase/store/store.CachingEntityStore.js

/**
 * @license GPL-2.0+
 * @author Adrian Heine <adrian.heine@wikimedia.de>
 */
( function( wb ) {
	'use strict';

	var MODULE = wb.store;

	/**
	 * An `EntityStore` decorator, adding a cache.
	 *
	 * @constructor
	 * @extends wikibase.store.EntityStore
	 * @since 0.5
	 *
	 * @param {wikibase.store.EntityStore} store
	 */
	MODULE.CachingEntityStore = util.inherit(
		'WbCachingEntityStore',
		wb.store.EntityStore,
		function( store ) {
			this._deferreds = {};
			this._store = store;
		},
	{
		/**
		 * @type {Object}
		 */
		_deferreds: null,

		/**
		 * @type {wikibase.store.EntityStore}
		 */
		_store: null,

		/**
		 * @see wikibase.store.EntityStore.get
		 */
		get: function( entityId ) {
			if ( !this._deferreds.hasOwnProperty( entityId ) ) {
				this._deferreds[ entityId ] = this._store.get( entityId );
			}
			return this._deferreds[ entityId ];
		}
	} );
}( wikibase ) );