www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/data/MemoryProxy.js
/* * Ext JS Library 2.0.2 * Copyright(c) 2006-2008, Ext JS, LLC. * licensing@extjs.com * * http://extjs.com/license */ /** * @class Ext.data.MemoryProxy * @extends Ext.data.DataProxy * An implementation of Ext.data.DataProxy that simply passes the data specified in its constructor * to the Reader when its load method is called. * @constructor * @param {Object} data The data object which the Reader uses to construct a block of Ext.data.Records. */ Ext.data.MemoryProxy = function(data){ Ext.data.MemoryProxy.superclass.constructor.call(this); this.data = data; }; Ext.extend(Ext.data.MemoryProxy, Ext.data.DataProxy, { /** * Load data from the requested source (in this case an in-memory * data object passed to the constructor), read the data object into * a block of Ext.data.Records using the passed Ext.data.DataReader implementation, and * process that block using the passed callback. * @param {Object} params This parameter is not used by the MemoryProxy class. * @param {Ext.data.DataReader) reader The Reader object which converts the data * object into a block of Ext.data.Records. * @param {Function} callback The function into which to pass the block of Ext.data.records. * The function must be passed <ul> * <li>The Record block object</li> * <li>The "arg" argument from the load function</li> * <li>A boolean success indicator</li> * </ul> * @param {Object} scope The scope in which to call the callback * @param {Object} arg An optional argument which is passed to the callback as its second parameter. */ load : function(params, reader, callback, scope, arg){ params = params || {}; var result; try { result = reader.readRecords(this.data); }catch(e){ this.fireEvent("loadexception", this, arg, null, e); callback.call(scope, null, arg, false); return; } callback.call(scope, result, arg, true); }, // private update : function(params, records){ } });