3 * Copyright(c) 2006-2010 Sencha Inc.
5 * http://www.sencha.com/license
8 * @class Ext.data.MemoryProxy
9 * @extends Ext.data.DataProxy
10 * An implementation of Ext.data.DataProxy that simply passes the data specified in its constructor
11 * to the Reader when its load method is called.
13 * @param {Object} data The data object which the Reader uses to construct a block of Ext.data.Records.
15 Ext.data.MemoryProxy = function(data){
16 // Must define a dummy api with "read" action to satisfy DataProxy#doRequest and Ext.data.Api#prepare *before* calling super
18 api[Ext.data.Api.actions.read] = true;
19 Ext.data.MemoryProxy.superclass.constructor.call(this, {
25 Ext.extend(Ext.data.MemoryProxy, Ext.data.DataProxy, {
27 * @event loadexception
28 * Fires if an exception occurs in the Proxy during data loading. Note that this event is also relayed
29 * through {@link Ext.data.Store}, so you can listen for it directly on any Store instance.
30 * @param {Object} this
31 * @param {Object} arg The callback's arg object passed to the {@link #load} function
32 * @param {Object} null This parameter does not apply and will always be null for MemoryProxy
33 * @param {Error} e The JavaScript Error object caught if the configured Reader could not read the data
37 * MemoryProxy implementation of DataProxy#doRequest
38 * @param {String} action
39 * @param {Ext.data.Record/Ext.data.Record[]} rs If action is load, rs will be null
40 * @param {Object} params An object containing properties which are to be used as HTTP parameters
41 * for the request to the remote server.
42 * @param {Ext.data.DataReader} reader The Reader object which converts the data
43 * object into a block of Ext.data.Records.
44 * @param {Function} callback The function into which to pass the block of Ext.data.Records.
45 * The function must be passed <ul>
46 * <li>The Record block object</li>
47 * <li>The "arg" argument from the load function</li>
48 * <li>A boolean success indicator</li>
50 * @param {Object} scope The scope (<code>this</code> reference) in which the callback function is executed. Defaults to the browser window.
51 * @param {Object} arg An optional argument which is passed to the callback as its second parameter.
53 doRequest : function(action, rs, params, reader, callback, scope, arg) {
54 // No implementation for CRUD in MemoryProxy. Assumes all actions are 'load'
55 params = params || {};
58 result = reader.readRecords(this.data);
60 // @deprecated loadexception
61 this.fireEvent("loadexception", this, null, arg, e);
63 this.fireEvent('exception', this, 'response', action, arg, null, e);
64 callback.call(scope, null, arg, false);
67 callback.call(scope, result, arg, true);