3 * Copyright(c) 2006-2009 Ext JS, LLC
5 * http://www.extjs.com/license
8 * @class Ext.data.MemoryProxy
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9 * @extends Ext.data.DataProxy
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10 * An implementation of Ext.data.DataProxy that simply passes the data specified in its constructor
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11 * to the Reader when its load method is called.
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13 * @param {Object} data The data object which the Reader uses to construct a block of Ext.data.Records.
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15 Ext.data.MemoryProxy = function(data){
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16 // Must define a dummy api with "read" action to satisfy DataProxy#doRequest and Ext.data.Api#prepare *before* calling super
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18 api[Ext.data.Api.actions.read] = true;
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19 Ext.data.MemoryProxy.superclass.constructor.call(this, {
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25 Ext.extend(Ext.data.MemoryProxy, Ext.data.DataProxy, {
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27 * @event loadexception
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28 * Fires if an exception occurs in the Proxy during data loading. Note that this event is also relayed
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29 * through {@link Ext.data.Store}, so you can listen for it directly on any Store instance.
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30 * @param {Object} this
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31 * @param {Object} arg The callback's arg object passed to the {@link #load} function
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32 * @param {Object} null This parameter does not apply and will always be null for MemoryProxy
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33 * @param {Error} e The JavaScript Error object caught if the configured Reader could not read the data
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37 * MemoryProxy implementation of DataProxy#doRequest
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38 * @param {String} action
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39 * @param {Ext.data.Record/Ext.data.Record[]} rs If action is load, rs will be null
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40 * @param {Object} params An object containing properties which are to be used as HTTP parameters
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41 * for the request to the remote server.
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42 * @param {Ext.data.DataReader} reader The Reader object which converts the data
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43 * object into a block of Ext.data.Records.
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44 * @param {Function} callback The function into which to pass the block of Ext.data.Records.
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45 * The function must be passed <ul>
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46 * <li>The Record block object</li>
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47 * <li>The "arg" argument from the load function</li>
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48 * <li>A boolean success indicator</li>
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50 * @param {Object} scope The scope in which to call the callback
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51 * @param {Object} arg An optional argument which is passed to the callback as its second parameter.
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53 doRequest : function(action, rs, params, reader, callback, scope, arg) {
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54 // No implementation for CRUD in MemoryProxy. Assumes all actions are 'load'
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55 params = params || {};
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58 result = reader.readRecords(this.data);
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60 // @deprecated loadexception
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61 this.fireEvent("loadexception", this, null, arg, e);
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63 this.fireEvent('exception', this, 'response', action, arg, null, e);
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64 callback.call(scope, null, arg, false);
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67 callback.call(scope, result, arg, true);
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