67 lines
2.6 KiB
JavaScript
67 lines
2.6 KiB
JavaScript
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/*
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* Ext JS Library 2.3.0
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* Copyright(c) 2006-2009, Ext JS, LLC.
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* licensing@extjs.com
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*
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* http://extjs.com/license
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*/
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/**
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* @class Ext.data.MemoryProxy
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* @extends Ext.data.DataProxy
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* An implementation of Ext.data.DataProxy that simply passes the data specified in its constructor
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* to the Reader when its load method is called.
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* @constructor
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* @param {Object} data The data object which the Reader uses to construct a block of Ext.data.Records.
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*/
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Ext.data.MemoryProxy = function(data){
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Ext.data.MemoryProxy.superclass.constructor.call(this);
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this.data = data;
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};
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Ext.extend(Ext.data.MemoryProxy, Ext.data.DataProxy, {
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/**
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* @event loadexception
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* Fires if an exception occurs in the Proxy during data loading. Note that this event is also relayed
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* through {@link Ext.data.Store}, so you can listen for it directly on any Store instance.
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* @param {Object} this
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* @param {Object} arg The callback's arg object passed to the {@link #load} function
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* @param {Object} null This parameter does not apply and will always be null for MemoryProxy
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* @param {Error} e The JavaScript Error object caught if the configured Reader could not read the data
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*/
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/**
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* Load data from the requested source (in this case an in-memory
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* data object passed to the constructor), read the data object into
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* a block of Ext.data.Records using the passed Ext.data.DataReader implementation, and
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* process that block using the passed callback.
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* @param {Object} params This parameter is not used by the MemoryProxy class.
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* @param {Ext.data.DataReader} reader The Reader object which converts the data
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* object into a block of Ext.data.Records.
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* @param {Function} callback The function into which to pass the block of Ext.data.records.
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* The function must be passed <ul>
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* <li>The Record block object</li>
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* <li>The "arg" argument from the load function</li>
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* <li>A boolean success indicator</li>
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* </ul>
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* @param {Object} scope The scope in which to call the callback
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* @param {Object} arg An optional argument which is passed to the callback as its second parameter.
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*/
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load : function(params, reader, callback, scope, arg){
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params = params || {};
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var result;
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try {
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result = reader.readRecords(this.data);
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}catch(e){
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this.fireEvent("loadexception", this, arg, null, e);
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callback.call(scope, null, arg, false);
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return;
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}
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callback.call(scope, result, arg, true);
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},
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// private
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update : function(params, records){
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}
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});
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