MemoryProxy.js
资源名称:ext-3.1.0.zip [点击查看]
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上传日期:2022-08-06
资源大小:9345k
文件大小:3k
源码类别:
JavaScript
开发平台:
JavaScript
- /*! * Ext JS Library 3.1.0 * Copyright(c) 2006-2009 Ext JS, LLC * licensing@extjs.com * http://www.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){
- // Must define a dummy api with "read" action to satisfy DataProxy#doRequest and Ext.data.Api#prepare *before* calling super
- var api = {};
- api[Ext.data.Api.actions.read] = true;
- Ext.data.MemoryProxy.superclass.constructor.call(this, {
- api: api
- });
- this.data = data;
- };
- Ext.extend(Ext.data.MemoryProxy, Ext.data.DataProxy, {
- /**
- * @event loadexception
- * Fires if an exception occurs in the Proxy during data loading. Note that this event is also relayed
- * through {@link Ext.data.Store}, so you can listen for it directly on any Store instance.
- * @param {Object} this
- * @param {Object} arg The callback's arg object passed to the {@link #load} function
- * @param {Object} null This parameter does not apply and will always be null for MemoryProxy
- * @param {Error} e The JavaScript Error object caught if the configured Reader could not read the data
- */
- /**
- * MemoryProxy implementation of DataProxy#doRequest
- * @param {String} action
- * @param {Ext.data.Record/Ext.data.Record[]} rs If action is load, rs will be null
- * @param {Object} params An object containing properties which are to be used as HTTP parameters
- * for the request to the remote server.
- * @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 (<code>this</code> reference) in which the callback function is executed. Defaults to the browser window.
- * @param {Object} arg An optional argument which is passed to the callback as its second parameter.
- */
- doRequest : function(action, rs, params, reader, callback, scope, arg) {
- // No implementation for CRUD in MemoryProxy. Assumes all actions are 'load'
- params = params || {};
- var result;
- try {
- result = reader.readRecords(this.data);
- }catch(e){
- // @deprecated loadexception
- this.fireEvent("loadexception", this, null, arg, e);
- this.fireEvent('exception', this, 'response', action, arg, null, e);
- callback.call(scope, null, arg, false);
- return;
- }
- callback.call(scope, result, arg, true);
- }
- });