/** + + +- * @cfg {String} totalRecords The DomQuery path from which to retrieve the total number of records + * @cfg {String} totalProperty The DomQuery path from which to retrieve the total number of records * in the dataset. This is only needed if the whole dataset is not passed in one go, but is being * paged from the remote server. * @cfg {String} record The DomQuery path to the repeated element which contains record information. - * @cfg {String} success The DomQuery path to the success attribute used by forms. + * @cfg {String} record The DomQuery path to the repeated element which contains record information. + * @cfg {String} successProperty The DomQuery path to the success attribute used by forms. * @cfg {String} idPath The DomQuery path relative from the record element to the element that contains * a record identifier value. * @constructor @@ -57,6 +65,10 @@ var myReader = new Ext.data.XmlReader({ */ Ext.data.XmlReader = function(meta, recordType){ meta = meta || {}; + + // backwards compat, convert idPath to idProperty + meta.idProperty = meta.idProperty || meta.idPath; + Ext.data.XmlReader.superclass.constructor.call(this, meta, recordType || meta.fields); }; Ext.extend(Ext.data.XmlReader, Ext.data.DataReader, { @@ -87,36 +99,22 @@ Ext.extend(Ext.data.XmlReader, Ext.data.DataReader, { * @type XMLDocument */ this.xmlData = doc; - var root = doc.documentElement || doc; - var q = Ext.DomQuery; - var recordType = this.recordType, fields = recordType.prototype.fields; - var sid = this.meta.idPath || this.meta.id; - var totalRecords = 0, success = true; - if(this.meta.totalRecords){ - totalRecords = q.selectNumber(this.meta.totalRecords, root, 0); - } - if(this.meta.success){ - var sv = q.selectValue(this.meta.success, root, true); - success = sv !== false && sv !== 'false'; + var root = doc.documentElement || doc, + q = Ext.DomQuery, + totalRecords = 0, + success = true; + + if(this.meta.totalProperty){ + totalRecords = this.getTotal(root, 0); } - var records = []; - var ns = q.select(this.meta.record, root); - for(var i = 0, len = ns.length; i < len; i++) { - var n = ns[i]; - var values = {}; - var id = sid ? q.selectValue(sid, n) : undefined; - for(var j = 0, jlen = fields.length; j < jlen; j++){ - var f = fields.items[j]; - var v = q.selectValue(Ext.value(f.mapping, f.name, true), n, f.defaultValue); - v = f.convert(v, n); - values[f.name] = v; - } - var record = new recordType(values, id); - record.node = n; - records[records.length] = record; + if(this.meta.successProperty){ + success = this.getSuccess(root); } + var records = this.extractData(q.select(this.meta.record, root), true); // <-- true to return Ext.data.Record[] + + // TODO return Ext.data.Response instance. @see #readResponse return { success : success, records : records, @@ -124,8 +122,167 @@ Ext.extend(Ext.data.XmlReader, Ext.data.DataReader, { }; }, - // TODO: implement readResponse for XmlReader - readResponse : Ext.emptyFn -}); - + /** + * Decode a json response from server. + * @param {String} action [{@link Ext.data.Api#actions} create|read|update|destroy] + * @param {Ext.data.Response} response Returns an instance of {@link Ext.data.Response} + */ + readResponse : function(action, response) { + var q = Ext.DomQuery, + doc = response.responseXML; + + var res = new Ext.data.Response({ + action: action, + success : this.getSuccess(doc), + message: this.getMessage(doc), + data: this.extractData(q.select(this.meta.record, doc) || q.select(this.meta.root, doc)), + raw: doc + }); + + if (Ext.isEmpty(res.success)) { + throw new Ext.data.DataReader.Error('successProperty-response', this.meta.successProperty); + } + + if (action === Ext.data.Api.actions.create) { + var def = Ext.isDefined(res.data); + if (def && Ext.isEmpty(res.data)) { + throw new Ext.data.JsonReader.Error('root-empty', this.meta.root); + } + else if (!def) { + throw new Ext.data.JsonReader.Error('root-undefined-response', this.meta.root); + } + } + return res; + }, + + getSuccess : function() { + return true; + }, + + /** + * build response-data extractor functions. + * @private + * @ignore + */ + buildExtractors : function() { + if(this.ef){ + return; + } + var s = this.meta, + Record = this.recordType, + f = Record.prototype.fields, + fi = f.items, + fl = f.length; + + if(s.totalProperty) { + this.getTotal = this.createAccessor(s.totalProperty); + } + if(s.successProperty) { + this.getSuccess = this.createAccessor(s.successProperty); + } + if (s.messageProperty) { + this.getMessage = this.createAccessor(s.messageProperty); + } + this.getRoot = function(res) { + return (!Ext.isEmpty(res[this.meta.record])) ? res[this.meta.record] : res[this.meta.root]; + } + if (s.idPath || s.idProperty) { + var g = this.createAccessor(s.idPath || s.idProperty); + this.getId = function(rec) { + var id = g(rec) || rec.id; + return (id === undefined || id === '') ? null : id; + }; + } else { + this.getId = function(){return null;}; + } + var ef = []; + for(var i = 0; i < fl; i++){ + f = fi[i]; + var map = (f.mapping !== undefined && f.mapping !== null) ? f.mapping : f.name; + ef.push(this.createAccessor(map)); + } + this.ef = ef; + }, + + /** + * Creates a function to return some particular key of data from a response. + * @param {String} key + * @return {Function} + * @private + * @ignore + */ + createAccessor : function(){ + var q = Ext.DomQuery; + return function(key) { + switch(key) { + case this.meta.totalProperty: + return function(root, def){ + return q.selectNumber(key, root, def); + } + break; + case this.meta.successProperty: + return function(root, def) { + var sv = q.selectValue(key, root, true); + var success = sv !== false && sv !== 'false'; + return success; + } + break; + default: + return function(root, def) { + return q.selectValue(key, root, def); + } + break; + } + }; + }(), + + /** + * Extracts rows of record-data from server. iterates and calls #extractValues + * TODO I don't care much for method-names of #extractData, #extractValues. + * @param {Array} root + * @param {Boolean} returnRecords When true, will return instances of Ext.data.Record; otherwise just hashes. + * @private + * @ignore + */ + extractData : function(root, returnRecords) { + var Record = this.recordType, + records = [], + f = Record.prototype.fields, + fi = f.items, + fl = f.length; + if (returnRecords === true) { + for (var i = 0, len = root.length; i < len; i++) { + var data = root[i], + record = new Record(this.extractValues(data, fi, fl), this.getId(data)); + + record.node = data; + records.push(record); + } + } else { + for (var i = 0, len = root.length; i < len; i++) { + records.push(this.extractValues(root[i], fi, fl)); + } + } + return records; + }, + + /** + * extracts values and type-casts a row of data from server, extracted by #extractData + * @param {Hash} data + * @param {Ext.data.Field[]} items + * @param {Number} len + * @private + * @ignore + */ + extractValues : function(data, items, len) { + var f, values = {}; + for(var j = 0; j < len; j++){ + f = items[j]; + var v = this.ef[j](data); + values[f.name] = f.convert((v !== undefined) ? v : f.defaultValue, data); + } + return values; + } +}); + \ No newline at end of fileThe source code + + + + +/*! + * Ext JS Library 3.0.3 + * Copyright(c) 2006-2009 Ext JS, LLC + * licensing@extjs.com + * http://www.extjs.com/license + */ +/** * @class Ext.data.XmlReader * @extends Ext.data.DataReader **Data reader class to create an Array of {@link Ext.data.Record} objects from an XML document @@ -19,9 +25,10 @@ var Employee = Ext.data.Record.create([ {name: 'occupation'} // This field will use "occupation" as the mapping. ]); var myReader = new Ext.data.XmlReader({ - totalRecords: "results", // The element which contains the total dataset size (optional) + totalProperty: "results", // The element which contains the total dataset size (optional) record: "row", // The repeated element which contains row information - id: "id" // The element within the row that provides an ID for the record (optional) + idProperty: "id" // The element within the row that provides an ID for the record (optional) + messageProperty: "msg" // The element within the response that provides a user-feedback message (optional) }, Employee);
@@ -42,11 +49,12 @@ var myReader = new Ext.data.XmlReader({ </row> </dataset>