+++ /dev/null
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- <title>The source code</title>
- <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
- <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.3.1
- * Copyright(c) 2006-2010 Sencha Inc.
- * licensing@sencha.com
- * http://www.sencha.com/license
- */
-<div id="cls-Ext.data.XmlReader"></div>/**
- * @class Ext.data.XmlReader
- * @extends Ext.data.DataReader
- * <p>Data reader class to create an Array of {@link Ext.data.Record} objects from an XML document
- * based on mappings in a provided {@link Ext.data.Record} constructor.</p>
- * <p><b>Note</b>: that in order for the browser to parse a returned XML document, the Content-Type
- * header in the HTTP response must be set to "text/xml" or "application/xml".</p>
- * <p>Example code:</p>
- * <pre><code>
-var Employee = Ext.data.Record.create([
- {name: 'name', mapping: 'name'}, // "mapping" property not needed if it is the same as "name"
- {name: 'occupation'} // This field will use "occupation" as the mapping.
-]);
-var myReader = new Ext.data.XmlReader({
- totalProperty: "results", // The element which contains the total dataset size (optional)
- record: "row", // The repeated element which contains row information
- 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);
-</code></pre>
- * <p>
- * This would consume an XML file like this:
- * <pre><code>
-<?xml version="1.0" encoding="UTF-8"?>
-<dataset>
- <results>2</results>
- <row>
- <id>1</id>
- <name>Bill</name>
- <occupation>Gardener</occupation>
- </row>
- <row>
- <id>2</id>
- <name>Ben</name>
- <occupation>Horticulturalist</occupation>
- </row>
-</dataset>
-</code></pre>
- * @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} 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
- * Create a new XmlReader.
- * @param {Object} meta Metadata configuration options
- * @param {Object} recordType Either an Array of field definition objects as passed to
- * {@link Ext.data.Record#create}, or a Record constructor object created using {@link Ext.data.Record#create}.
- */
-Ext.data.XmlReader = function(meta, recordType){
- meta = meta || {};
-
- // backwards compat, convert idPath or id / success
- Ext.applyIf(meta, {
- idProperty: meta.idProperty || meta.idPath || meta.id,
- successProperty: meta.successProperty || meta.success
- });
-
- Ext.data.XmlReader.superclass.constructor.call(this, meta, recordType || meta.fields);
-};
-Ext.extend(Ext.data.XmlReader, Ext.data.DataReader, {
- /**
- * This method is only used by a DataProxy which has retrieved data from a remote server.
- * @param {Object} response The XHR object which contains the parsed XML document. The response is expected
- * to contain a property called <tt>responseXML</tt> which refers to an XML document object.
- * @return {Object} records A data block which is used by an {@link Ext.data.Store} as
- * a cache of Ext.data.Records.
- */
- read : function(response){
- var doc = response.responseXML;
- if(!doc) {
- throw {message: "XmlReader.read: XML Document not available"};
- }
- return this.readRecords(doc);
- },
-
- /**
- * Create a data block containing Ext.data.Records from an XML document.
- * @param {Object} doc A parsed XML document.
- * @return {Object} records A data block which is used by an {@link Ext.data.Store} as
- * a cache of Ext.data.Records.
- */
- readRecords : function(doc){
- /**
- * After any data loads/reads, the raw XML Document is available for further custom processing.
- * @type XMLDocument
- */
- this.xmlData = doc;
-
- var root = doc.documentElement || doc,
- q = Ext.DomQuery,
- totalRecords = 0,
- success = true;
-
- if(this.meta.totalProperty){
- totalRecords = this.getTotal(root, 0);
- }
- 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,
- totalRecords : totalRecords || records.length
- };
- },
-
- /**
- * Decode an XML response from server.
- * @param {String} action [{@link Ext.data.Api#actions} create|read|update|destroy]
- * @param {Object} response HTTP Response object from browser.
- * @return {Ext.data.Response} An instance of {@link Ext.data.Response}
- */
- readResponse : function(action, response) {
- var q = Ext.DomQuery,
- doc = response.responseXML,
- root = doc.documentElement || doc;
-
- // create general Response instance.
- var res = new Ext.data.Response({
- action: action,
- success : this.getSuccess(root),
- message: this.getMessage(root),
- data: this.extractData(q.select(this.meta.record, root) || q.select(this.meta.root, root), false),
- raw: doc
- });
-
- if (Ext.isEmpty(res.success)) {
- throw new Ext.data.DataReader.Error('successProperty-response', this.meta.successProperty);
- }
-
- // Create actions from a response having status 200 must return pk
- 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) {
- if (Ext.isFunction(key)) {
- return 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 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;
- }
-});</pre>
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-</html>
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git.ithinksw.org / extjs.git / blobdiff