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- <title>The source code</title>\r
- <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />\r
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- <pre class="prettyprint lang-js"><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({
- totalRecords: "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)
-}, 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} totalRecords 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} 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 || {};
- 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;
- 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 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;
- }
-
- return {
- success : success,
- records : records,
- totalRecords : totalRecords || records.length
- };
- },
-
- // TODO: implement readResponse for XmlReader
- readResponse : Ext.emptyFn
-});</pre> \r
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