80 lines
No EOL
3.3 KiB
JavaScript
80 lines
No EOL
3.3 KiB
JavaScript
/*
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* Ext JS Library 1.0.1
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* Copyright(c) 2006-2007, Ext JS, LLC.
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* licensing@extjs.com
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*
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* http://www.extjs.com/license
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*/
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/**
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* @class Ext.data.ArrayReader
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* @extends Ext.data.DataReader
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* Data reader class to create an Array of Ext.data.Record objects from an Array.
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* Each element of that Array represents a row of data fields. The
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* fields are pulled into a Record object using as a subscript, the <em>mapping</em> property
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* of the field definition if it exists, or the field's ordinal position in the definition.
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* <p>
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* The code below lists all configuration options.
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* <pre><code>
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var RecordDef = Ext.data.Record.create([
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{name: 'name', mapping: 1},
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{name: 'occupation', mapping: 2},
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]);
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var myReader = new Ext.data.ArrayReader({
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id: 0 // The subscript within row Array that provides an ID for the Record (optional)
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}, RecordDef);
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</code></pre>
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* <p>
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* This would consume an Array like this:
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* <pre><code>
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[ [1, 'Bill', 'Gardener'], [2, 'Ben', 'Horticulturalist'] ]
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</code></pre>
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* @cfg {String} totalProperty Name of the property from which to retrieve the total number of records
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* in the dataset. This is only needed if the whole dataset is not passed in one go, but is being
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* paged from the remote server.
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* @cfg {String} id (optional) The subscript within row Array that provides an ID for the Record
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* @constructor
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* Create a new JsonReader
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* @param {Object} meta Metadata configuration options.
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* @param {Array/Ext.data.Record constructor} recordType Either an Array of field definition objects,
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* or an {@link Ext.data.Record} object created using {@link Ext.data.Record#create}.
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*/
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Ext.data.ArrayReader = function(meta, recordType){
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Ext.data.ArrayReader.superclass.constructor.call(this, meta, recordType);
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};
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Ext.extend(Ext.data.ArrayReader, Ext.data.JsonReader, {
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/**
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* Create a data block containing Ext.data.Records from an XML document.
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* @param {Object} o An object which contains an Array of row objects in the property specified
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* in the config as 'root, and optionally a property, specified in the config as 'totalProperty'
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* which contains the total size of the dataset.
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* @return {Object} data A data block which is used by an Ext.data.Store object as
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* a cache of Ext.data.Records.
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*/
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readRecords : function(o){
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var sid = this.meta ? this.meta.id : null;
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var recordType = this.recordType, fields = recordType.prototype.fields;
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var records = [];
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var root = o;
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for(var i = 0; i < root.length; i++){
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var n = root[i];
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var values = {};
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var id = ((sid || sid === 0) && n[sid] !== undefined && n[sid] !== "" ? n[sid] : null);
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for(var j = 0, jlen = fields.length; j < jlen; j++){
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var f = fields.items[j];
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var k = f.mapping !== undefined && f.mapping !== null ? f.mapping : j;
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var v = n[k] !== undefined ? n[k] : f.defaultValue;
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v = f.convert(v);
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values[f.name] = v;
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}
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var record = new recordType(values, id);
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record.json = n;
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records[records.length] = record;
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}
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return {
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records : records,
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totalRecords : records.length
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};
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}
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}); |