ArrayReader.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
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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.ArrayReader
- * @extends Ext.data.JsonReader
- * <p>Data reader class to create an Array of {@link Ext.data.Record} objects from an Array.
- * Each element of that Array represents a row of data fields. The
- * fields are pulled into a Record object using as a subscript, the <code>mapping</code> property
- * of the field definition if it exists, or the field's ordinal position in the definition.</p>
- * <p>Example code:</p>
- * <pre><code>
- var Employee = Ext.data.Record.create([
- {name: 'name', mapping: 1}, // "mapping" only needed if an "id" field is present which
- {name: 'occupation', mapping: 2} // precludes using the ordinal position as the index.
- ]);
- var myReader = new Ext.data.ArrayReader({
- {@link #idIndex}: 0
- }, Employee);
- </code></pre>
- * <p>This would consume an Array like this:</p>
- * <pre><code>
- [ [1, 'Bill', 'Gardener'], [2, 'Ben', 'Horticulturalist'] ]
- * </code></pre>
- * @constructor
- * Create a new ArrayReader
- * @param {Object} meta Metadata configuration options.
- * @param {Array/Object} recordType
- * <p>Either an Array of {@link Ext.data.Field Field} definition objects (which
- * will be passed to {@link Ext.data.Record#create}, or a {@link Ext.data.Record Record}
- * constructor created from {@link Ext.data.Record#create}.</p>
- */
- Ext.data.ArrayReader = Ext.extend(Ext.data.JsonReader, {
- /**
- * @cfg {String} successProperty
- * @hide
- */
- /**
- * @cfg {Number} id (optional) The subscript within row Array that provides an ID for the Record.
- * Deprecated. Use {@link #idIndex} instead.
- */
- /**
- * @cfg {Number} idIndex (optional) The subscript within row Array that provides an ID for the Record.
- */
- /**
- * Create a data block containing Ext.data.Records from an Array.
- * @param {Object} o An Array of row objects which represents the dataset.
- * @return {Object} data A data block which is used by an Ext.data.Store object as
- * a cache of Ext.data.Records.
- */
- readRecords : function(o){
- this.arrayData = o;
- var s = this.meta,
- sid = s ? Ext.num(s.idIndex, s.id) : null,
- recordType = this.recordType,
- fields = recordType.prototype.fields,
- records = [],
- v;
- var root = this.getRoot(o);
- for(var i = 0, len = root.length; i < len; i++) {
- var n = root[i],
- values = {},
- id = ((sid || sid === 0) && n[sid] !== undefined && n[sid] !== "" ? n[sid] : null);
- for(var j = 0, jlen = fields.length; j < jlen; j++) {
- var f = fields.items[j],
- k = f.mapping !== undefined && f.mapping !== null ? f.mapping : j;
- v = n[k] !== undefined ? n[k] : f.defaultValue;
- v = f.convert(v, n);
- values[f.name] = v;
- }
- var record = new recordType(values, id);
- record.json = n;
- records[records.length] = record;
- }
- var totalRecords = records.length;
- if(s.totalProperty) {
- v = parseInt(this.getTotal(o), 10);
- if(!isNaN(v)) {
- totalRecords = v;
- }
- }
- return {
- records : records,
- totalRecords : totalRecords
- };
- }
- });