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<pre class="prettyprint lang-js">// @tag enterprise
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<span id='Ext-data-amf-Reader'>/**
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</span> * The AMF Reader is used by an {@link Ext.data.amf.Proxy AMF Proxy} to read
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* records from a server response that contains binary data in either AMF0 or
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* AMF3 format. AMF Reader constructs an {@link Ext.data.amf.Packet AMF Packet}
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* and uses it to decode the binary data into javascript objects, then simply
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* allows its superclass ({@link Ext.data.reader.Json}) to handle converting the
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* raw javascript objects into {@link Ext.data.Model} instances.
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*
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* For a more detailed tutorial see the [AMF Guide](#/guide/amf).
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*/
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Ext.define('Ext.data.amf.Reader', {
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extend: 'Ext.data.reader.Json',
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alias : 'reader.amf',
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requires: [
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'Ext.data.amf.Packet'
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],
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<span id='Ext-data-amf-Reader-cfg-messageIndex'> /**
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</span> * @cfg {Number} messageIndex
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* AMF Packets can contain multiple messages. This config specifies the
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* 0-based index of the message that contains the record data.
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*/
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messageIndex: 0,
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<span id='Ext-data-amf-Reader-method-read'> /**
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</span> * Reads records from a XMLHttpRequest response object containing a binary
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* AMF Packet and returns a ResultSet.
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* @param {Object} response The XMLHttpRequest response object
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* @return {Ext.data.ResultSet}
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*/
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read: function(response) {
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var me = this,
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bytes = response.responseBytes,
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packet, messages, resultSet;
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if (!bytes) {
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throw "AMF Reader cannot process the response because it does not contain binary data. Make sure the Proxy's 'binary' config is true.";
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}
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packet = new Ext.data.amf.Packet(),
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packet.decode(bytes);
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messages = packet.messages;
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if (messages.length) {
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resultSet = me.readRecords(messages[me.messageIndex].body);
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} else {
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// no messages, return null result set
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resultSet = me.nullResultSet;
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if (packet.invalid) {
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// packet contains invalid data
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resultSet.success = false;
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}
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}
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return resultSet;
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}
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});
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