    // @tag enterprise
    /**
     * The AMF Reader is used by an {@link Ext.data.amf.Proxy AMF Proxy} to read
     * records from a server response that contains binary data in either AMF0 or
     * AMF3 format. AMF Reader constructs an {@link Ext.data.amf.Packet AMF Packet}
     * and uses it to decode the binary data into javascript objects, then simply
     * allows its superclass ({@link Ext.data.reader.Json}) to handle converting the
     * raw javascript objects into {@link Ext.data.Model} instances.
     *
     * For a more detailed tutorial see the [AMF Guide](#/guide/amf).
     */
    Ext.define('Ext.data.amf.Reader', {

        extend: 'Ext.data.reader.Json',

        alias : 'reader.amf',

        requires: [
            'Ext.data.amf.Packet'
        ],

        /**
         * @cfg {Number} messageIndex
         * AMF Packets can contain multiple messages. This config specifies the
         * 0-based index of the message that contains the record data.
         */
        messageIndex: 0,

        /**
         * Reads records from a XMLHttpRequest response object containing a binary
         * AMF Packet and returns a ResultSet.
         * @param {Object} response The XMLHttpRequest response object
         * @return {Ext.data.ResultSet}
         */
        read: function(response) {
            var me = this,
                bytes = response.responseBytes,
                packet, messages, resultSet;

            if (!bytes) {
                throw "AMF Reader cannot process the response because it does not contain binary data. Make sure the Proxy's 'binary' config is true.";
            }

            packet = new Ext.data.amf.Packet(),
            packet.decode(bytes);
            messages = packet.messages;

            if (messages.length) {
                resultSet = me.readRecords(messages[me.messageIndex].body);
            } else {
                // no messages, return null result set
                resultSet = me.nullResultSet;
                if (packet.invalid) {
                    // packet contains invalid data
                    resultSet.success = false;
                }
            }

            return resultSet;
        }
    });