    DataReader
      XmlReader

# Class Ext.data.XmlReader

Package: | Ext.data
Defined In: | XmlReader.js
Class: | XmlReader
Extends: | DataReader

Data reader class to create an Array of Ext.data.Record objects from an XML document based on mappings in a provided Ext.data.Record constructor.

Note: 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".

Example 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({
       totalProperty: "results", // The element which contains the total dataset size (optional)
       record: "row",           // The repeated element which contains row information
       idProperty: "id"         // The element within the row that provides an ID for the record (optional)
       messageProperty: "msg"   // The element within the response that provides a user-feedback message (optional)
    }, Employee);

This would consume an XML file like this:

    <?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>

## Config Options

Config Options | Defined By
--- | ---
| fields : Array/Object Either an Array of Field definition objects (which will be passed to Ext.data.Record.create, or a Record constructor ... Either an Array of Field definition objects (which will be passed to Ext.data.Record.create, or a Record constructor created from Ext.data.Record.create. | DataReader
| idPath : String The DomQuery path relative from the record element to the element that contains a record identifier value. | XmlReader
| messageProperty : String [undefined] Optional name of a property within a server-response that represents a user-feedback message. | DataReader
| record : String The DomQuery path to the repeated element which contains record information. | XmlReader
| record : String The DomQuery path to the repeated element which contains record information. | XmlReader
| successProperty : String The DomQuery path to the success attribute used by forms. | XmlReader
| totalProperty : String The DomQuery path from which to retrieve the total number of records in the dataset. This is only needed if the whole... 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. | XmlReader

## Public Properties

Property | Defined By
--- | ---
| buildExtractors : Object Abstract method, overridden in DataReader extensions such as Ext.data.JsonReader and Ext.data.XmlReader | DataReader
| extractValues : Object Abstract method overridden in DataReader extensions such as Ext.data.JsonReader and Ext.data.XmlReader | DataReader
| getId : Object Abstract method created in extension's buildExtractors impl. | DataReader
| getMessage : Object Abstract method created in extension's buildExtractors impl. | DataReader
| getRoot : Object Abstract method created in extension's buildExtractors impl. | DataReader
| getSuccess : Object Abstract method created in extension's buildExtractors impl. | DataReader
| getTotal : Object Abstract method created in extension's buildExtractors impl. | DataReader
| meta : Mixed This DataReader's configured metadata as passed to the constructor. | DataReader
| xmlData : XMLDocument After any data loads/reads, the raw XML Document is available for further custom processing. | XmlReader

## Public Methods

Method | Defined By
--- | ---
| XmlReader( Object meta, Object recordType ) Create a new XmlReader. Create a new XmlReader. Parameters: `meta` : Object Metadata configuration options `recordType` : Object Either an Array of field definition objects as passed to Ext.data.Record.create, or a Record constructor object created using Ext.data.Record.create. Returns: void | XmlReader
| isData( Object data ) : Boolean Returns true if the supplied data-hash looks and quacks like data. Checks to see if it has a key corresponding to id... Returns true if the supplied data-hash looks and quacks like data. Checks to see if it has a key corresponding to idProperty defined in your DataReader config containing non-empty pk. Parameters: `data` : Object Returns: `Boolean` | DataReader
| read( Object response ) : Object This method is only used by a DataProxy which has retrieved data from a remote server. This method is only used by a DataProxy which has retrieved data from a remote server. Parameters: `response` : Object The XHR object which contains the parsed XML document. The response is expected to contain a property called `responseXML` which refers to an XML document object. Returns: `Object` records A data block which is used by an {@link Ext.data.Store} as a cache of Ext.data.Records. | XmlReader
| readRecords( Object doc ) : Object Create a data block containing Ext.data.Records from an XML document. Create a data block containing Ext.data.Records from an XML document. Parameters: `doc` : Object A parsed XML document. Returns: `Object` records A data block which is used by an {@link Ext.data.Store} as a cache of Ext.data.Records. | XmlReader
| readResponse( String action, Object response ) : Ext.data.Response Decode an XML response from server. Decode an XML response from server. Parameters: `action` : String [Ext.data.Api.actions create|read|update|destroy] `response` : Object HTTP Response object from browser. Returns: `Ext.data.Response` An instance of {@link Ext.data.Response} | XmlReader
| realize( Record/Record[] record, Object/Object[] data ) : void Used for un-phantoming a record after a successful database insert. Sets the records pk along with new data from ser... Used for un-phantoming a record after a successful database insert. Sets the records pk along with new data from server. You must return at least the database pk using the idProperty defined in your DataReader configuration. The incoming data from server will be merged with the data in the local record. In addition, you must return record-data from the server in the same order received. Will perform a commit as well, un-marking dirty-fields. Store's "update" event will be suppressed. Parameters: `record` : Record/Record[] The phantom record to be realized. `data` : Object/Object[] The new record data to apply. Must include the primary-key from database defined in idProperty field. Returns: void | DataReader
| update( Record/Record[] rs, Object/Object[] data ) : void Used for updating a non-phantom or "real" record's data with fresh data from server after remote-save. If returning d... Used for updating a non-phantom or "real" record's data with fresh data from server after remote-save. If returning data from multiple-records after a batch-update, you must return record-data from the server in the same order received. Will perform a commit as well, un-marking dirty-fields. Store's "update" event will be suppressed as the record receives fresh new data-hash Parameters: `rs` : Record/Record[] `data` : Object/Object[] Returns: void | DataReader

## Public Events

This class has no public events.