/*!
* Ext JS Library 3.4.0
* Copyright(c) 2006-2011 Sencha Inc.
* licensing@sencha.com
* http://www.sencha.com/license
*/
/**
* @class Ext.data.XmlWriter
* @extends Ext.data.DataWriter
* DataWriter extension for writing an array or single {@link Ext.data.Record} object(s) in preparation for executing a remote CRUD action via XML.
* XmlWriter uses an instance of {@link Ext.XTemplate} for maximum flexibility in defining your own custom XML schema if the default schema is not appropriate for your needs.
* See the {@link #tpl} configuration-property.
*/
Ext.data.XmlWriter = function(params) {
Ext.data.XmlWriter.superclass.constructor.apply(this, arguments);
// compile the XTemplate for rendering XML documents.
this.tpl = (typeof(this.tpl) === 'string') ? new Ext.XTemplate(this.tpl).compile() : this.tpl.compile();
};
Ext.extend(Ext.data.XmlWriter, Ext.data.DataWriter, {
/**
* @cfg {String} documentRoot [xrequest] (Optional) The name of the XML document root-node. Note:
* this parameter is required only when sending extra {@link Ext.data.Store#baseParams baseParams} to the server
* during a write-request -- if no baseParams are set, the {@link Ext.data.XmlReader#record} meta-property can
* suffice as the XML document root-node for write-actions involving just a single record. For requests
* involving multiple records and NO baseParams, the {@link Ext.data.XmlWriter#root} property can
* act as the XML document root.
*/
documentRoot: 'xrequest',
/**
* @cfg {Boolean} forceDocumentRoot [false] Set to true to force XML documents having a root-node as defined
* by {@link #documentRoot}, even with no baseParams defined.
*/
forceDocumentRoot: false,
/**
* @cfg {String} root [records] The name of the containing element which will contain the nodes of an write-action involving multiple records. Each
* xml-record written to the server will be wrapped in an element named after {@link Ext.data.XmlReader#record} property.
* eg:
* However, when multiple records are written in a batch-operation, these records must be wrapped in a containing
* Element.
* eg:
<?xml version="1.0" encoding="UTF-8"?>
<user><first>Barney</first></user>
* Defaults to records. Do not confuse the nature of this property with that of {@link #documentRoot}
*/
root: 'records',
/**
* @cfg {String} xmlVersion [1.0] The version written to header of xml documents.
<?xml version="1.0" encoding="UTF-8"?>
<records>
<first>Barney</first></user>
<records><first>Barney</first></user>
</records>
*/
xmlVersion : '1.0',
/**
* @cfg {String} xmlEncoding [ISO-8859-15] The encoding written to header of xml documents.
<?xml version="1.0" encoding="ISO-8859-15"?>
*/
xmlEncoding: 'ISO-8859-15',
/**
* @cfg {String/Ext.XTemplate} tpl The XML template used to render {@link Ext.data.Api#actions write-actions} to your server.
* <?xml version="1.0" encoding="ISO-8859-15"?>
One can easily provide his/her own custom {@link Ext.XTemplate#constructor template-definition} if the default does not suffice.
*Defaults to:
<?xml version="{version}" encoding="{encoding}"?>
<tpl if="documentRoot"><{documentRoot}>
<tpl for="baseParams">
<tpl for=".">
<{name}>{value}</{name}>
</tpl>
</tpl>
<tpl if="records.length > 1"><{root}>',
<tpl for="records">
<{parent.record}>
<tpl for=".">
<{name}>{value}</{name}>
</tpl>
</{parent.record}>
</tpl>
<tpl if="records.length > 1"></{root}></tpl>
<tpl if="documentRoot"></{documentRoot}></tpl>
* Templates will be called with the following API
*Data reader class to create an Array of {@link Ext.data.Record} objects from an XML document * based on mappings in a provided {@link 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>
* @cfg {String} totalProperty 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.
* @cfg {String} record The DomQuery path to the repeated element which contains record information.
* @cfg {String} record The DomQuery path to the repeated element which contains record information.
* @cfg {String} successProperty The DomQuery path to the success attribute used by forms.
* @cfg {String} idPath The DomQuery path relative from the record element to the element that contains
* a record identifier value.
* @constructor
* Create a new XmlReader.
* @param {Object} meta Metadata configuration options
* @param {Object} recordType Either an Array of field definition objects as passed to
* {@link Ext.data.Record#create}, or a Record constructor object created using {@link Ext.data.Record#create}.
*/
Ext.data.XmlReader = function(meta, recordType){
meta = meta || {};
// backwards compat, convert idPath or id / success
Ext.applyIf(meta, {
idProperty: meta.idProperty || meta.idPath || meta.id,
successProperty: meta.successProperty || meta.success
});
Ext.data.XmlReader.superclass.constructor.call(this, meta, recordType || meta.fields);
};
Ext.extend(Ext.data.XmlReader, Ext.data.DataReader, {
/**
* This method is only used by a DataProxy which has retrieved data from a remote server.
* @param {Object} response 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.
* @return {Object} records A data block which is used by an {@link Ext.data.Store} as
* a cache of Ext.data.Records.
*/
read : function(response){
var doc = response.responseXML;
if(!doc) {
throw {message: "XmlReader.read: XML Document not available"};
}
return this.readRecords(doc);
},
/**
* Create a data block containing Ext.data.Records from an XML document.
* @param {Object} doc A parsed XML document.
* @return {Object} records A data block which is used by an {@link Ext.data.Store} as
* a cache of Ext.data.Records.
*/
readRecords : function(doc){
/**
* After any data loads/reads, the raw XML Document is available for further custom processing.
* @type XMLDocument
*/
this.xmlData = doc;
var root = doc.documentElement || doc,
q = Ext.DomQuery,
totalRecords = 0,
success = true;
if(this.meta.totalProperty){
totalRecords = this.getTotal(root, 0);
}
if(this.meta.successProperty){
success = this.getSuccess(root);
}
var records = this.extractData(q.select(this.meta.record, root), true); // <-- true to return Ext.data.Record[]
// TODO return Ext.data.Response instance. @see #readResponse
return {
success : success,
records : records,
totalRecords : totalRecords || records.length
};
},
/**
* Decode an XML response from server.
* @param {String} action [{@link Ext.data.Api#actions} create|read|update|destroy]
* @param {Object} response HTTP Response object from browser.
* @return {Ext.data.Response} An instance of {@link Ext.data.Response}
*/
readResponse : function(action, response) {
var q = Ext.DomQuery,
doc = response.responseXML,
root = doc.documentElement || doc;
// create general Response instance.
var res = new Ext.data.Response({
action: action,
success : this.getSuccess(root),
message: this.getMessage(root),
data: this.extractData(q.select(this.meta.record, root) || q.select(this.meta.root, root), false),
raw: doc
});
if (Ext.isEmpty(res.success)) {
throw new Ext.data.DataReader.Error('successProperty-response', this.meta.successProperty);
}
// Create actions from a response having status 200 must return pk
if (action === Ext.data.Api.actions.create) {
var def = Ext.isDefined(res.data);
if (def && Ext.isEmpty(res.data)) {
throw new Ext.data.JsonReader.Error('root-empty', this.meta.root);
}
else if (!def) {
throw new Ext.data.JsonReader.Error('root-undefined-response', this.meta.root);
}
}
return res;
},
getSuccess : function() {
return true;
},
/**
* build response-data extractor functions.
* @private
* @ignore
*/
buildExtractors : function() {
if(this.ef){
return;
}
var s = this.meta,
Record = this.recordType,
f = Record.prototype.fields,
fi = f.items,
fl = f.length;
if(s.totalProperty) {
this.getTotal = this.createAccessor(s.totalProperty);
}
if(s.successProperty) {
this.getSuccess = this.createAccessor(s.successProperty);
}
if (s.messageProperty) {
this.getMessage = this.createAccessor(s.messageProperty);
}
this.getRoot = function(res) {
return (!Ext.isEmpty(res[this.meta.record])) ? res[this.meta.record] : res[this.meta.root];
};
if (s.idPath || s.idProperty) {
var g = this.createAccessor(s.idPath || s.idProperty);
this.getId = function(rec) {
var id = g(rec) || rec.id;
return (id === undefined || id === '') ? null : id;
};
} else {
this.getId = function(){return null;};
}
var ef = [];
for(var i = 0; i < fl; i++){
f = fi[i];
var map = (f.mapping !== undefined && f.mapping !== null) ? f.mapping : f.name;
ef.push(this.createAccessor(map));
}
this.ef = ef;
},
/**
* Creates a function to return some particular key of data from a response.
* @param {String} key
* @return {Function}
* @private
* @ignore
*/
createAccessor : function(){
var q = Ext.DomQuery;
return function(key) {
if (Ext.isFunction(key)) {
return key;
}
switch(key) {
case this.meta.totalProperty:
return function(root, def){
return q.selectNumber(key, root, def);
};
break;
case this.meta.successProperty:
return function(root, def) {
var sv = q.selectValue(key, root, true);
var success = sv !== false && sv !== 'false';
return success;
};
break;
default:
return function(root, def) {
return q.selectValue(key, root, def);
};
break;
}
};
}(),
/**
* extracts values and type-casts a row of data from server, extracted by #extractData
* @param {Hash} data
* @param {Ext.data.Field[]} items
* @param {Number} len
* @private
* @ignore
*/
extractValues : function(data, items, len) {
var f, values = {};
for(var j = 0; j < len; j++){
f = items[j];
var v = this.ef[j](data);
values[f.name] = f.convert((v !== undefined) ? v : f.defaultValue, data);
}
return values;
}
});/**
* @class Ext.data.XmlStore
* @extends Ext.data.Store
* Small helper class to make creating {@link Ext.data.Store}s from XML data easier. * A XmlStore will be automatically configured with a {@link Ext.data.XmlReader}.
*A store configuration would be something like:
var store = new Ext.data.XmlStore({
// store configs
autoDestroy: true,
storeId: 'myStore',
url: 'sheldon.xml', // automatically configures a HttpProxy
// reader configs
record: 'Item', // records will have an "Item" tag
idPath: 'ASIN',
totalRecords: '@TotalResults'
fields: [
// set up the fields mapping into the xml doc
// The first needs mapping, the others are very basic
{name: 'Author', mapping: 'ItemAttributes > Author'},
'Title', 'Manufacturer', 'ProductGroup'
]
});
*
* This store is configured to consume a returned object of the form:
<?xml version="1.0" encoding="UTF-8"?>
<ItemSearchResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2009-05-15">
<Items>
<Request>
<IsValid>True</IsValid>
<ItemSearchRequest>
<Author>Sidney Sheldon</Author>
<SearchIndex>Books</SearchIndex>
</ItemSearchRequest>
</Request>
<TotalResults>203</TotalResults>
<TotalPages>21</TotalPages>
<Item>
<ASIN>0446355453</ASIN>
<DetailPageURL>
http://www.amazon.com/
</DetailPageURL>
<ItemAttributes>
<Author>Sidney Sheldon</Author>
<Manufacturer>Warner Books</Manufacturer>
<ProductGroup>Book</ProductGroup>
<Title>Master of the Game</Title>
</ItemAttributes>
</Item>
</Items>
</ItemSearchResponse>
*
* An object literal of this form could also be used as the {@link #data} config option.
* Note: Although not listed here, this class accepts all of the configuration options of * {@link Ext.data.XmlReader XmlReader}.
* @constructor * @param {Object} config * @xtype xmlstore */ Ext.data.XmlStore = Ext.extend(Ext.data.Store, { /** * @cfg {Ext.data.DataReader} reader @hide */ constructor: function(config){ Ext.data.XmlStore.superclass.constructor.call(this, Ext.apply(config, { reader: new Ext.data.XmlReader(config) })); } }); Ext.reg('xmlstore', Ext.data.XmlStore);