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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Protocol/CSW.js
* @requires OpenLayers/Format/CSWGetRecords/v2_0_2.js
*/
/**
* Class: OpenLayers.Protocol.CSW.v2_0_2
* CS-W (Catalogue services for the Web) version 2.0.2 protocol.
*
* Inherits from:
* - <OpenLayers.Protocol>
*/
OpenLayers.Protocol.CSW.v2_0_2 = OpenLayers.Class(OpenLayers.Protocol, {
/**
* Property: formatOptions
* {Object} Optional options for the format. If a format is not provided,
* this property can be used to extend the default format options.
*/
formatOptions: null,
/**
* Constructor: OpenLayers.Protocol.CSW.v2_0_2
* A class for CSW version 2.0.2 protocol management.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*/
initialize: function(options) {
OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
if(!options.format) {
this.format = new OpenLayers.Format.CSWGetRecords.v2_0_2(OpenLayers.Util.extend({
}, this.formatOptions));
}
},
/**
* APIMethod: destroy
* Clean up the protocol.
*/
destroy: function() {
if(this.options && !this.options.format) {
this.format.destroy();
}
this.format = null;
OpenLayers.Protocol.prototype.destroy.apply(this);
},
/**
* Method: read
* Construct a request for reading new records from the Catalogue.
*/
read: function(options) {
options = OpenLayers.Util.extend({}, options);
OpenLayers.Util.applyDefaults(options, this.options || {});
var response = new OpenLayers.Protocol.Response({requestType: "read"});
var data = this.format.write(options.params || options);
response.priv = OpenLayers.Request.POST({
url: options.url,
callback: this.createCallback(this.handleRead, response, options),
params: options.params,
headers: options.headers,
data: data
});
return response;
},
/**
* Method: handleRead
* Deal with response from the read request.
*
* Parameters:
* response - {<OpenLayers.Protocol.Response>} The response object to pass
* to the user callback.
* This response is given a code property, and optionally a data property.
* The latter represents the CSW records as returned by the call to
* the CSW format read method.
* options - {Object} The user options passed to the read call.
*/
handleRead: function(response, options) {
if(options.callback) {
var request = response.priv;
if(request.status >= 200 && request.status < 300) {
// success
response.data = this.parseData(request);
response.code = OpenLayers.Protocol.Response.SUCCESS;
} else {
// failure
response.code = OpenLayers.Protocol.Response.FAILURE;
}
options.callback.call(options.scope, response);
}
},
/**
* Method: parseData
* Read HTTP response body and return records
*
* Parameters:
* request - {XMLHttpRequest} The request object
*
* Returns:
* {Object} The CSW records as returned by the call to the format read method.
*/
parseData: function(request) {
var doc = request.responseXML;
if(!doc || !doc.documentElement) {
doc = request.responseText;
}
if(!doc || doc.length <= 0) {
return null;
}
return this.format.read(doc);
},
CLASS_NAME: "OpenLayers.Protocol.CSW.v2_0_2"
});