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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/SOS.js
* @requires OpenLayers/Format/SOSGetFeatureOfInterest.js
*/
/**
* Class: OpenLayers.Protocol.SOS.v1_0_0
* An SOS v1.0.0 Protocol for vector layers. Create a new instance with the
* <OpenLayers.Protocol.SOS.v1_0_0> constructor.
*
* Inherits from:
* - <OpenLayers.Protocol>
*/
OpenLayers.Protocol.SOS.v1_0_0 = OpenLayers.Class(OpenLayers.Protocol, {
/**
* APIProperty: fois
* {Array(String)} Array of features of interest (foi)
*/
fois: null,
/**
* 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.SOS
* A class for giving layers an SOS protocol.
*
* Parameters:
* options - {Object} Optional object whose properties will be set on the
* instance.
*
* Valid options properties:
* url - {String} URL to send requests to (required).
* fois - {Array} The features of interest (required).
*/
initialize: function(options) {
OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
if(!options.format) {
this.format = new OpenLayers.Format.SOSGetFeatureOfInterest(
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);
},
/**
* APIMethod: read
* Construct a request for reading new sensor positions. This is done by
* issuing one GetFeatureOfInterest request.
*/
read: function(options) {
options = OpenLayers.Util.extend({}, options);
OpenLayers.Util.applyDefaults(options, this.options || {});
var response = new OpenLayers.Protocol.Response({requestType: "read"});
var format = this.format;
var data = OpenLayers.Format.XML.prototype.write.apply(format,
[format.writeNode("sos:GetFeatureOfInterest", {fois: this.fois})]
);
response.priv = OpenLayers.Request.POST({
url: options.url,
callback: this.createCallback(this.handleRead, response, options),
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.
* 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.features = this.parseFeatures(request);
response.code = OpenLayers.Protocol.Response.SUCCESS;
} else {
// failure
response.code = OpenLayers.Protocol.Response.FAILURE;
}
options.callback.call(options.scope, response);
}
},
/**
* Method: parseFeatures
* Read HTTP response body and return features
*
* Parameters:
* request - {XMLHttpRequest} The request object
*
* Returns:
* {Array({<OpenLayers.Feature.Vector>})} Array of features
*/
parseFeatures: 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.SOS.v1_0_0"
});