/* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the Clear BSD license.
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
* full text of the license. */
/**
* @requires OpenLayers/Format/Context.js
*/
/**
* Class: OpenLayers.Format.OWSContext
* Read and write OWS Context documents. OWS Context documents are a
* preliminary OGC (Open Geospatial Consortium) standard for storing the
* state of a web mapping application. In a way it is the successor to
* Web Map Context (WMC), since it is more generic and more types of layers
* can be stored. Also, nesting of layers is supported since version 0.3.1.
* For more information see: http://www.ogcnetwork.net/context
*/
OpenLayers.Format.OWSContext = OpenLayers.Class(OpenLayers.Format.Context,{
/**
* APIProperty: defaultVersion
* {String} Version number to assume if none found. Default is "0.3.1".
*/
defaultVersion: "0.3.1",
/**
* Method: getParser
* Get the OWSContext parser given a version. Create a new parser if it does not
* already exist.
*
* Parameters:
* version - {String} The version of the parser.
*
* Returns:
* {<OpenLayers.Format.OWSContext>} An OWSContext parser.
*/
getParser: function(version) {
var v = version || this.version || this.defaultVersion;
// 0.3.1 is backwards compatible with 0.3.0
if (v === "0.3.0") {
v = this.defaultVersion;
}
if(!this.parser || this.parser.VERSION != v) {
var format = OpenLayers.Format.OWSContext[
"v" + v.replace(/\./g, "_")
];
if(!format) {
throw "Can't find a OWSContext parser for version " + v;
}
this.parser = new format(this.options);
}
return this.parser;
},
/**
* Method: toContext
* Create a context object free from layer given a map or a
* context object.
*
* Parameters:
* obj - {<OpenLayers.Map> | Object} The map or context.
*
* Returns:
* {Object} A context object.
*/
toContext: function(obj) {
var context = {};
if(obj.CLASS_NAME == "OpenLayers.Map") {
context.bounds = obj.getExtent();
context.maxExtent = obj.maxExtent;
context.projection = obj.projection;
context.size = obj.getSize();
context.layers = obj.layers;
}
return context;
},
CLASS_NAME: "OpenLayers.Format.OWSContext"
});