add Protocol for Sensor Observation Service r=ahocevar (closes #2373)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9912 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Protocol/SOS.js

@@ -0,0 +1,32 @@
+/* Copyright (c) 2006-2009 MetaCarta, Inc., published under the Clear BSD
+ * license.  See http://svn.openlayers.org/trunk/openlayers/license.txt for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/Protocol.js
+ */
+
+/**
+ * Function: OpenLayers.Protocol.SOS
+ * Used to create a versioned SOS protocol.  Default version is 1.0.0.
+ *
+ * Returns:
+ * {<OpenLayers.Protocol>} An SOS protocol for the given version.
+ */
+OpenLayers.Protocol.SOS = function(options) {
+    options = OpenLayers.Util.applyDefaults(
+        options, OpenLayers.Protocol.SOS.DEFAULTS
+    );
+    var cls = OpenLayers.Protocol.SOS["v"+options.version.replace(/\./g, "_")];
+    if(!cls) {
+        throw "Unsupported SOS version: " + options.version;
+    }
+    return new cls(options);
+};
+
+/**
+ * Constant: OpenLayers.Protocol.SOS.DEFAULTS
+ */
+OpenLayers.Protocol.SOS.DEFAULTS = {
+    "version": "1.0.0"
+};