Added Collections and Models for a Region.

Change-Id: Ic033b2890dad18e47b057e6b1d1c8535d812590d
diff --git a/web/gui/src/main/webapp/app/view/topo2/topo2Region.js b/web/gui/src/main/webapp/app/view/topo2/topo2Region.js
new file mode 100644
index 0000000..ff1d52f
--- /dev/null
+++ b/web/gui/src/main/webapp/app/view/topo2/topo2Region.js
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ ONOS GUI -- Topology Region Module.
+ Module that holds the current region in memory
+ */
+
+(function () {
+    'use strict';
+
+    var $log,
+        wss,
+        t2sr,
+        t2ds,
+        t2hs,
+        t2ls;
+
+    var regions;
+
+    function init() {
+        regions = {};
+    }
+
+    function addRegion(data) {
+
+        var region = {
+            subregions: t2sr.createSubRegionCollection(data.subregions),
+            devices: t2ds.createDeviceCollection(data.devices, data),
+            hosts: t2hs.createHostCollection(data.hosts),
+            links: t2ls.createLinkCollection(data.links),
+        };
+
+        $log.debug('Region: ', region);
+    }
+
+    angular.module('ovTopo2')
+    .factory('Topo2RegionService',
+        ['$log', 'WebSocketService', 'Topo2SubRegionService', 'Topo2DeviceService',
+        'Topo2HostService', 'Topo2LinkService',
+
+        function (_$log_, _wss_, _t2sr_, _t2ds_, _t2hs_, _t2ls_) {
+
+            $log = _$log_;
+            wss = _wss_;
+            t2sr = _t2sr_;
+            t2ds = _t2ds_;
+            t2hs = _t2hs_;
+            t2ls = _t2ls_;
+
+            return {
+                init: init,
+
+                addRegion: addRegion,
+                getSubRegions: t2sr.getSubRegions
+            };
+        }]);
+
+})();