Revert "[Roots] Remove obsolete provider"

This reverts commit b49fef78f5.

Fixes #1284

platform/core/src/models/RootModelProvider.js

@@ -0,0 +1,79 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2016, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is 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.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+/**
+ * Module defining RootModelProvider. Created by vwoeltje on 11/7/14.
+ */
+define(
+    ['./StaticModelProvider'],
+    function (StaticModelProvider) {
+
+        /**
+         * Provides the root object (id = "ROOT"), which is the top-level
+         * domain object shown when the application is started, from which all
+         * other domain objects are reached.
+         *
+         * The root model provider works as the static model provider,
+         * except that it aggregates roots[] instead of models[], and
+         * exposes them all as composition of the root object ROOT,
+         * whose model is also provided by this service.
+         *
+         * @memberof platform/core
+         * @constructor
+         * @implements {ModelService}
+         * @param {Array} roots all `roots[]` extensions
+         * @param $q Angular's $q, for promises
+         * @param $log Angular's $log, for logging
+         */
+        function RootModelProvider(roots, $q, $log) {
+            // Pull out identifiers to used as ROOT's
+            var ids = roots.map(function (root) {
+                return root.id;
+            });
+
+            // Assign an initial location to root models
+            roots.forEach(function (root) {
+                if (!root.model) {
+                    root.model = {};
+                }
+                root.model.location = 'ROOT';
+            });
+
+            this.baseProvider = new StaticModelProvider(roots, $q, $log);
+            this.rootModel = {
+                name: "The root object",
+                type: "root",
+                composition: ids
+            };
+        }
+
+        RootModelProvider.prototype.getModels = function (ids) {
+            var rootModel = this.rootModel;
+            return this.baseProvider.getModels(ids).then(function (models) {
+                models.ROOT = rootModel;
+                return models;
+            });
+        };
+
+        return RootModelProvider;
+    }
+);