[Creation] Add instantiate service

...to allow insantiating domain objects completely
externally from any other domain object. Desired by
code review feedback for nasa/openmctweb#255.

platform/core/bundle.json

@@ -223,6 +223,11 @@
                 "key": "contextualize",
                 "implementation": "services/Contextualize.js",
                 "depends": [ "$log" ]
+            },
+            {
+                "key": "instantiate",
+                "implementation": "services/Instantiate.js",
+                "depends": [ "capabilityService" ]
             }
         ],
         "roots": [

platform/core/src/services/Instantiate.js

@@ -0,0 +1,54 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web 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 Web 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.
+ *****************************************************************************/
+/*global define,Promise*/
+
+define(
+    ['../objects/DomainObjectImpl', 'uuid'],
+    function (DomainObjectImpl, uuid) {
+        'use strict';
+
+        /**
+         * The `instantiate` service allows new domain object instances to be
+         * created. These objects are not persisted to any back-end or
+         * placed anywhere in the object hierarchy by default.
+         *
+         * Usage: `instantiate(model, [id])`
+         *
+         * ...returns a new instance of a domain object with the specified
+         * model. An identifier may be provided; if omitted, one will be
+         * generated instead.
+         *
+         * @constructor
+         * @memberof platform/core
+         * @param $injector Angular's `$injector`
+         */
+        function Instantiate(capabilityService) {
+            return function (model, id) {
+                var capabilities = capabilityService.getCapabilities(model);
+                id = id || uuid();
+                return new DomainObjectImpl(id, model, capabilities);
+            };
+        }
+
+        return Instantiate;
+    }
+);