/*****************************************************************************
 * Open MCT, Copyright (c) 2014-2017, 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.
 *****************************************************************************/

define(
    [],
    function () {

        /**
         * Defines composition policy for Display Layout objects.
         * They cannot contain folders.
         * @constructor
         * @memberof platform/features/layout
         * @implements {Policy.<View, DomainObject>}
         */
        function LayoutCompositionPolicy() {
        }

        LayoutCompositionPolicy.prototype.allow = function (parent, child) {
            var parentType = parent.getCapability('type');
            if (parentType.instanceOf('layout') &&
                child.getCapability('type').instanceOf('folder')) {

                return false;
            }

            return true;
        };

        return LayoutCompositionPolicy;
    }
);