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cf3566742b
Co-authored-by: Deep Tailor <deep.j.tailor@nasa.gov> Co-authored-by: Andrew Henry <akhenry@gmail.com>
72 lines
2.7 KiB
JavaScript
72 lines
2.7 KiB
JavaScript
/*****************************************************************************
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* Open MCT, Copyright (c) 2014-2021, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT is licensed under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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/**
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* This bundle implements "containment" rules, which determine which objects
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* can be contained within which other objects.
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* @namespace platform/containment
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*/
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define(
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[],
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function () {
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/**
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* Determines whether a given object can contain a candidate child object.
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* @constructor
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* @memberof platform/containment
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* @implements {Policy.<DomainObjectImpl, DomainObjectImpl>}
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*/
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function CompositionPolicy() {
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}
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CompositionPolicy.prototype.allow = function (parent, child) {
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var parentDef = parent.getCapability('type').getDefinition();
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// A parent without containment rules can contain anything.
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if (!parentDef.contains) {
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return true;
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}
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// If any containment rule matches context type, the candidate
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// can contain this type.
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return parentDef.contains.some(function (c) {
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// Simple containment rules are supported typeKeys.
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if (typeof c === 'string') {
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return c === child.getCapability('type').getKey();
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}
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// More complicated rules require context to have all specified
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// capabilities.
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if (!Array.isArray(c.has)) {
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c.has = [c.has];
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}
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return c.has.every(function (capability) {
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return child.hasCapability(capability);
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});
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});
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};
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return CompositionPolicy;
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}
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);
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