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63 lines
2.4 KiB
JavaScript
63 lines
2.4 KiB
JavaScript
/*****************************************************************************
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* Open MCT Web, Copyright (c) 2014-2015, 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 Web 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 Web 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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/*global define*/
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define(
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[],
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function () {
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"use strict";
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/**
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* An editable model cache stores domain object models that have been
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* made editable, to support a group that can be saved all-at-once.
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* This is useful in Edit mode, which is launched for a specific
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* object but may contain changes across many objects.
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* @constructor
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*/
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function EditableModelCache() {
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var cache = {};
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// Deep-copy a model. Models are JSONifiable, so this can be
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// done by stringification then destringification
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function clone(model) {
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return JSON.parse(JSON.stringify(model));
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}
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return {
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/**
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* Get this domain object's model from the cache (or
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* place it in the cache if it isn't in the cache yet)
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* @returns a clone of the domain object's model
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*/
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getCachedModel: function (domainObject) {
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var id = domainObject.getId();
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return (cache[id] =
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cache[id] || clone(domainObject.getModel()));
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}
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};
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}
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return EditableModelCache;
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}
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); |