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/*!
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
*
* 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.
*/
import Common from '../common/Common';
import Metamodel from './Metamodel';
/**
* A simple lookup for schemas by ID.
*/
export default class Metamodels {
// ///////////////////////////////////////////////////////////////////////////////////////////////
/**
* Construct metamodels from provided JSON definitions.
* @param metamodels JSON metamodel definitions.
*/
constructor(metamodels) {
Common.assertType(metamodels, 'Array');
this.lookup = {};
// Save each metamodel. It's up to the Metamodel class to make sense of
// potentially nonsense metamodel definitions.
for (const json of metamodels) {
const metamodel = new Metamodel(json);
this.lookup[metamodel.getId()] = metamodel;
}
// Set (or override) the default metamodel with the inlined one.
this.lookup.$ = Metamodel.getDefault();
Common.assertInstanceOf(this.lookup.$, Metamodel);
}
// ///////////////////////////////////////////////////////////////////////////////////////////////
/**
* Get Metamodel by its @id.
* @param id identifier.
* @returns Metamodel, or undefined if no matching metamodel found.
*/
getMetamodel(id) {
return this.lookup[id];
}
// ///////////////////////////////////////////////////////////////////////////////////////////////
/**
* Get the default (permissive) metamodel.
* @returns default Metamodel.
*/
getDefault() {
return this.lookup.$;
}
// ///////////////////////////////////////////////////////////////////////////////////////////////
/**
* Get metamodel by its @id, falling back to the default.
* @param id identifier.
* @returns matching metamodel, or default.
*/
getMetamodelOrDefault(id) {
const metamodel = this.getMetamodel(id);
if (metamodel) {
return metamodel;
}
return this.getDefault();
}
}
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