@accordproject/concerto-core/lib/introspect/enumvaluedeclaration.js

/*
 * 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.
 */

'use strict';

const Property = require('./property');

/**
 * Class representing a value from a set of enumerated values
 *
 * @extends Property
 * @see See {@link Property}
 * @class
 * @memberof module:concerto-core
 */
class EnumValueDeclaration extends Property {

    /**
     * Create a EnumValueDeclaration.
     * @param {ClassDeclaration} parent - The owner of this property
     * @param {Object} ast - The AST created by the parser
     * @throws {IllegalModelException}
     */
    constructor(parent, ast) {
        super(parent, ast);
        this._isEnumValueDeclaration = true;
    }

    /**
     * Validate the property
     * @param {ClassDeclaration} classDecl the class declaration of the property
     * @throws {IllegalModelException}
     * @private
     */
    validate(classDecl) {
        super.validate(classDecl);
    }

    /**
     * Alternative instanceof that is reliable across different module instances
     * @see https://github.com/hyperledger/composer-concerto/issues/47
     *
     * @param {object} object - The object to test against
     * @returns {boolean} - True, if the object is an instance of a EnumValueDeclaration
     */
    static [Symbol.hasInstance](object){
        return typeof object !== 'undefined' && object !== null && Boolean(object._isEnumValueDeclaration);
    }
}

module.exports = EnumValueDeclaration;