enumHandler.ts

import { DataType } from "../common/types";

/*
 * Copyright (C) 2018 Centro de Computacao Cientifica e Software Livre
 * Departamento de Informatica - Universidade Federal do Parana
 *
 * This file is part of blendb.
 *
 * blendb is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * blendb is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with blendb.  If not, see <http://www.gnu.org/licenses/>.
 */

import { EnumType } from "../core/enumType";

/**
 * Enum's handler. Manage changes between
 * string , datatype and enumtype.
 */
export class EnumHandler {

    /**
     * Checks if it's a valid datatype, otherwise will be an enumtype
     * @param dt datatype to compare, used as return if comparation succeed
     * @param en enumtype as return if comparation fails
     */
    public static selectDataType(dt: DataType , en: string): string{
        return (dt !== DataType.NONE) ? EnumType.stringfyDataType(dt) : en;
    }

    /**
     * Checks if it's a valid datatype, otherwise return an empity string 
     * @param data datatype to compare, used as return if comparation succeed
     */
    public static selectEnumType(dt: string): string{
        return (EnumType.parseDataType(dt) === DataType.NONE) ? dt : "";
    }

}