001/*
002 * Stallion Core: A Modern Web Framework
003 *
004 * Copyright (C) 2015 - 2016 Stallion Software LLC.
005 *
006 * This program is free software: you can redistribute it and/or modify it under the terms of the
007 * GNU General Public License as published by the Free Software Foundation, either version 2 of
008 * the License, or (at your option) any later version. This program is distributed in the hope that
009 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
010 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
011 * License for more details. You should have received a copy of the GNU General Public License
012 * along with this program.  If not, see <http://www.gnu.org/licenses/gpl-2.0.html>.
013 *
014 *
015 *
016 */
017
018package io.stallion.tools;
019
020import java.util.List;
021
022import static io.stallion.utils.Literals.list;
023
024
025public class ExporterRegistry {
026    private static ExporterRegistry _instance;
027    public static ExporterRegistry instance() {
028        if (_instance == null) {
029            _instance = new ExporterRegistry();
030        }
031        return _instance;
032    }
033
034    private List<Exporter> exporters = list();
035
036    public ExporterRegistry register(Exporter exporter) {
037        this.exporters.add(exporter);
038        return this;
039    }
040
041    public List<String> exportAll() {
042        List<String> combined = list();
043        for(Exporter exporter: exporters) {
044            combined.addAll(exporter.listUrls());
045        }
046        return combined;
047    }
048
049}