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/*
 * Licensed to Jörg Prante and xbib under one or more contributor
 * license agreements. See the NOTICE.txt file distributed with this work
 * for additional information regarding copyright ownership.
 *
 * Copyright (C) 2012 Jörg Prante and xbib
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published
 * by the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses
 * or write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * The interactive user interfaces in modified source and object code
 * versions of this program must display Appropriate Legal Notices,
 * as required under Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public
 * License, these Appropriate Legal Notices must retain the display of the
 * "Powered by xbib" logo. If the display of the logo is not reasonably
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by xbib".
 */
package org.xbib.io;

import java.net.URLStreamHandler;
import java.net.URLStreamHandlerFactory;
import java.util.HashMap;
import java.util.Map;
import java.util.ServiceLoader;

public class CustomURLStreamHandlerFactory implements URLStreamHandlerFactory {

    private final static Map protocolHandlers = new HashMap<>();

    private final static CustomURLStreamHandlerFactory factory = new CustomURLStreamHandlerFactory();

    public CustomURLStreamHandlerFactory() {
        ServiceLoader serviceLoader = ServiceLoader.load(CustomURLStreamHandler.class);
        for (CustomURLStreamHandler handler : serviceLoader) {
            if (!protocolHandlers.containsKey(handler.getName())) {
                protocolHandlers.put(handler.getName(), handler);
            }
        }
    }

    public static CustomURLStreamHandlerFactory getFactory() {
        return factory;
    }

    public void addHandler(String protocol, CustomURLStreamHandler urlHandler) {
        protocolHandlers.put(protocol, urlHandler);
    }

    @Override
    public URLStreamHandler createURLStreamHandler(String protocol) {
        return protocolHandlers.get(protocol);
    }
}