001/*
002 * #%L
003 * Netarchivesuite - common
004 * %%
005 * Copyright (C) 2005 - 2014 The Royal Danish Library, the Danish State and University Library,
006 *             the National Library of France and the Austrian National Library.
007 * %%
008 * This program is free software: you can redistribute it and/or modify
009 * it under the terms of the GNU Lesser General Public License as
010 * published by the Free Software Foundation, either version 2.1 of the
011 * License, or (at your option) any later version.
012 * 
013 * This program is distributed in the hope that it will be useful,
014 * but WITHOUT ANY WARRANTY; without even the implied warranty of
015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
016 * GNU General Lesser Public License for more details.
017 * 
018 * You should have received a copy of the GNU General Lesser Public
019 * License along with this program.  If not, see
020 * <http://www.gnu.org/licenses/lgpl-2.1.html>.
021 * #L%
022 */
023
024package dk.netarkivet.common.utils;
025
026import org.apache.commons.httpclient.URIException;
027import org.archive.url.UsableURI;
028
029/**
030 * Fixed UURI which extends UURI to fix an NPE bug in getReferencedHost.
031 * <p>
032 * Pending fix of bug in Heritrix. The bug has been reported, and has number 616:
033 * http://webteam.archive.org/jira/browse/HER-616
034 */
035@SuppressWarnings({"serial"})
036public class FixedUURI extends UsableURI {
037
038    protected FixedUURI() {
039        super();
040    }
041
042    protected FixedUURI(String string, boolean b, String string1) throws URIException {
043        super(string, b, string1);
044    }
045
046    protected FixedUURI(UsableURI uuri, UsableURI uuri1) throws URIException {
047        super(uuri, uuri1);
048    }
049
050    public FixedUURI(String string, boolean b) throws URIException {
051        super(string, b);
052    }
053
054    /**
055     * Return the hostname for this URI, giving the looked-up host on dns-URLS.
056     *
057     * @return hostname for this URI, or null if this cannot be calculated.
058     * @throws URIException on serious parse errors.
059     * @see UURI#getReferencedHost()
060     */
061    public String getReferencedHost() throws URIException {
062        if (getHost() == null && getScheme() == null) {
063            return null;
064        }
065        return super.getReferencedHost();
066    }
067
068}