1 /** 2 * The utillib library. 3 * More information is available at http://www.jinchess.com/. 4 * Copyright (C) 2003 Alexander Maryanovsky. 5 * All rights reserved. 6 * 7 * The utillib library is free software; you can redistribute 8 * it and/or modify it under the terms of the GNU Lesser General Public License 9 * as published by the Free Software Foundation; either version 2 of the 10 * License, or (at your option) any later version. 11 * 12 * The utillib library is distributed in the hope that it will 13 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public License 18 * along with utillib library; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 package free.util; 23 24 import java.util.Hashtable; 25 import java.net.URLStreamHandlerFactory; 26 import java.net.URLStreamHandler; 27 28 29 /** 30 * An implementation of <code>URLStreamHandlerFactory</code> which maps protocol 31 * names to instances of <code>URLStreamHandlerFactory</code> with a simple 32 * hashtable. 33 */ 34 35 public class MapURLStreamHandlerFactory implements URLStreamHandlerFactory{ 36 37 38 39 /** 40 * A hashtable mapping protocol names to instances of 41 * <code>URLStreamHandler</code> which handle that protocol. 42 */ 43 44 private final Hashtable handlers = new Hashtable(); 45 46 47 48 /** 49 * Creates a new, empty, <code>MapURLStreamHandlerFactory</code>. 50 */ 51 MapURLStreamHandlerFactory()52 public MapURLStreamHandlerFactory(){ 53 54 } 55 56 57 58 /** 59 * Sets the specified protocol to be handled by the specified 60 * <code>URLStreamHandler</code>. The protocol name is case insensitive. 61 */ 62 setHandler(String protocol, URLStreamHandler handler)63 public void setHandler(String protocol, URLStreamHandler handler){ 64 handlers.put(protocol.toLowerCase(), handler); 65 } 66 67 68 69 /** 70 * Returns the <code>URLStreamHandler</code> for the specified protocol. 71 */ 72 getHandler(String protocol)73 public URLStreamHandler getHandler(String protocol){ 74 return (URLStreamHandler)handlers.get(protocol.toLowerCase()); 75 } 76 77 78 79 /** 80 * Returns the <code>URLStreamHandler</code> for the specified protocol by 81 * delegating to <code>getHandler(String protocol)</code>. 82 */ 83 createURLStreamHandler(String protocol)84 public URLStreamHandler createURLStreamHandler(String protocol){ 85 return getHandler(protocol); 86 } 87 88 89 90 } 91