| /* Handler.java -- "file" protocol handler for java.net |
| Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.java.net.protocol.file; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.net.URLStreamHandler; |
| |
| /** |
| * This is the protocol handler for the "file" protocol. |
| * It implements the abstract openConnection() method from |
| * URLStreamHandler by returning a new FileURLConnection object (from |
| * this package). All other methods are inherited |
| * |
| * @author Aaron M. Renn (arenn@urbanophile.com) |
| * @author Warren Levy <warrenl@cygnus.com> |
| */ |
| public class Handler extends URLStreamHandler |
| { |
| /** |
| * A do nothing constructor |
| */ |
| public Handler() |
| { |
| } |
| |
| /** |
| * This method returs a new FileURLConnection for the specified URL |
| * |
| * @param url The URL to return a connection for |
| * |
| * @return The URLConnection |
| * |
| * @exception IOException If an error occurs |
| */ |
| protected URLConnection openConnection(URL url) throws IOException |
| { |
| // If a hostname is set, then we need to switch protocols to ftp |
| // in order to transfer this from the remote host. |
| String host = url.getHost(); |
| if ((host != null) && (! host.equals(""))) |
| { |
| // Reset the protocol (and implicitly the handler) for this URL. |
| // Then have the URL attempt the connection again, as it will |
| // get the changed handler the next time around. |
| // If the ftp protocol handler is not installed, an |
| // exception will be thrown from the new openConnection() call. |
| setURL (url, "ftp", url.getHost(), url.getPort(), url.getFile(), |
| url.getRef()); |
| return url.openConnection(); |
| } |
| |
| return new Connection(url); |
| } |
| } // class Handler |