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+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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