mirror of git://gcc.gnu.org/git/gcc.git
138 lines
3.6 KiB
Java
138 lines
3.6 KiB
Java
/* URLDataSource.java -- Data source for a URL object.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.activation;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.net.URL;
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import java.net.URLConnection;
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/**
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* DataSource implementation that retrieves its data from a URL.
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*
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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* @version 1.1
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*/
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public class URLDataSource
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implements DataSource
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{
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private final URL url;
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private URLConnection connection;
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/**
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* Constructor.
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* This will not open the connection to the URL.
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*/
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public URLDataSource(URL url)
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{
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this.url = url;
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}
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/**
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* Returns the Content-Type header for the URL.
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* In the case of failure or lack of such a header,
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* returns "application/octet-stream".
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*/
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public String getContentType()
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{
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try
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{
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if (connection == null)
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{
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connection = url.openConnection();
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}
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}
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catch (IOException e)
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{
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}
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String contentType = null;
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if (connection != null)
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{
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contentType = connection.getContentType();
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}
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if (contentType == null)
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{
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contentType = "application/octet-stream";
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}
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return contentType;
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}
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/**
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* Returns the result of <code>getFile</code> of the underlying URL.
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*/
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public String getName()
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{
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return url.getFile();
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}
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public InputStream getInputStream()
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throws IOException
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{
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connection = url.openConnection();
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if (connection != null)
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{
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connection.setDoInput(true);
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return connection.getInputStream();
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}
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return null;
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}
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public OutputStream getOutputStream()
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throws IOException
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{
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connection = url.openConnection();
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if (connection != null)
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{
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connection.setDoOutput(true);
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return connection.getOutputStream();
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}
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return null;
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}
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/**
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* Returns the underlying URL.
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*/
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public URL getURL()
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{
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return url;
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}
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}
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