/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program 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; version 2 of the License.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Feb 10, 2009
*/
package com.bigdata.io;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
/**
* Implementation that will not re-open the {@link FileChannel} once it has been
* closed. This is useful for simple things where you still want the reliability
* guarantees of {@link FileChannelUtility}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class NOPReopener implements IReopenChannel<FileChannel> {
private final FileChannel channel;
public NOPReopener(final FileChannel channel) {
if (channel == null)
throw new IllegalArgumentException();
this.channel = channel;
}
public NOPReopener(final RandomAccessFile raf) {
if (raf == null)
throw new IllegalArgumentException();
this.channel = raf.getChannel();
}
public FileChannel reopenChannel() throws IOException {
if (!channel.isOpen())
throw new IOException("Channel is closed.");
return channel;
}
}