001 /**
002 * ========================================
003 * JFreeReport : a free Java report library
004 * ========================================
005 *
006 * Project Info: http://reporting.pentaho.org/
007 *
008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009 *
010 * This library is free software; you can redistribute it and/or modify it under the terms
011 * of the GNU Lesser General Public License as published by the Free Software Foundation;
012 * either version 2.1 of the License, or (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016 * See the GNU Lesser General Public License for more details.
017 *
018 * You should have received a copy of the GNU Lesser General Public License along with this
019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307, USA.
021 *
022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023 * in the United States and other countries.]
024 *
025 * ------------
026 * $Id: NoCloseOutputStream.java,v 1.8 2007/04/01 18:49:33 taqua Exp $
027 * ------------
028 * (C) Copyright 2000-2005, by Object Refinery Limited.
029 * (C) Copyright 2005-2007, by Pentaho Corporation.
030 */
031 package org.jfree.report.util;
032
033 import java.io.FilterOutputStream;
034 import java.io.IOException;
035 import java.io.OutputStream;
036
037 /**
038 * A Wrapper stream that does never calls close on its parent. This implementation is
039 * needed when creating ZipOutputStream, as the final ZipDirectory is written when close
040 * is called on the ZipOutputSteam.
041 *
042 * @author Thomas Morgner
043 */
044 public class NoCloseOutputStream extends FilterOutputStream
045 {
046 /**
047 * Create a new NoCloseOutputStream with the given output stream a parent.
048 *
049 * @param out the parent stream
050 */
051 public NoCloseOutputStream (final OutputStream out)
052 {
053 super(out);
054 if (out == null)
055 {
056 throw new NullPointerException("Given Output Stream is null!");
057 }
058 }
059
060 /**
061 * Closes this output stream and releases any system resources associated with the
062 * stream, but does not close the underlying output stream.
063 * <p/>
064 * The <code>close</code> method of <code>FilterOutputStream</code> calls its
065 * <code>flush</code> method.
066 *
067 * @throws IOException if an I/O error occurs.
068 * @see FilterOutputStream#flush()
069 * @see FilterOutputStream#out
070 */
071 public void close ()
072 throws IOException
073 {
074 flush();
075 // do not close the parent stream ... !
076 }
077 }