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 3048 2007-07-28 18:02:42Z tmorgner $ 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 }