content: package com.twmacinta.io;
  
  import java.io.IOException;
  import java.io.OutputStream;
  
  /**
   * Copyright (c) 2001, 2002 by Pensamos Digital, Inc., All Rights Reserved.<p>
   * <p/>
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   * <p/>
   * This library 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
   * Library General Public License for more details.
   * <p/>
   * You should have received a copy of the GNU Library General Public
   * License along with this library; if not, write to the Free
   * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   * <p/>
   * This OutputStream discards all data written to it.
   *
   * @author Tim Macinta (twm@alum.mit.edu)
   **/
  
  public class NullOutputStream extends OutputStream {
  
      private boolean closed = false;
  
      public NullOutputStream() {
      }
  
      @Override
      public void close() {
          this.closed = true;
      }
  
      @Override
      public void flush() throws IOException {
          if (this.closed) _throwClosed();
      }
  
      private void _throwClosed() throws IOException {
          throw new IOException("This OutputStream has been closed");
      }
  
      @Override
      public void write(byte[] b) throws IOException {
          if (this.closed) _throwClosed();
      }
  
      @Override
      public void write(byte[] b, int offset, int len) throws IOException {
          if (this.closed) _throwClosed();
      }
  
      @Override
      public void write(int b) throws IOException {
          if (this.closed) _throwClosed();
      }
  
  }
  