Source for gnu.java.nio.OutputStreamChannel

   1: /* OutputStreamChannel.java --
   2:    Copyright (C) 2003 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.nio;
  40: 
  41: import java.io.IOException;
  42: import java.io.OutputStream;
  43: import java.nio.ByteBuffer;
  44: import java.nio.channels.ClosedChannelException;
  45: import java.nio.channels.WritableByteChannel;
  46: 
  47: /**
  48:  * @author Michael Koch
  49:  */
  50: public final class OutputStreamChannel implements WritableByteChannel
  51: {
  52:   private boolean closed = false;
  53:   private OutputStream out;
  54: 
  55:   public OutputStreamChannel (OutputStream out)
  56:   {
  57:     super();
  58: 
  59:     this.out = out;
  60:   }
  61: 
  62:   public void close() throws IOException
  63:   {
  64:     if (!closed)
  65:       {
  66:         out.close();
  67:         closed = true;
  68:       }
  69:   }
  70: 
  71:   public boolean isOpen()
  72:   {
  73:     return !closed;
  74:   }
  75: 
  76:   public int write (ByteBuffer src) throws IOException
  77:   {
  78:     if (!isOpen())
  79:       throw new ClosedChannelException();
  80: 
  81:     int len = src.remaining();
  82:     byte[] buffer = new byte [len];
  83:     src.get (buffer);
  84:     out.write (buffer);
  85:     return len;
  86:   }
  87: }