/* TeeWriter.java
   Copyright (C) 2006  Free Software Foundation, Inc.

This file is a part of GNU Classpath.

GNU Classpath 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; either version 2 of the License, or (at
your option) any later version.

GNU Classpath 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 GNU Classpath; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under terms
of your choice, provided that you also meet, for each linked independent
module, the terms and conditions of the license of that module.  An
independent module is a module which is not derived from or based on
this library.  If you modify this library, you may extend this exception
to your version of the library, but you are not obligated to do so.  If
you do not wish to do so, delete this exception statement from your
version.  */

package gnu.classpath.debug;

import java.io.*;

/**
 * A writer that copies all its output to an additional character sink.
 *
 * @author Chris Burdess
 */
public class TeeWriter
  extends Writer
{

  private final Writer out;
  private final Writer sink;

  /**
   * Constructs a tee writer.
   * @param out the underlying writer
   * @param sink the output sink
   */
  public TeeWriter(Writer out, Writer sink)
  {
    this.out = out;
    this.sink = sink;
  }

  public void write(int c)
    throws IOException
  {
    out.write(c);
    sink.write(c);
  }

  public void write(char[] b, int off, int len)
    throws IOException
  {
    out.write(b, off, len);
    sink.write(b, off, len);
  }

  public void flush()
    throws IOException
  {
    out.flush();
    sink.flush();
  }

  public void close()
    throws IOException
  {
    out.close();
    sink.close();
  }

}
