OutputStreamSplitter.java from DrJava at Krugle

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/*BEGIN_COPYRIGHT_BLOCK*

PLT Utilities BSD License

Copyright (c) 2007 JavaPLT group at Rice University
All rights reserved.

Developed by:   Java Programming Languages Team
                Rice University
                http://www.cs.rice.edu/~javaplt/

Redistribution and use in source and binary forms, with or without modification, are permitted 
provided that the following conditions are met:

    - Redistributions of source code must retain the above copyright notice, this list of conditions 
      and the following disclaimer.
    - Redistributions in binary form must reproduce the above copyright notice, this list of 
      conditions and the following disclaimer in the documentation and/or other materials provided 
      with the distribution.
    - Neither the name of the JavaPLT group, Rice University, nor the names of the library's 
      contributors may be used to endorse or promote products derived from this software without 
      specific prior written permission.

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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND 
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package edu.rice.cs.plt.io;

import java.io.OutputStream;
import java.io.IOException;
import edu.rice.cs.plt.iter.IterUtil;

/** An output stream that allows sending the same data to an arbitrary number of streams. */
public class OutputStreamSplitter extends DirectOutputStream {
  
  private final Iterable<? extends OutputStream> _streams;
  
  public OutputStreamSplitter(OutputStream... streams) { _streams = IterUtil.asIterable(streams); }
  
  public OutputStreamSplitter(Iterable<? extends OutputStream> streams) { _streams = streams; }
  
  @Override public void close() throws IOException {
    for (OutputStream s : _streams) { s.close(); }
  }
  
  @Override public void flush() throws IOException {
    for (OutputStream s : _streams) { s.flush(); }
  }
  
  @Override public void write(byte[] bytes) throws IOException {
    for (OutputStream s : _streams) { s.write(bytes); }
  }
  
  @Override public void write(byte[] bytes, int off, int len) throws IOException {
    for (OutputStream s : _streams) { s.write(bytes, off, len); }
  }
  
  @Override public void write(int b) throws IOException {
    for (OutputStream s : _streams) { s.write(b); }
  }
  
}
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