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A reactive Java web server.

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/*
 * Copyright (c) 1998-2015 Caucho Technology -- all rights reserved
 *
 * This file is part of Baratine(TM)(TM)
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Baratine 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.
 *
 * Baratine 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Baratine; if not, write to the
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.v5.util;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Objects;

/**
 * Murmer64 hash
 */
public class Murmur64OutputStream extends OutputStream
{
  private final OutputStream _delegate;
  private final byte[] _buffer = new byte[1];
  private long _hash;
  
  public Murmur64OutputStream(OutputStream delegate)
  {
    Objects.requireNonNull(delegate);
    
    _delegate = delegate;
    
    _hash = Murmur64.SEED;
  }
  
  @Override
  public void write(int ch)
    throws IOException
  {
    _buffer[0] = (byte) ch;
    
    write(_buffer, 0, 1);
  }
  
  @Override
  public void write(byte []buffer, int offset, int length)
    throws IOException
  {
    _delegate.write(buffer, offset, length);
    
    _hash = Murmur64.generate(_hash, buffer, offset, length);
  }
  
  public long getHash()
  {
    return _hash;
  }
    
  
  @Override
  public void flush()
    throws IOException
  {
    _delegate.flush();
  }
  
  @Override
  public void close()
    throws IOException
  {
    _delegate.close();
  }
}