messageinputstream.java

JAVA网络编程技术内幕一书的源代码

/*
 * Java Network Programming, Second Edition
 * Merlin Hughes, Michael Shoffner, Derek Hamner
 * Manning Publications Company; ISBN 188477749X
 *
 * http://nitric.com/jnp/
 *
 * Copyright (c) 1997-1999 Merlin Hughes, Michael Shoffner, Derek Hamner;
 * all rights reserved; see license.txt for details.
 */

import java.io.*;

public class MessageInputStream extends MessageInput {
  protected InputStream rawIn;
  protected DataInputStream dataIn;
  
  public MessageInputStream (InputStream in) {
    super (new ByteArrayInputStream (new byte[0]));
    rawIn = in;
    dataIn = new DataInputStream (rawIn);
  }

  public void receive () throws IOException {
    synchronized (rawIn) {
      int length = dataIn.readInt ();
      byte[] buffer = new byte[length];
      dataIn.readFully (buffer);
      in = new ByteArrayInputStream (buffer);
    }
  }
}