ZOutputStream.java

/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/*
Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.

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

  1. Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.

  2. 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.

  3. The names of the authors may not be used to endorse or promote products
     derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jcraft.jzlib;
import java.io.*;

/**
 * ZOutputStream
 *
 * @deprecated  use DeflaterOutputStream or InflaterInputStream
 */
@Deprecated
public class ZOutputStream extends FilterOutputStream {

  protected int bufsize=512;
  protected int flush=JZlib.Z_NO_FLUSH;
  protected byte[] buf=new byte[bufsize];
  protected boolean compress;

  protected OutputStream out;
  private boolean end=false;

  private DeflaterOutputStream dos;
  private Inflater inflater;

  public ZOutputStream(OutputStream out) throws IOException {
    super(out);
    this.out=out;
    inflater = new Inflater();
    inflater.init();
    compress=false;
  }

  public ZOutputStream(OutputStream out, int level) throws IOException {
    this(out, level, false);
  }

  public ZOutputStream(OutputStream out, int level, boolean nowrap) throws IOException {
    super(out);
    this.out=out;
    Deflater deflater = new Deflater(level, nowrap);
    dos = new DeflaterOutputStream(out, deflater);
    compress=true;
  }

  private byte[] buf1 = new byte[1];
  public void write(int b) throws IOException {
    buf1[0]=(byte)b;
    write(buf1, 0, 1);
  }

  public void write(byte b[], int off, int len) throws IOException {
    if(len==0) return;
    if(compress){
      dos.write(b, off, len);
    }
    else {
      inflater.setInput(b, off, len, true);
      int err = JZlib.Z_OK;
      while(inflater.avail_in>0){
        inflater.setOutput(buf, 0, buf.length);
        err = inflater.inflate(flush);
        if(inflater.next_out_index>0)
          out.write(buf, 0, inflater.next_out_index);
        if(err != JZlib.Z_OK)
          break;
      }
      if(err != JZlib.Z_OK)
        throw new ZStreamException("inflating: "+inflater.msg);
      return;
    }
  }

  public int getFlushMode() {
    return flush;
  }

  public void setFlushMode(int flush) {
    this.flush=flush;
  }

  public void finish() throws IOException {
    int err;
    if(compress){
      int tmp = flush;
      int flush = JZlib.Z_FINISH;
      try{
        write("".getBytes(), 0, 0);
      }
      finally { flush = tmp; }
    }
    else{
      dos.finish();
    }
    flush();
  }
  public synchronized void end() {
    if(end) return;
    if(compress){
      try { dos.finish(); } catch(Exception e){}
    }
    else{
      inflater.end();
    }
    end=true;
  }
  public void close() throws IOException {
    try{
      try{finish();}
      catch (IOException ignored) {}
    }
    finally{
      end();
      out.close();
      out=null;
    }
  }

  public long getTotalIn() {
    if(compress) return dos.getTotalIn();
    else return inflater.total_in;
  }

  public long getTotalOut() {
    if(compress) return dos.getTotalOut();
    else return inflater.total_out;
  }

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

}