/**

  * Distribution License:

  * JSword is free software; you can redistribute it and/or modify it under

  * the terms of the GNU Lesser General Public License, version 2.1 or later

  * as published by the Free Software Foundation. This program 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 Lesser General Public License for more details.

  *

  * The License is available on the internet at:

  *      http://www.gnu.org/copyleft/lgpl.html

  * or by writing to:

  *      Free Software Foundation, Inc.

  *      59 Temple Place - Suite 330

  *      Boston, MA 02111-1307, USA

  *

  * © CrossWire Bible Society, 2007 - 2016

  *

  */

 package org.crosswire.common.compress;

 import java.io.BufferedInputStream;

 import java.io.ByteArrayOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.zip.Deflater;

 import java.util.zip.DeflaterOutputStream;

 import java.util.zip.Inflater;

 import java.util.zip.InflaterInputStream;

 /**

  * Zip manages the compression and uncompression of Zip files.

  * 

  * @see gnu.lgpl.License The GNU Lesser General Public License for details.

  * @author DM Smith

  */

 public class Zip extends AbstractCompressor {

     /**

      * Create a Zip that is capable of transforming the input.

      * 

      * @param input

      *            to compress or uncompress.

      */

     public Zip(InputStream input) {

         super(input);

     }

     /*

      * (non-Javadoc)

      * 

      * @see org.crosswire.common.compress.Compressor#compress()

      */

     public ByteArrayOutputStream compress() throws IOException {

         BufferedInputStream in = new BufferedInputStream(input);

         ByteArrayOutputStream bos = new ByteArrayOutputStream();

         DeflaterOutputStream out = new DeflaterOutputStream(bos, new Deflater(), BUF_SIZE);

         byte[] buf = new byte[BUF_SIZE];

         for (int count = in.read(buf); count != -1; count = in.read(buf)) {

             out.write(buf, 0, count);

         }

         in.close();

         out.flush();

         out.close();

         return bos;

     }

     /*

      * (non-Javadoc)

      * 

      * @see org.crosswire.common.compress.Compressor#uncompress()

      */

     public ByteArrayOutputStream uncompress() throws IOException {

         return uncompress(BUF_SIZE);

     }

     /*

      * (non-Javadoc)

      * 

      * @see org.crosswire.common.compress.Compressor#uncompress(int)

      */

     public ByteArrayOutputStream uncompress(int expectedLength) throws IOException {

         ByteArrayOutputStream out = new ByteArrayOutputStream(expectedLength);

         InflaterInputStream in = new InflaterInputStream(input, new Inflater(), expectedLength);

         byte[] buf = new byte[expectedLength];

         for (int count = in.read(buf); count != -1; count = in.read(buf)) {

             out.write(buf, 0, count);

         }

         in.close();

         out.flush();

         out.close();

         return out;

     }

 }