/*

  * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code 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 General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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  */

 package java.util.zip;

 import java.io.InputStream;

 import java.io.IOException;

 /**

  * This class implements an input stream filter for reading files in the

  * ZIP file format. Includes support for both compressed and uncompressed

  * entries.

  *

  * @author      David Connelly

  */

 public

 class ZipInputStream extends InflaterInputStream implements ZipConstants {

     private final org.apidesign.bck2brwsr.emul.zip.ZipInputStream impl;

     /**

      * Creates a new ZIP input stream.

      *

      * <p>The UTF-8 {@link java.nio.charset.Charset charset} is used to

      * decode the entry names.

      *

      * @param in the actual input stream

      */

     public ZipInputStream(InputStream in) {

         super(null);

         impl = new org.apidesign.bck2brwsr.emul.zip.ZipInputStream(in);

     }

     /**

      * Creates a new ZIP input stream.

      *

      * @param in the actual input stream

      *

      * @param charset

      *        The {@linkplain java.nio.charset.Charset charset} to be

      *        used to decode the ZIP entry name (ignored if the

      *        <a href="package-summary.html#lang_encoding"> language

      *        encoding bit</a> of the ZIP entry's general purpose bit

      *        flag is set).

      *

      * @since 1.7

      *

     public ZipInputStream(InputStream in, Charset charset) {

         super(new PushbackInputStream(in, 512), new Inflater(true), 512);

         usesDefaultInflater = true;

         if(in == null) {

             throw new NullPointerException("in is null");

         }

         if (charset == null)

             throw new NullPointerException("charset is null");

         this.zc = ZipCoder.get(charset);

     }

     */

     /**

      * Reads the next ZIP file entry and positions the stream at the

      * beginning of the entry data.

      * @return the next ZIP file entry, or null if there are no more entries

      * @exception ZipException if a ZIP file error has occurred

      * @exception IOException if an I/O error has occurred

      */

     public ZipEntry getNextEntry() throws IOException {

         return impl.getNextEntry();

     }

     /**

      * Closes the current ZIP entry and positions the stream for reading the

      * next entry.

      * @exception ZipException if a ZIP file error has occurred

      * @exception IOException if an I/O error has occurred

      */

     public void closeEntry() throws IOException {

         impl.closeEntry();

     }

     /**

      * Returns 0 after EOF has reached for the current entry data,

      * otherwise always return 1.

      * <p>

      * Programs should not count on this method to return the actual number

      * of bytes that could be read without blocking.

      *

      * @return     1 before EOF and 0 after EOF has reached for current entry.

      * @exception  IOException  if an I/O error occurs.

      *

      */

     public int available() throws IOException {

         return impl.available();

     }

     /**

      * Reads from the current ZIP entry into an array of bytes.

      * If <code>len</code> is not zero, the method

      * blocks until some input is available; otherwise, no

      * bytes are read and <code>0</code> is returned.

      * @param b the buffer into which the data is read

      * @param off the start offset in the destination array <code>b</code>

      * @param len the maximum number of bytes read

      * @return the actual number of bytes read, or -1 if the end of the

      *         entry is reached

      * @exception  NullPointerException if <code>b</code> is <code>null</code>.

      * @exception  IndexOutOfBoundsException if <code>off</code> is negative,

      * <code>len</code> is negative, or <code>len</code> is greater than

      * <code>b.length - off</code>

      * @exception ZipException if a ZIP file error has occurred

      * @exception IOException if an I/O error has occurred

      */

     public int read(byte[] b, int off, int len) throws IOException {

         return impl.read(b, off, len);

     }

     /**

      * Skips specified number of bytes in the current ZIP entry.

      * @param n the number of bytes to skip

      * @return the actual number of bytes skipped

      * @exception ZipException if a ZIP file error has occurred

      * @exception IOException if an I/O error has occurred

      * @exception IllegalArgumentException if n < 0

      */

     public long skip(long n) throws IOException {

         return impl.skip(n);

     }

     /**

      * Closes this input stream and releases any system resources associated

      * with the stream.

      * @exception IOException if an I/O error has occurred

      */

     public void close() throws IOException {

         impl.close();

     }

     /**

      * Creates a new <code>ZipEntry</code> object for the specified

      * entry name.

      *

      * @param name the ZIP file entry name

      * @return the ZipEntry just created

      */

     protected ZipEntry createZipEntry(String name) {

         return new ZipEntry(name);

     }

     @Override

     public int read() throws IOException {

         return impl.read();

     }

     @Override

     public boolean markSupported() {

         return impl.markSupported();

     }

     @Override

     public void mark(int readlimit) {

         impl.mark(readlimit);

     }

     @Override

     public void reset() throws IOException {

         impl.reset();

     }

     @Override

     public int read(byte[] b) throws IOException {

         return impl.read(b);

     }

 }