/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

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);

    }

}