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/*
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* Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.zip;
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import java.io.InputStream;
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import java.io.IOException;
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/**
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* This class implements an input stream filter for reading files in the
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* ZIP file format. Includes support for both compressed and uncompressed
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* entries.
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*
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* @author David Connelly
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*/
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public
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class ZipInputStream extends InflaterInputStream implements ZipConstants {
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private final org.apidesign.bck2brwsr.emul.zip.ZipInputStream impl;
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/**
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* Creates a new ZIP input stream.
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*
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* <p>The UTF-8 {@link java.nio.charset.Charset charset} is used to
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* decode the entry names.
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*
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* @param in the actual input stream
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*/
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public ZipInputStream(InputStream in) {
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super(in);
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impl = new org.apidesign.bck2brwsr.emul.zip.ZipInputStream(in);
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}
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/**
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* Creates a new ZIP input stream.
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*
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* @param in the actual input stream
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*
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* @param charset
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* The {@linkplain java.nio.charset.Charset charset} to be
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* used to decode the ZIP entry name (ignored if the
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* <a href="package-summary.html#lang_encoding"> language
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* encoding bit</a> of the ZIP entry's general purpose bit
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* flag is set).
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*
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* @since 1.7
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*
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public ZipInputStream(InputStream in, Charset charset) {
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super(new PushbackInputStream(in, 512), new Inflater(true), 512);
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usesDefaultInflater = true;
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if(in == null) {
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throw new NullPointerException("in is null");
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}
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if (charset == null)
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throw new NullPointerException("charset is null");
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this.zc = ZipCoder.get(charset);
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}
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*/
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/**
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* Reads the next ZIP file entry and positions the stream at the
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* beginning of the entry data.
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* @return the next ZIP file entry, or null if there are no more entries
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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*/
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public ZipEntry getNextEntry() throws IOException {
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return impl.getNextEntry();
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}
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/**
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* Closes the current ZIP entry and positions the stream for reading the
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* next entry.
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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*/
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public void closeEntry() throws IOException {
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impl.closeEntry();
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}
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/**
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* Returns 0 after EOF has reached for the current entry data,
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* otherwise always return 1.
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* <p>
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* Programs should not count on this method to return the actual number
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* of bytes that could be read without blocking.
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*
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* @return 1 before EOF and 0 after EOF has reached for current entry.
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* @exception IOException if an I/O error occurs.
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*
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*/
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public int available() throws IOException {
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return impl.available();
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}
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/**
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* Reads from the current ZIP entry into an array of bytes.
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* If <code>len</code> is not zero, the method
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* blocks until some input is available; otherwise, no
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* bytes are read and <code>0</code> is returned.
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* @param b the buffer into which the data is read
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* @param off the start offset in the destination array <code>b</code>
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* @param len the maximum number of bytes read
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* @return the actual number of bytes read, or -1 if the end of the
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* entry is reached
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* @exception NullPointerException if <code>b</code> is <code>null</code>.
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* @exception IndexOutOfBoundsException if <code>off</code> is negative,
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* <code>len</code> is negative, or <code>len</code> is greater than
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* <code>b.length - off</code>
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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*/
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public int read(byte[] b, int off, int len) throws IOException {
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return impl.read(b, off, len);
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}
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/**
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* Skips specified number of bytes in the current ZIP entry.
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* @param n the number of bytes to skip
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* @return the actual number of bytes skipped
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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* @exception IllegalArgumentException if n < 0
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*/
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public long skip(long n) throws IOException {
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return impl.skip(n);
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}
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/**
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* Closes this input stream and releases any system resources associated
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* with the stream.
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* @exception IOException if an I/O error has occurred
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*/
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public void close() throws IOException {
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impl.close();
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}
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/**
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* Creates a new <code>ZipEntry</code> object for the specified
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* entry name.
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*
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* @param name the ZIP file entry name
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* @return the ZipEntry just created
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*/
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protected ZipEntry createZipEntry(String name) {
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return new ZipEntry(name);
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}
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@Override
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public int read() throws IOException {
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return impl.read();
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}
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@Override
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public boolean markSupported() {
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return impl.markSupported();
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}
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@Override
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public void mark(int readlimit) {
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impl.mark(readlimit);
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}
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@Override
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public void reset() throws IOException {
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impl.reset();
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}
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@Override
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public int read(byte[] b) throws IOException {
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return impl.read(b);
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}
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}
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