/**
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* muCommander 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.commons.file.archive.gzip;
import com.mucommander.commons.file.*;
import com.mucommander.commons.file.archive.AbstractROArchiveFile;
import com.mucommander.commons.file.archive.ArchiveEntry;
import com.mucommander.commons.file.archive.ArchiveEntryIterator;
import com.mucommander.commons.file.archive.SingleArchiveEntryIterator;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
/**
* GzipArchiveFile provides read-only access to archives in the Gzip format.
*
* <p>The actual decompression work is performed by the {@link java.util.zip.GZIPInputStream} class.</p>
*
* @see com.mucommander.commons.file.archive.gzip.GzipFormatProvider
* @author Maxence Bernard
*/
public class GzipArchiveFile extends AbstractROArchiveFile {
/**
* Creates a GzipArchiveFile on top of the given file.
*
* @param file the underlying file to wrap this archive file around
*/
public GzipArchiveFile(AbstractFile file) {
super(file);
}
////////////////////////////////////////
// AbstractArchiveFile implementation //
////////////////////////////////////////
@Override
public ArchiveEntryIterator getEntryIterator() throws IOException {
String extension = getCustomExtension() != null ? getCustomExtension() : getExtension();
String name = getName();
if(extension!=null) {
// Remove the 'gz' or 'tgz' extension from the entry's name
switch(extension.toLowerCase()) {
case "tgz":
name = name.substring(0, name.length()-3)+"tar";
break;
case "gz":
name = name.substring(0, name.length()-3);
break;
default:
}
}
return new SingleArchiveEntryIterator(new ArchiveEntry("/"+name, false, getDate(), -1, true));
}
@Override
public InputStream getEntryInputStream(ArchiveEntry entry, ArchiveEntryIterator entryIterator) throws IOException, UnsupportedFileOperationException {
return new GZIPInputStream(getInputStream());
}
}