/**
* 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.sevenzip;
import java.io.IOException;
import java.io.InputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.mucommander.commons.file.AbstractFile;
import com.mucommander.commons.file.UnsupportedFileOperationException;
import com.mucommander.commons.file.archive.sevenzip.provider.SevenZip.IInStream;
/**
* TODO: comment
*
* @author Arik Hadas
*/
public class MuRandomAccessFile extends IInStream {
private static final Logger LOGGER = LoggerFactory.getLogger(MuRandomAccessFile.class);
private AbstractFile file;
private InputStream stream;
private long position;
public MuRandomAccessFile(AbstractFile file) throws UnsupportedFileOperationException {
super();
position = 0;
this.file = file;
try {
stream = file.getInputStream();
} catch (IOException e) {
LOGGER.trace("Error", e);
}
}
@Override
public long Seek(long offset, int seekOrigin) throws IOException {
if (seekOrigin == STREAM_SEEK_SET) {
stream.close();
stream = file.getInputStream();
stream.skip(offset);
position = offset;
}
else if (seekOrigin == STREAM_SEEK_CUR) {
stream.skip(offset);
position += offset;
}
return position;
}
@Override
public int read() throws IOException {
int read = stream.read();
position += read;
return read;
}
@Override
public int read(byte [] data, int off, int size) throws java.io.IOException {
int read = stream.read(data, off, size);
position += read;
return read;
}
public int read(byte [] data, int size) throws java.io.IOException {
int read = stream.read(data,0,size);
position += read;
return read;
}
@Override
public void close() throws java.io.IOException {
stream.close();
}
@Override
public long skip(long offset) {
long skipped = 0;
try {
skipped = stream.skip(offset);
} catch (IOException e) {
LOGGER.trace("Error", e);
}
return skipped;
}
@Override
public int available () {
int available = 0;
try {
available = stream.available();
} catch (IOException e) {
LOGGER.trace("Error", e);
}
return available;
}
}