/**
* Copyright 2013 Thomas Rausch
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.rauschig.jarchivelib;
import java.io.File;
import java.io.IOException;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveOutputStream;
import org.apache.commons.compress.archivers.sevenz.SevenZFile;
import org.apache.commons.compress.archivers.sevenz.SevenZOutputFile;
/**
* Archiver to handle 7z archives. commons-compress does not handle 7z over ArchiveStreams, so we need this custom
* implementation.
* <p/>
* Basically this could disperse by adapting the CommonsStreamFactory, but this seemed more convenient as we also have
* both Input and Output stream wrappers capsuled here.
*/
class SevenZArchiver extends CommonsArchiver {
public SevenZArchiver() {
super(ArchiveFormat.SEVEN_Z);
}
@Override
protected ArchiveOutputStream createArchiveOutputStream(File archive) throws IOException {
return new SevenZOutputStream(new SevenZOutputFile(archive));
}
@Override
protected ArchiveInputStream createArchiveInputStream(File archive) throws IOException {
return new SevenZInputStream(new SevenZFile(archive));
}
/**
* Wraps a SevenZFile to make it usable as an ArchiveInputStream.
*/
static class SevenZInputStream extends ArchiveInputStream {
private SevenZFile file;
public SevenZInputStream(SevenZFile file) {
this.file = file;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
return file.read(b, off, len);
}
@Override
public org.apache.commons.compress.archivers.ArchiveEntry getNextEntry() throws IOException {
return file.getNextEntry();
}
@Override
public void close() throws IOException {
file.close();
}
}
/**
* Wraps a SevenZOutputFile to make it usable as an ArchiveOutputStream.
*/
static class SevenZOutputStream extends ArchiveOutputStream {
private SevenZOutputFile file;
public SevenZOutputStream(SevenZOutputFile file) {
this.file = file;
}
@Override
public void putArchiveEntry(org.apache.commons.compress.archivers.ArchiveEntry entry) throws IOException {
file.putArchiveEntry(entry);
}
@Override
public void closeArchiveEntry() throws IOException {
file.closeArchiveEntry();
}
@Override
public void finish() throws IOException {
file.finish();
}
@Override
public org.apache.commons.compress.archivers.ArchiveEntry createArchiveEntry(File inputFile, String entryName)
throws IOException {
return file.createArchiveEntry(inputFile, entryName);
}
@Override
public void write(int b) throws IOException {
file.write(b);
}
@Override
public void write(byte[] b) throws IOException {
file.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
file.write(b, off, len);
}
@Override
public void close() throws IOException {
file.close();
}
public SevenZOutputFile getSevenZOutputFile() {
return file;
}
}
}