ZipMultiChunk.java
/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2016 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.chunk;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.syncany.database.MultiChunkEntry.MultiChunkId;
import org.syncany.util.StringUtil;
/**
*
* @author Philipp C. Heckel (philipp.heckel@gmail.com)
*/
public class ZipMultiChunk extends MultiChunk {
private ZipOutputStream zipOut;
private ZipInputStream zipIn;
private ZipFile zipFile;
public ZipMultiChunk(InputStream is) {
super(0);
this.zipIn = new ZipInputStream(is);
}
public ZipMultiChunk(File file) throws ZipException, IOException {
super(0);
this.zipFile = new ZipFile(file);
}
public ZipMultiChunk(MultiChunkId id, int minSize, OutputStream os) throws IOException {
super(id, minSize);
this.zipOut = new ZipOutputStream(os);
this.zipOut.setLevel(ZipOutputStream.STORED); // No compression
}
@Override
public boolean isFull() {
return size >= minSize*1024; // minSize is in KB!
}
@Override
public void write(Chunk chunk) throws IOException {
size += chunk.getSize();
ZipEntry entry = new ZipEntry(StringUtil.toHex(chunk.getChecksum()));
entry.setSize(chunk.getSize());
zipOut.putNextEntry(entry);
zipOut.write(chunk.getContent(), 0, chunk.getSize());
zipOut.closeEntry();
}
@Override
public InputStream getChunkInputStream(byte[] checksum) throws IOException {
ZipEntry chunkEntry = zipFile.getEntry(StringUtil.toHex(checksum));
InputStream chunkInputStream = zipFile.getInputStream(chunkEntry);
return chunkInputStream;
}
@Override
public Chunk read() throws IOException {
ZipEntry entry = zipIn.getNextEntry();
if (entry == null) {
return null;
}
int read;
ByteArrayOutputStream contentByteArray = new ByteArrayOutputStream();
while (-1 != (read = zipIn.read())) {
contentByteArray.write(read);
}
return new Chunk(StringUtil.fromHex(entry.getName()), contentByteArray.toByteArray(), contentByteArray.size(), null);
}
@Override
public long getSize() {
return size;
}
@Override
public void close() throws IOException {
if (zipOut != null) {
zipOut.close();
}
if (zipIn != null) {
zipIn.close();
}
if (zipFile != null) {
zipFile.close();
}
}
}