/*
* 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.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
/**
* Implements an empty {@link Transformer}. Used if no compression/encryption
* is necessary.
*
* @author Philipp C. Heckel <philipp.heckel@gmail.com>
*/
public class NoTransformer extends Transformer {
/**
* The no-transformer does not take any parameters and therefore must
* not be initialized. This method does nothing.
*/
@Override
public void init(Map<String, String> settings) throws Exception {
// Nothing here
}
@Override
public OutputStream createOutputStream(OutputStream out) throws IOException {
if (nextTransformer == null) {
return out;
}
else {
return nextTransformer.createOutputStream(out);
}
}
@Override
public InputStream createInputStream(InputStream in) throws IOException {
if (nextTransformer == null) {
return in;
}
else {
return nextTransformer.createInputStream(in);
}
}
@Override
public String toString() {
return (nextTransformer == null) ? "None" : "None-"+nextTransformer;
}
}