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package de.lmu.ifi.dbs.elki.result.textwriter;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.zip.GZIPOutputStream;
/**
* Class to output all result data to a single stream (e.g. Stdout, single file)
*
* @author Erich Schubert
*
*/
public class SingleStreamOutput implements StreamFactory {
/**
* Output stream
*/
private PrintStream stream;
/**
* Constructor using stdout.
* @throws IOException on IO error
*/
public SingleStreamOutput() throws IOException {
this(FileDescriptor.out);
}
/**
* Constructor using stdout
*
* @param gzip Use gzip compression
* @throws IOException on IO error
*/
public SingleStreamOutput(boolean gzip) throws IOException {
this(FileDescriptor.out, gzip);
}
/**
* Constructor with given file name.
*
* @param out filename
* @throws IOException on IO error
*/
public SingleStreamOutput(File out) throws IOException {
this(new FileOutputStream(out));
}
/**
* Constructor with given file name.
*
* @param out filename
* @param gzip Use gzip compression
* @throws IOException on IO error
*/
public SingleStreamOutput(File out, boolean gzip) throws IOException {
this(new FileOutputStream(out), gzip);
}
/**
* Constructor with given FileDescriptor
*
* @param out file descriptor
* @throws IOException on IO error
*/
public SingleStreamOutput(FileDescriptor out) throws IOException {
this(new FileOutputStream(out));
}
/**
* Constructor with given FileDescriptor
*
* @param out file descriptor
* @param gzip Use gzip compression
* @throws IOException on IO error
*/
public SingleStreamOutput(FileDescriptor out, boolean gzip) throws IOException {
this(new FileOutputStream(out), gzip);
}
/**
* Constructor with given FileOutputStream.
*
* @param out File output stream
* @throws IOException on IO error
*/
public SingleStreamOutput(FileOutputStream out) throws IOException {
this(out, false);
}
/**
* Constructor with given FileOutputStream.
*
* @param out File output stream
* @param gzip Use gzip compression
* @throws IOException on IO error
*/
public SingleStreamOutput(FileOutputStream out, boolean gzip) throws IOException {
OutputStream os = out;
if (gzip) {
// wrap into gzip stream.
os = new GZIPOutputStream(os);
}
this.stream = new PrintStream(os);
}
/**
* Return the objects shared print stream.
*
* @param filename ignored filename for SingleStreamOutput, as the name suggests
*/
@Override
public PrintStream openStream(String filename) {
return stream;
}
/**
* Close output stream.
*/
@Override
public void closeAllStreams() {
stream.close();
}
}
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