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package ca.pfv.spmf.algorithms.sequentialpatterns.prefixSpan_AGP.savers;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import ca.pfv.spmf.algorithms.sequentialpatterns.prefixSpan_AGP.items.patterns.Pattern;
/**
* This is an implementation of a class implementing the Saver interface. By
* means of these lines, the user choose to keep his patterns in a file whose
* path is given to this class.
*
* Copyright Antonio Gomariz PeƱalver 2013
*
* This file is part of the SPMF DATA MINING SOFTWARE
* (http://www.philippe-fournier-viger.com/spmf).
*
* SPMF 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.
*
* SPMF 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
* SPMF. If not, see <http://www.gnu.org/licenses/>.
*
* @author agomariz
*/
public class SaverIntoFile implements Saver {
private BufferedWriter writer = null;
private String path = null;
/**
* if true, sequences ids will be output for each pattern
*/
boolean outputSequenceIdentifiers;
/**
* Constructor
* @param outputFilePath file path for output file
* @param outputSequenceIdentifiers if true, sequences ids will be output for each pattern
*/
public SaverIntoFile(String outputFilePath, boolean outputSequenceIdentifiers) throws IOException {
path = outputFilePath;
writer = new BufferedWriter(new FileWriter(outputFilePath));
this.outputSequenceIdentifiers = outputSequenceIdentifiers;
}
@Override
public void savePattern(Pattern p) {
if (writer != null) {
// create a StringBuilder
StringBuilder r = new StringBuilder("");
// for each itemset in this sequential pattern
r.append(p.toStringToFile(outputSequenceIdentifiers));
try {
// write the string to the file
writer.write(r.toString());
// start a new line
writer.newLine();
} catch (IOException ex) {
Logger.getLogger(SaverIntoFile.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
@Override
public void finish() {
if (writer != null) {
try {
writer.close();
} catch (IOException ex) {
Logger.getLogger(SaverIntoFile.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
@Override
public void clear() {
writer = null;
}
@Override
public String print() {
return "Content at file " + path;
}
}