/*
* Copyright 2009 Keith Stevens
*
* This file is part of the S-Space package and is covered under the terms and
* conditions therein.
*
* The S-Space package is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation and distributed hereunder to you.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND NO REPRESENTATIONS OR WARRANTIES,
* EXPRESS OR IMPLIED ARE MADE. BY WAY OF EXAMPLE, BUT NOT LIMITATION, WE MAKE
* NO REPRESENTATIONS OR WARRANTIES OF MERCHANT- ABILITY OR FITNESS FOR ANY
* PARTICULAR PURPOSE OR THAT THE USE OF THE LICENSED SOFTWARE OR DOCUMENTATION
* WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER
* RIGHTS.
*
* 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 edu.ucla.sspace.matrix;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOError;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A {@link FileTransformer} for matrix files in the {@link
* Format#MATLAB_SPARSE} format.
*
* @author Keith Stevens
*/
public class MatlabSparseFileTransformer implements FileTransformer {
/**
* {@inheritDoc}
*/
public File transform(File inputFile,
File outputFile,
GlobalTransform transform) {
try {
BufferedReader br = new BufferedReader(new FileReader(inputFile));
PrintWriter writer = new PrintWriter(new BufferedWriter(
new FileWriter(outputFile)));
for (String line = null; (line = br.readLine()) != null; ) {
String[] rowColEntry = line.split("\\s+");
int row = Integer.parseInt(rowColEntry[0]);
int col = Integer.parseInt(rowColEntry[1]);
double value = Double.parseDouble(rowColEntry[2]);
writer.printf("%d %d %f\n", row, col,
transform.transform(row-1, col-1, value));
}
writer.close();
return outputFile;
} catch (IOException ioe) {
throw new IOError(ioe);
}
}
}