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//******************************************************************************
//
// File: FloydPrint.java
// Package: edu.rit.smp.network
// Unit: Class edu.rit.smp.network.FloydPrint
//
// This Java source file is copyright (C) 2008 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This Java source file is part of the Parallel Java Library ("PJ"). PJ 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.
//
// PJ 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.
//
// Linking this library statically or dynamically with other modules is making a
// combined work based on this library. Thus, the terms and conditions of the
// GNU General Public License cover the whole combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent modules, and
// to copy and distribute the resulting executable under terms of your choice,
// provided that you also meet, for each linked independent module, the terms
// and conditions of the license of that module. An independent module is a
// module which is not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the library, but
// you are not obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************
package edu.rit.smp.network;
import edu.rit.io.DoubleMatrixFile;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.text.DecimalFormat;
/**
* Class FloydPrint is a main program that prints the contents of a distance
* matrix input or output file for the {@linkplain FloydSeq}, {@linkplain
* FloydSmpRow}, and {@linkplain FloydSmpCol} programs.
* <P>
* Usage: java edu.rit.smp.network.FloydPrint <I>matrixfile</I>
* <P>
* The distance matrix file is a binary file written in the format required by
* class {@linkplain edu.rit.io.DoubleMatrixFile}.
*
* @author Alan Kaminsky
* @version 09-Jan-2008
*/
public class FloydPrint
{
// Hidden constants.
private static final DecimalFormat FMT3 = new DecimalFormat ("0.000");
// Prevent construction.
private FloydPrint()
{
}
// Main program.
/**
* Main program.
*/
public static void main
(String[] args)
throws Exception
{
// Parse command line arguments.
if (args.length != 1) usage();
String matrixfile = args[0];
// Read distance matrix file.
DoubleMatrixFile dmf = new DoubleMatrixFile();
DoubleMatrixFile.Reader reader =
dmf.prepareToRead
(new BufferedInputStream
(new FileInputStream (matrixfile)));
reader.read();
reader.close();
// Print distance matrix elements.
int n = dmf.getRowCount();
double[][] d = dmf.getMatrix();
for (int r = 0; r < n; ++ r)
{
double[] d_r = d[r];
for (int c = 0; c < n; ++ c)
{
StringBuilder buf = new StringBuilder (6);
buf.append (FMT3.format (d_r[c]));
while (buf.length() < 6) buf.append (' ');
System.out.print (buf);
}
System.out.println();
}
}
// Hidden operations.
/**
* Print a usage message and exit.
*/
private static void usage()
{
System.err.println ("Usage: java edu.rit.smp.network.FloydPrint <matrixfile>");
System.err.println ("<matrixfile> = Distance matrix file");
System.exit (1);
}
}
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