/* Copyright (c) 2007-2014 by panayotis.com
 *
 * JavaPlot is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 2.
 *
 * JavaPlot is free 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with CrossMobile; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Created on October 24, 2007, 2:00 AM
 */

package com.panayotis.gnuplot.dataset;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.StringTokenizer;

/**
 * This object uses data sets already stored in files.
 *
 * @author teras
 */
public class FileDataSet extends GenericDataSet {

    /**
     * Creates a new instance of a data set, stored in a file. When this object
     * is initialized, the file is read into memory.
     *
     * @param datafile The file containing the data set
     * @throws java.io.IOException when a I/O error is found
     * @throws java.lang.ArrayIndexOutOfBoundsException when the file has not
     * consistent number of columns
     * @throws java.lang.NumberFormatException when the numbers inside the file
     * are not parsable
     */
    public FileDataSet(File datafile) throws IOException, NumberFormatException, ArrayIndexOutOfBoundsException {
        super(true);

        BufferedReader in = new BufferedReader(new FileReader(datafile));
        String line;
        ArrayList<String> data;
        while ((line = in.readLine()) != null && (!line.equals(""))) {
            line = line.trim();
            if (!line.startsWith("#")) {
                data = new ArrayList<String>();
                StringTokenizer tk = new StringTokenizer(line);
                while (tk.hasMoreTokens())
                    data.add(tk.nextToken());
                add(data);
            }
        }
    }
}