code: ///////////////////////////////////////////////////////////////////////////////
  // For information as to what this class does, see the Javadoc, below.       //
  // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
  // 2007, 2008, 2009, 2010, 2014, 2015 by Peter Spirtes, Richard Scheines, Joseph   //
  // Ramsey, and Clark Glymour.                                                //
  //                                                                           //
  // This program 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 2 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 General Public License for more details.                              //
  //                                                                           //
  // You should have received a copy of the GNU General Public License         //
  // along with this program; if not, write to the Free Software               //
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA //
  ///////////////////////////////////////////////////////////////////////////////
  
  package edu.pitt.isp.sverchkov.data;
  
  import java.io.*;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Scanner;
  
  /**
   *
   * @author YUS24
   */
  public class DataTools {
      
      public final static String NEWLINE = System.getProperty("line.separator");
      public final static String DELIMITER_REGEX = " *, *";
      public final static String DELIMITER = ", ";
              
      public static DataTable<String,String> dataTableFromFile( File file ) throws FileNotFoundException{
          DataTable<String,String> data = null;
          try ( Scanner in = new Scanner( file ) ){
              data = new DataTableImpl<>( Arrays.asList( in.nextLine().trim().split(DELIMITER_REGEX) ) );
              while( in.hasNextLine() )
                  data.addRow( Arrays.asList( in.nextLine().trim().split(DELIMITER_REGEX) ) );
          }
          return data;
      }
      
      public static <Attribute,Value> void saveCSV( DataTable<Attribute,Value> data, File dest, boolean headers ) throws IOException{
          try( BufferedWriter out = new BufferedWriter( new FileWriter( dest ) ) ){
              
              if( headers ){
                  String delim = "";
                  for( Attribute a : data.variables() ){
                      out.append(delim).append( a.toString() );
                      delim = DELIMITER;
                  }
                  out.append(NEWLINE);
              }
              
              for( List<Value> row : data ){
                  String delim = "";
                  for( Value v : row ){
                      out.append(delim).append( v.toString() );
                      delim = DELIMITER;
                  }
                  out.append(NEWLINE);
              }
          }
      }
  }
  
  