/**
 * --Copyright notice-- 
 *
 * Copyright (c) School of Geography, University of Leeds. 
 * http://www.geog.leeds.ac.uk/
 * This software is licensed under 'The Artistic License' which can be found at 
 * the Open Source Initiative website at... 
 * http://www.opensource.org/licenses/artistic-license.php
 * Please note that the optional Clause 8 does not apply to this code.
 *
 * The Standard Version source code, and associated documentation can be found at... 
 * [online] http://mass.leeds.ac.uk/
 * 
 *
 * --End of Copyright notice-- 
 *
 */
 
 import java.io.*;
 import java.util.*;
 import java.awt.*;
 
 
/**
* Reads and writes file data.
* @version 1.0
* @author <A href="http://www.geog.leeds.ac.uk/people/a.evans/">Andy Evans</A>
*/
 public class IO {

 
	/**
	* Reads an array of doubles from a text file.
	* File delimiters are commas and spaces.
	* @param f text file to read
	* @return data read in
	*/
	public double[][] readData(File f) {

		
		// Count lines
		
		FileReader fr = null;

		try {

				fr = new FileReader (f);

		} catch (FileNotFoundException fnfe) {
				fnfe.printStackTrace();
		}

		
		BufferedReader br = new BufferedReader(fr);

		int lines = -1;
		String textIn = " ";
		String[] file = null;

		try {
			while (textIn != null) {
				textIn = br.readLine();
				lines++;
			}

			file = new String[lines];

			br.close();
			try {

				fr = new FileReader (f);

			} catch (FileNotFoundException fnfe) {
					fnfe.printStackTrace();
			}
			
			// Read lines.
			
			br = new BufferedReader(fr);

			for (int i = 0; i < lines; i++) {
				file[i] = br.readLine();
			}
			
			br.close();
			
		} catch (IOException ioe) {}

		// Convert lines to doubles.
		
		double[][] data = new double [lines][];

		for (int i = 0; i < lines; i++) {

			StringTokenizer st = new StringTokenizer(file[i],", ");
			data[i] = new double[st.countTokens()];
			int j = 0;
			while (st.hasMoreTokens()) { 		
				data[i][j] = Double.parseDouble(st.nextToken()); 
				j++;
			}
		} 

		return data;
   }

   
   
   
   	/**
	* Write an array of doubles to a text file.
	* Data delimiter is commas and space.
	* @param dataIn data to write
	* @param f text file to write
	*/
   public void writeData(double[][] dataIn, File f) {
   
		
		FileWriter fw = null;

		try {

				fw = new FileWriter (f, false);

		} catch (IOException ioe) {
				ioe.printStackTrace();
		}

		BufferedWriter bw = new BufferedWriter (fw);
				
		String tempStr = "";

		try {
			for (int i = 0; i < dataIn.length; i++) {
				for (int j = 0; j < dataIn[i].length; j++) {

					tempStr = String.valueOf(dataIn[i][j]); 
					bw.write(tempStr + ", ");

				}
				bw.newLine();	
			}
			bw.close();

		} catch (IOException ioe) {}


   }

}