package CSV;

import java.util.*;
import java.io.*;

public class CSV {

	public List header = new LinkedList() ;
	public LinkedList<List> rows = new LinkedList<List>()  ;
	
	public void addHeaderItem(Object h) {
		header.add(h) ;
	}
	
	public void addItem(Object i) {
		if (rows.isEmpty()) {
			rows.add(new LinkedList()) ;
		}
		rows.getLast().add(i) ;
	}
	
	public void startNewRow() {
		rows.add(new LinkedList()) ;
	}
	
	private void printRow(PrintStream outfile, List row){
		if (row != null && ! row.isEmpty()) {
			Iterator iter = row.iterator() ;
			outfile.print(iter.next().toString()) ;
			while (iter.hasNext()) {
				outfile.print(", " + iter.next()) ; 
			}
			outfile.println("") ;
		}
	}
	
	public void save(String fname) {
		PrintStream outfile = null;
		try {
		       outfile = new PrintStream(new FileOutputStream(fname));
		   } 
		catch (IOException e)
		   {
		      throw new Error(e) ;
		   }
		printRow(outfile,header) ;
		for (List row : rows) printRow(outfile,row) ;
		outfile.close() ;	
	}
	
	
}