package Reader;

import java.util.NoSuchElementException;


public class Tokenizer {

	private static final String DELIMITER = ",";

	private int currentPosition;

	private int nextPosition;

	private String s;


	public Tokenizer(String s) {
		this.s = s;
		this.currentPosition = 0;
		this.nextPosition = s.indexOf(DELIMITER, currentPosition);
	}


	public boolean hasNext() {
		return nextPosition != -1 && currentPosition <= nextPosition;
	}


	public String next() throws NoSuchElementException {
		if (!hasNext())
			throw new NoSuchElementException();

		String next = s.substring(currentPosition, nextPosition);

		currentPosition = nextPosition + 1;
		nextPosition = s.indexOf(DELIMITER, currentPosition);

		return next;
	}
}