package F28DA_CW1;

import java.util.Iterator;
import java.util.LinkedList;

public class LListWords implements IWords {

	private LinkedList<String> llist;

	public LListWords() {
		llist = new LinkedList<String>();
	}

	public void addWord(String word) throws WException {

		if (wordExists(word) == false) {
			llist.add(word);
		} else {
			throw new WException("Word already present.");
		}
	}

	public void delWord(String word) throws WException {

		if(wordExists(word)==true) {
			llist.remove(word);
		}else {
			throw new WException("Word not present.");
		}

	}

	public boolean wordExists(String word) {

		if (llist.contains(word) == true) {
			return true;
		} else {

			return false;
		}
	}

	public int nbWords() {
		return llist.size();

	}

	public Iterator<String> allWords() {
		   return llist.iterator();

	}



}