/**
 * Copyright (C) 2013 Meta
 * Date: 30/01/2013
 */

package util;

import java.util.ArrayList;

public class ArraySet<E> extends ArrayList<E>
{// no duplicates, no null
	private static final long serialVersionUID = 1L;

	public ArraySet()
	{
		super();
	}
	
	@Override
	public boolean add(E object)
	{
		if(!contains(object) && object != null)
		{
			return super.add(object);
		}
		return false;
	}
	
	@Override
	public void add(int index, E object)
	{
		if(!contains(object))
		{
			super.add(index, object);
		}
	}
	
	@Override
	public E set(int index, E object)
	{
		if(!contains(object))
		{
			return super.set(index, object);
		}
		return null;
	}
}