import java.util.Iterator;
import java.lang.UnsupportedOperationException;
import java.util.NoSuchElementException;

public class SledDogIterator<T> implements Iterator<T> {
	private LinearNode<T> leadNode;
	
	public SledDogIterator ()
	{
		leadNode = null;
	}
	
	public SledDogIterator (LinearNode<T> lNode)
	{
		leadNode = lNode;
	}
	
	public boolean hasNext ()
	{
		return (leadNode == null ? false : true);
	}
	
	public T next ()
	{
		if (leadNode != null)
		{
			T ret = leadNode.getElement();
			leadNode = leadNode.getNext();
			return ret;
		}
		else
		{
			throw new NoSuchElementException ("No such element present in the Iterator");
		}
	}
	
	public void remove ()
	{
		throw new UnsupportedOperationException("Remove operation is not supported");
	}

}