package dk.itu.oop.lecture5;

import java.util.Comparator;

public class CompareMerge extends MergeIterators{
	
	public CompareMerge(OOPIterator itr1, OOPIterator itr2){
		super(itr1,itr2);
	}
	
	/*pre: i1 and i2 both have elements left
	 *post: return either i1 or i2, but not the same twice in a row.
	 */
	protected OOPIterator choose(OOPIterator i1, OOPIterator i2){
		Comparable e1 = (Comparable) i1.peek();
		Comparable e2 = (Comparable) i2.peek();
		if ( e1.compareTo(e2)<0 )
			return i1;
		else
			return i2;
	}
}