function zipAll for iterables

gistfile1.java

public static <A, B> Iterable<Pair<A, B>> zipAll(Iterable<A> iter1, Iterable<B> iter2, A def1, B def2){
	List<Pair<A, B>> zipped = new ArrayList<TitleParser.Pair<A,B>>();
	Iterator<A> these = iter1.iterator();
	Iterator<B> those = iter2.iterator();
	while(these.hasNext() && those.hasNext()){
		zipped.add(new Pair<A, B>(these.next(), those.next()));
	}
	while(these.hasNext()){
		zipped.add(new Pair<A, B>(these.next(), def2));
	}
	while(those.hasNext()){
		zipped.add(new Pair<A, B>(def1, those.next()));
	}
	return zipped;
}

public static class Pair<A, B> {
	public final A left;
	public final B right;
	
	public Pair(A left, B right) {
		this.left = left;
		this.right = right;
	}

	@Override
	public String toString() {
		return "(" + left + ", " + right + ")";
	}
}