/** @param level -1 to get items */
private void boundablesAtLevel(int level, AbstractNode top, Collection boundables) {
Assert.isTrue(level > -2);
if (top.getLevel() == level) {
boundables.add(top);
return;
}
for (Iterator i = top.getChildBoundables().iterator(); i.hasNext(); ) {
Boundable boundable = (Boundable) i.next();
if (boundable instanceof AbstractNode) {
boundablesAtLevel(level, (AbstractNode) boundable, boundables);
} else {
Assert.isTrue(boundable instanceof ItemBoundable);
if (level == -1) {
boundables.add(boundable);
}
}
}
return;
}
