/** Creates a random iterator for the prioritized table. */
public RandomIterator() {
outIter = levels.values().iterator();
if (outIter.hasNext()) {
currentLevel = outIter.next();
order = RandomPermutation.nextPermutation(currentLevel.size());
}
}
/**
* Returns the next object of the prioritized map. This method may be called repeatedly to
* iterate through the prioritized map.
*
* @return The next object of the prioritized map.
*/
public E next() {
// Next object of the current level
E obj = currentLevel.get(order[current++]);
// The level has been finished
if (current == order.length) {
if (outIter.hasNext()) {
currentLevel = outIter.next();
order = RandomPermutation.nextPermutation(currentLevel.size());
current = 0;
} else currentLevel = null;
}
return obj;
}
