@Override
public synchronized Integer next() {
if (hasNext()) {
return mTour.getNodeAt(mPosition++);
} else {
throw new NoSuchElementException();
}
}
@Override
public synchronized Integer previous() {
if (hasPrevious()) {
return mTour.getNodeAt(--mPosition);
} else {
throw new NoSuchElementException();
}
}
@Override
public synchronized boolean hasNext() {
return mPosition < mTour.length();
}
