GroupingIterable.java 文件源码

@Override
public Iterator<List<T>> iterator() {
  final PeekingIterator<T> iter = Iterators.peekingIterator(delegate.iterator());
  return new AbstractIterator<List<T>>() {
    @Override
    protected List<T> computeNext() {
      if (!iter.hasNext()) {
        return endOfData();
      }
      ArrayList<T> result = Lists.newArrayList();
      T last = iter.next();
      result.add(last);
      while (iter.hasNext() && equiv.equivalent(last, iter.peek())) {
        last = iter.next(); // get peeked value
        result.add(last);
      }
      return result;
    }
  };
}