public MergingIterator(Comparator comparator, Iterator[] children)
{
comparator_ = comparator;
children_ = new IteratorWrapper[children.Length];
current_ = null;
direction_ = Direction.kForward;
for (int i = 0; i < children.Length; i++)
children_[i] = new IteratorWrapper(children[i]);
}
public Iterator NewIterator(Comparator comparator)
{
if (size_ < 2 * sizeof(UInt32))
{
return Iterator.NewErrorIterator(Status.Corruption("bad block contents"));
}
UInt32 num_restarts = NumRestarts();
if (num_restarts == 0)
{
return Iterator.EmptyIterator;
}
else
{
return new Iter(comparator, data_, restart_offset_, num_restarts);
}
}
public Iter(Comparator comparator,
ByteArrayPointer data,
UInt32 restarts,
UInt32 num_restarts)
{
comparator_ = comparator;
data_ = data;
restarts_ = restarts;
num_restarts_ = num_restarts;
current_ = restarts_;
restart_index_ = num_restarts_;
Debug.Assert(num_restarts_ > 0);
}
internal static Iterator NewMergingIterator(Comparator comparator, Iterator[] children)
{
Debug.Assert(children.Length >= 0);
if (children.Length == 0)
{
return EmptyIterator;
}
else if (children.Length == 1)
{
return children[0];
}
else
{
return new MergingIterator(comparator, children);
}
}
public InternalKeyComparator(Comparator c)
{
m_userComparator = c;
}