Reads all hunt objects from the database.

def ReadHuntObjects(self,
                      offset,
                      count,
                      with_creator=None,
                      created_after=None,
                      with_description_match=None):
    """Reads all hunt objects from the database."""
    filter_fns = []
    if with_creator is not None:
      filter_fns.append(lambda h: h.creator == with_creator)
    if created_after is not None:
      filter_fns.append(lambda h: h.create_time > created_after)
    if with_description_match is not None:
      filter_fns.append(lambda h: with_description_match in h.description)
    filter_fn = lambda h: all(f(h) for f in filter_fns)

    result = [self._DeepCopy(h) for h in self.hunts.values() if filter_fn(h)]
    return sorted(
        result, key=lambda h: h.create_time,
        reverse=True)[offset:offset + (count or db.MAX_COUNT)]