#!/usr/bin/env python
# -*- encoding: utf-8 -*-

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#  to you under the Apache License, Version 2.0 (the
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#
#    http://www.apache.org/licenses/LICENSE-2.0
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'''identity bolt'''

from heronpy.api.bolt.bolt import Bolt

class IdentityBolt(Bolt):
  """Identity Bolt

  Output fields are not declared within this class, so they need to be
  provided from ``optional_outputs`` parameter in ``spec()``.
  """
  # output fields need to be set by topology
  def process(self, tup):
    self.emit(tup.values)