Source code for apache_beam.portability.common_urns

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# Licensed to the Apache Software Foundation (ASF) under one or more
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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
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#    http://www.apache.org/licenses/LICENSE-2.0
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""" Accessors for URNs of common Beam entities. """

from apache_beam.portability.api import beam_runner_api_pb2
from apache_beam.portability.api import standard_window_fns_pb2


class PropertiesFromEnumValue(object):
  def __init__(self, value_descriptor):
    self.urn = (
        value_descriptor.GetOptions().Extensions[beam_runner_api_pb2.beam_urn])


class PropertiesFromEnumType(object):
  def __init__(self, enum_type):
    for v in enum_type.DESCRIPTOR.values:
      setattr(self, v.name, PropertiesFromEnumValue(v))


primitives = PropertiesFromEnumType(
    beam_runner_api_pb2.StandardPTransforms.Primitives)
deprecated_primitives = PropertiesFromEnumType(
    beam_runner_api_pb2.StandardPTransforms.DeprecatedPrimitives)
composites = PropertiesFromEnumType(
    beam_runner_api_pb2.StandardPTransforms.Composites)
combine_components = PropertiesFromEnumType(
    beam_runner_api_pb2.StandardPTransforms.CombineComponents)

side_inputs = PropertiesFromEnumType(
    beam_runner_api_pb2.StandardSideInputTypes.Enum)

coders = PropertiesFromEnumType(beam_runner_api_pb2.StandardCoders.Enum)


def PropertiesFromPayloadType(payload_type):
  return PropertiesFromEnumType(payload_type.Enum).PROPERTIES


global_windows = PropertiesFromPayloadType(
    standard_window_fns_pb2.GlobalWindowsPayload)
fixed_windows = PropertiesFromPayloadType(
    standard_window_fns_pb2.FixedWindowsPayload)
sliding_windows = PropertiesFromPayloadType(
    standard_window_fns_pb2.SlidingWindowsPayload)
session_windows = PropertiesFromPayloadType(
    standard_window_fns_pb2.SessionsPayload)