serialize.py 3.2 KB

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  1. # Copyright 2012-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  2. #
  3. # Modifications made by Cloudera are:
  4. # Copyright (c) 2016 Cloudera, Inc. All rights reserved.
  5. #
  6. # Licensed under the Apache License, Version 2.0 (the "License"). You
  7. # may not use this file except in compliance with the License. A copy of
  8. # the License is located at
  9. #
  10. # http://aws.amazon.com/apache2.0/
  11. #
  12. # or in the "license" file accompanying this file. This file is
  13. # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
  14. # ANY KIND, either express or implied. See the License for the specific
  15. # language governing permissions and limitations under the License.
  16. from collections import OrderedDict
  17. import json
  18. class Serializer(object):
  19. DEFAULT_ENCODING = 'utf-8'
  20. def serialize_to_request(self, parameters, operation_model):
  21. # Don't serialize any parameter with a None value.
  22. filtered_parameters = OrderedDict(
  23. (k, v) for k, v in parameters.items() if v is not None)
  24. serialized = {}
  25. # serialized['method'] = operation_model.http['method']
  26. # serialized['headers'] = {'Content-Type': 'application/json'}
  27. # serialized['url_path'] = operation_model.http['requestUri']
  28. serialized_body = OrderedDict()
  29. if len(filtered_parameters) != 0:
  30. self._serialize(serialized_body, filtered_parameters, None)
  31. serialized['body'] = json.dumps(serialized_body).encode(self.DEFAULT_ENCODING)
  32. return serialized
  33. def _serialize(self, serialized, value, shape, key=None):
  34. # serialize_method_name = '_serialize_type_%s' % shape.type_name
  35. # method = getattr(self, serialize_method_name, self._default_serialize)
  36. self._default_serialize(serialized, value, shape, key)
  37. def _serialize_type_object(self, serialized, value, shape, key):
  38. if key is not None:
  39. # If a key is provided, this is a result of a recursive call, so we
  40. # need to add a new child dict as the value of the passed in dict.
  41. # Below we will add all the structure members to the new serialized
  42. # dictionary we just created.
  43. serialized[key] = OrderedDict()
  44. serialized = serialized[key]
  45. for member_key, member_value in value.items():
  46. member_shape = shape.members[member_key]
  47. self._serialize(serialized, member_value, member_shape, member_key)
  48. def _serialize_type_array(self, serialized, value, shape, key):
  49. array_obj = []
  50. serialized[key] = array_obj
  51. for array_item in value:
  52. wrapper = {}
  53. # JSON list serialization is the only case where we aren't setting
  54. # a key on a dict. We handle this by using a __current__ key on a
  55. # wrapper dict to serialize each list item before appending it to
  56. # the serialized list.
  57. self._serialize(wrapper, array_item, shape.member, "__current__")
  58. array_obj.append(wrapper["__current__"])
  59. def _default_serialize(self, serialized, value, shape, key):
  60. if key:
  61. serialized[key] = value
  62. else:
  63. for member_key, member_value in value.items():
  64. serialized[member_key] = member_value