ceph/src/jaegertracing/thrift/lib/py/src/TRecursive.py

   1 # Licensed under the Apache License, Version 2.0 (the "License");
   2 # you may not use this file except in compliance with the License.
   3 # You may obtain a copy of the License at
   4 #
   5 #   http://www.apache.org/licenses/LICENSE-2.0
   6 #
   7 # Unless required by applicable law or agreed to in writing, software
   8 # distributed under the License is distributed on an "AS IS" BASIS,
   9 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  10 # See the License for the specific language governing permissions and
  11 # limitations under the License.
  12
  13 from __future__ import absolute_import
  14 from __future__ import division
  15 from __future__ import print_function
  16 from __future__ import unicode_literals
  17
  18 from thrift.Thrift import TType
  19
  20 TYPE_IDX = 1
  21 SPEC_ARGS_IDX = 3
  22 SPEC_ARGS_CLASS_REF_IDX = 0
  23 SPEC_ARGS_THRIFT_SPEC_IDX = 1
  24
  25
  26 def fix_spec(all_structs):
  27     """Wire up recursive references for all TStruct definitions inside of each thrift_spec."""
  28     for struc in all_structs:
  29         spec = struc.thrift_spec
  30         for thrift_spec in spec:
  31             if thrift_spec is None:
  32                 continue
  33             elif thrift_spec[TYPE_IDX] == TType.STRUCT:
  34                 other = thrift_spec[SPEC_ARGS_IDX][SPEC_ARGS_CLASS_REF_IDX].thrift_spec
  35                 thrift_spec[SPEC_ARGS_IDX][SPEC_ARGS_THRIFT_SPEC_IDX] = other
  36             elif thrift_spec[TYPE_IDX] in (TType.LIST, TType.SET):
  37                 _fix_list_or_set(thrift_spec[SPEC_ARGS_IDX])
  38             elif thrift_spec[TYPE_IDX] == TType.MAP:
  39                 _fix_map(thrift_spec[SPEC_ARGS_IDX])
  40
  41
  42 def _fix_list_or_set(element_type):
  43     # For a list or set, the thrift_spec entry looks like,
  44     # (1, TType.LIST, 'lister', (TType.STRUCT, [RecList, None], False), None, ),  # 1
  45     # so ``element_type`` will be,
  46     # (TType.STRUCT, [RecList, None], False)
  47     if element_type[0] == TType.STRUCT:
  48         element_type[1][1] = element_type[1][0].thrift_spec
  49     elif element_type[0] in (TType.LIST, TType.SET):
  50         _fix_list_or_set(element_type[1])
  51     elif element_type[0] == TType.MAP:
  52         _fix_map(element_type[1])
  53
  54
  55 def _fix_map(element_type):
  56     # For a map of key -> value type, ``element_type`` will be,
  57     # (TType.I16, None, TType.STRUCT, [RecMapBasic, None], False), None, )
  58     # which is just a normal struct definition.
  59     #
  60     # For a map of key -> list / set, ``element_type`` will be,
  61     # (TType.I16, None, TType.LIST, (TType.STRUCT, [RecMapList, None], False), False)
  62     # and we need to process the 3rd element as a list.
  63     #
  64     # For a map of key -> map, ``element_type`` will be,
  65     # (TType.I16, None, TType.MAP, (TType.I16, None, TType.STRUCT,
  66     #  [RecMapMap, None], False), False)
  67     # and need to process 3rd element as a map.
  68
  69     # Is the map key a struct?
  70     if element_type[0] == TType.STRUCT:
  71         element_type[1][1] = element_type[1][0].thrift_spec
  72     elif element_type[0] in (TType.LIST, TType.SET):
  73         _fix_list_or_set(element_type[1])
  74     elif element_type[0] == TType.MAP:
  75         _fix_map(element_type[1])
  76
  77     # Is the map value a struct?
  78     if element_type[2] == TType.STRUCT:
  79         element_type[3][1] = element_type[3][0].thrift_spec
  80     elif element_type[2] in (TType.LIST, TType.SET):
  81         _fix_list_or_set(element_type[3])
  82     elif element_type[2] == TType.MAP:
  83         _fix_map(element_type[3])