Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/proto/marshal/collections/repeated.py: 32%
76 statements
« prev ^ index » next coverage.py v7.2.2, created at 2023-03-26 06:25 +0000
1# Copyright 2018 Google LLC
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7# https://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
15import collections
16import copy
18from proto.utils import cached_property
21class Repeated(collections.abc.MutableSequence):
22 """A view around a mutable sequence in protocol buffers.
24 This implements the full Python MutableSequence interface, but all methods
25 modify the underlying field container directly.
26 """
28 def __init__(self, sequence, *, marshal, proto_type=None):
29 """Initialize a wrapper around a protobuf repeated field.
31 Args:
32 sequence: A protocol buffers repeated field.
33 marshal (~.MarshalRegistry): An instantiated marshal, used to
34 convert values going to and from this map.
35 """
36 self._pb = sequence
37 self._marshal = marshal
38 self._proto_type = proto_type
40 def __copy__(self):
41 """Copy this object and return the copy."""
42 return type(self)(self.pb[:], marshal=self._marshal)
44 def __delitem__(self, key):
45 """Delete the given item."""
46 del self.pb[key]
48 def __eq__(self, other):
49 if hasattr(other, "pb"):
50 return tuple(self.pb) == tuple(other.pb)
51 return tuple(self.pb) == tuple(other)
53 def __getitem__(self, key):
54 """Return the given item."""
55 return self.pb[key]
57 def __len__(self):
58 """Return the length of the sequence."""
59 return len(self.pb)
61 def __ne__(self, other):
62 return not self == other
64 def __repr__(self):
65 return repr([*self])
67 def __setitem__(self, key, value):
68 self.pb[key] = value
70 def insert(self, index: int, value):
71 """Insert ``value`` in the sequence before ``index``."""
72 self.pb.insert(index, value)
74 def sort(self, *, key: str = None, reverse: bool = False):
75 """Stable sort *IN PLACE*."""
76 self.pb.sort(key=key, reverse=reverse)
78 @property
79 def pb(self):
80 return self._pb
83class RepeatedComposite(Repeated):
84 """A view around a mutable sequence of messages in protocol buffers.
86 This implements the full Python MutableSequence interface, but all methods
87 modify the underlying field container directly.
88 """
90 @cached_property
91 def _pb_type(self):
92 """Return the protocol buffer type for this sequence."""
93 # Provide the marshal-given proto_type, if any.
94 # Used for RepeatedComposite of Enum.
95 if self._proto_type is not None:
96 return self._proto_type
98 # There is no public-interface mechanism to determine the type
99 # of what should go in the list (and the C implementation seems to
100 # have no exposed mechanism at all).
101 #
102 # If the list has members, use the existing list members to
103 # determine the type.
104 if len(self.pb) > 0:
105 return type(self.pb[0])
107 # We have no members in the list, so we get the type from the attributes.
108 if hasattr(self.pb, "_message_descriptor") and hasattr(
109 self.pb._message_descriptor, "_concrete_class"
110 ):
111 return self.pb._message_descriptor._concrete_class
113 # Fallback logic in case attributes are not available
114 # In order to get the type, we create a throw-away copy and add a
115 # blank member to it.
116 canary = copy.deepcopy(self.pb).add()
117 return type(canary)
119 def __eq__(self, other):
120 if super().__eq__(other):
121 return True
122 return tuple([i for i in self]) == tuple(other)
124 def __getitem__(self, key):
125 return self._marshal.to_python(self._pb_type, self.pb[key])
127 def __setitem__(self, key, value):
128 # The underlying protocol buffer does not define __setitem__, so we
129 # have to implement all the operations on our own.
131 # If ``key`` is an integer, as in list[index] = value:
132 if isinstance(key, int):
133 if -len(self) <= key < len(self):
134 self.pop(key) # Delete the old item.
135 self.insert(key, value) # Insert the new item in its place.
136 else:
137 raise IndexError("list assignment index out of range")
139 # If ``key`` is a slice object, as in list[start:stop:step] = [values]:
140 elif isinstance(key, slice):
141 start, stop, step = key.indices(len(self))
143 if not isinstance(value, collections.abc.Iterable):
144 raise TypeError("can only assign an iterable")
146 if step == 1: # Is not an extended slice.
147 # Assign all the new values to the sliced part, replacing the
148 # old values, if any, and unconditionally inserting those
149 # values whose indices already exceed the slice length.
150 for index, item in enumerate(value):
151 if start + index < stop:
152 self.pop(start + index)
153 self.insert(start + index, item)
155 # If there are less values than the length of the slice, remove
156 # the remaining elements so that the slice adapts to the
157 # newly provided values.
158 for _ in range(stop - start - len(value)):
159 self.pop(start + len(value))
161 else: # Is an extended slice.
162 indices = range(start, stop, step)
164 if len(value) != len(indices): # XXX: Use PEP 572 on 3.8+
165 raise ValueError(
166 f"attempt to assign sequence of size "
167 f"{len(value)} to extended slice of size "
168 f"{len(indices)}"
169 )
171 # Assign each value to its index, calling this function again
172 # with individual integer indexes that get processed above.
173 for index, item in zip(indices, value):
174 self[index] = item
176 else:
177 raise TypeError(
178 f"list indices must be integers or slices, not {type(key).__name__}"
179 )
181 def insert(self, index: int, value):
182 """Insert ``value`` in the sequence before ``index``."""
183 pb_value = self._marshal.to_proto(self._pb_type, value)
184 self.pb.insert(index, pb_value)