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Diffstat (limited to '.venv/lib/python3.12/site-packages/google/protobuf/internal/field_mask.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/google/protobuf/internal/field_mask.py | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/google/protobuf/internal/field_mask.py b/.venv/lib/python3.12/site-packages/google/protobuf/internal/field_mask.py new file mode 100644 index 00000000..ae34f08a --- /dev/null +++ b/.venv/lib/python3.12/site-packages/google/protobuf/internal/field_mask.py @@ -0,0 +1,310 @@ +# Protocol Buffers - Google's data interchange format +# Copyright 2008 Google Inc. All rights reserved. +# +# Use of this source code is governed by a BSD-style +# license that can be found in the LICENSE file or at +# https://developers.google.com/open-source/licenses/bsd + +"""Contains FieldMask class.""" + +from google.protobuf.descriptor import FieldDescriptor + + +class FieldMask(object): + """Class for FieldMask message type.""" + + __slots__ = () + + def ToJsonString(self): + """Converts FieldMask to string according to proto3 JSON spec.""" + camelcase_paths = [] + for path in self.paths: + camelcase_paths.append(_SnakeCaseToCamelCase(path)) + return ','.join(camelcase_paths) + + def FromJsonString(self, value): + """Converts string to FieldMask according to proto3 JSON spec.""" + if not isinstance(value, str): + raise ValueError('FieldMask JSON value not a string: {!r}'.format(value)) + self.Clear() + if value: + for path in value.split(','): + self.paths.append(_CamelCaseToSnakeCase(path)) + + def IsValidForDescriptor(self, message_descriptor): + """Checks whether the FieldMask is valid for Message Descriptor.""" + for path in self.paths: + if not _IsValidPath(message_descriptor, path): + return False + return True + + def AllFieldsFromDescriptor(self, message_descriptor): + """Gets all direct fields of Message Descriptor to FieldMask.""" + self.Clear() + for field in message_descriptor.fields: + self.paths.append(field.name) + + def CanonicalFormFromMask(self, mask): + """Converts a FieldMask to the canonical form. + + Removes paths that are covered by another path. For example, + "foo.bar" is covered by "foo" and will be removed if "foo" + is also in the FieldMask. Then sorts all paths in alphabetical order. + + Args: + mask: The original FieldMask to be converted. + """ + tree = _FieldMaskTree(mask) + tree.ToFieldMask(self) + + def Union(self, mask1, mask2): + """Merges mask1 and mask2 into this FieldMask.""" + _CheckFieldMaskMessage(mask1) + _CheckFieldMaskMessage(mask2) + tree = _FieldMaskTree(mask1) + tree.MergeFromFieldMask(mask2) + tree.ToFieldMask(self) + + def Intersect(self, mask1, mask2): + """Intersects mask1 and mask2 into this FieldMask.""" + _CheckFieldMaskMessage(mask1) + _CheckFieldMaskMessage(mask2) + tree = _FieldMaskTree(mask1) + intersection = _FieldMaskTree() + for path in mask2.paths: + tree.IntersectPath(path, intersection) + intersection.ToFieldMask(self) + + def MergeMessage( + self, source, destination, + replace_message_field=False, replace_repeated_field=False): + """Merges fields specified in FieldMask from source to destination. + + Args: + source: Source message. + destination: The destination message to be merged into. + replace_message_field: Replace message field if True. Merge message + field if False. + replace_repeated_field: Replace repeated field if True. Append + elements of repeated field if False. + """ + tree = _FieldMaskTree(self) + tree.MergeMessage( + source, destination, replace_message_field, replace_repeated_field) + + +def _IsValidPath(message_descriptor, path): + """Checks whether the path is valid for Message Descriptor.""" + parts = path.split('.') + last = parts.pop() + for name in parts: + field = message_descriptor.fields_by_name.get(name) + if (field is None or + field.label == FieldDescriptor.LABEL_REPEATED or + field.type != FieldDescriptor.TYPE_MESSAGE): + return False + message_descriptor = field.message_type + return last in message_descriptor.fields_by_name + + +def _CheckFieldMaskMessage(message): + """Raises ValueError if message is not a FieldMask.""" + message_descriptor = message.DESCRIPTOR + if (message_descriptor.name != 'FieldMask' or + message_descriptor.file.name != 'google/protobuf/field_mask.proto'): + raise ValueError('Message {0} is not a FieldMask.'.format( + message_descriptor.full_name)) + + +def _SnakeCaseToCamelCase(path_name): + """Converts a path name from snake_case to camelCase.""" + result = [] + after_underscore = False + for c in path_name: + if c.isupper(): + raise ValueError( + 'Fail to print FieldMask to Json string: Path name ' + '{0} must not contain uppercase letters.'.format(path_name)) + if after_underscore: + if c.islower(): + result.append(c.upper()) + after_underscore = False + else: + raise ValueError( + 'Fail to print FieldMask to Json string: The ' + 'character after a "_" must be a lowercase letter ' + 'in path name {0}.'.format(path_name)) + elif c == '_': + after_underscore = True + else: + result += c + + if after_underscore: + raise ValueError('Fail to print FieldMask to Json string: Trailing "_" ' + 'in path name {0}.'.format(path_name)) + return ''.join(result) + + +def _CamelCaseToSnakeCase(path_name): + """Converts a field name from camelCase to snake_case.""" + result = [] + for c in path_name: + if c == '_': + raise ValueError('Fail to parse FieldMask: Path name ' + '{0} must not contain "_"s.'.format(path_name)) + if c.isupper(): + result += '_' + result += c.lower() + else: + result += c + return ''.join(result) + + +class _FieldMaskTree(object): + """Represents a FieldMask in a tree structure. + + For example, given a FieldMask "foo.bar,foo.baz,bar.baz", + the FieldMaskTree will be: + [_root] -+- foo -+- bar + | | + | +- baz + | + +- bar --- baz + In the tree, each leaf node represents a field path. + """ + + __slots__ = ('_root',) + + def __init__(self, field_mask=None): + """Initializes the tree by FieldMask.""" + self._root = {} + if field_mask: + self.MergeFromFieldMask(field_mask) + + def MergeFromFieldMask(self, field_mask): + """Merges a FieldMask to the tree.""" + for path in field_mask.paths: + self.AddPath(path) + + def AddPath(self, path): + """Adds a field path into the tree. + + If the field path to add is a sub-path of an existing field path + in the tree (i.e., a leaf node), it means the tree already matches + the given path so nothing will be added to the tree. If the path + matches an existing non-leaf node in the tree, that non-leaf node + will be turned into a leaf node with all its children removed because + the path matches all the node's children. Otherwise, a new path will + be added. + + Args: + path: The field path to add. + """ + node = self._root + for name in path.split('.'): + if name not in node: + node[name] = {} + elif not node[name]: + # Pre-existing empty node implies we already have this entire tree. + return + node = node[name] + # Remove any sub-trees we might have had. + node.clear() + + def ToFieldMask(self, field_mask): + """Converts the tree to a FieldMask.""" + field_mask.Clear() + _AddFieldPaths(self._root, '', field_mask) + + def IntersectPath(self, path, intersection): + """Calculates the intersection part of a field path with this tree. + + Args: + path: The field path to calculates. + intersection: The out tree to record the intersection part. + """ + node = self._root + for name in path.split('.'): + if name not in node: + return + elif not node[name]: + intersection.AddPath(path) + return + node = node[name] + intersection.AddLeafNodes(path, node) + + def AddLeafNodes(self, prefix, node): + """Adds leaf nodes begin with prefix to this tree.""" + if not node: + self.AddPath(prefix) + for name in node: + child_path = prefix + '.' + name + self.AddLeafNodes(child_path, node[name]) + + def MergeMessage( + self, source, destination, + replace_message, replace_repeated): + """Merge all fields specified by this tree from source to destination.""" + _MergeMessage( + self._root, source, destination, replace_message, replace_repeated) + + +def _StrConvert(value): + """Converts value to str if it is not.""" + # This file is imported by c extension and some methods like ClearField + # requires string for the field name. py2/py3 has different text + # type and may use unicode. + if not isinstance(value, str): + return value.encode('utf-8') + return value + + +def _MergeMessage( + node, source, destination, replace_message, replace_repeated): + """Merge all fields specified by a sub-tree from source to destination.""" + source_descriptor = source.DESCRIPTOR + for name in node: + child = node[name] + field = source_descriptor.fields_by_name[name] + if field is None: + raise ValueError('Error: Can\'t find field {0} in message {1}.'.format( + name, source_descriptor.full_name)) + if child: + # Sub-paths are only allowed for singular message fields. + if (field.label == FieldDescriptor.LABEL_REPEATED or + field.cpp_type != FieldDescriptor.CPPTYPE_MESSAGE): + raise ValueError('Error: Field {0} in message {1} is not a singular ' + 'message field and cannot have sub-fields.'.format( + name, source_descriptor.full_name)) + if source.HasField(name): + _MergeMessage( + child, getattr(source, name), getattr(destination, name), + replace_message, replace_repeated) + continue + if field.label == FieldDescriptor.LABEL_REPEATED: + if replace_repeated: + destination.ClearField(_StrConvert(name)) + repeated_source = getattr(source, name) + repeated_destination = getattr(destination, name) + repeated_destination.MergeFrom(repeated_source) + else: + if field.cpp_type == FieldDescriptor.CPPTYPE_MESSAGE: + if replace_message: + destination.ClearField(_StrConvert(name)) + if source.HasField(name): + getattr(destination, name).MergeFrom(getattr(source, name)) + else: + setattr(destination, name, getattr(source, name)) + + +def _AddFieldPaths(node, prefix, field_mask): + """Adds the field paths descended from node to field_mask.""" + if not node and prefix: + field_mask.paths.append(prefix) + return + for name in sorted(node): + if prefix: + child_path = prefix + '.' + name + else: + child_path = name + _AddFieldPaths(node[name], child_path, field_mask) |