def add_message_fields(
root: ProtoNode,
message: ProtoNode,
proto_message,
) -> None:
"""Adds fields from a protobuf message descriptor to a message node."""
assert message.type() == ProtoNode.Type.MESSAGE
for field in proto_message.field:
if field.type_name:
# The "type_name" member contains the global .proto path of the
# field's type object, for example ".pw.protobuf.test.KeyValuePair".
# Since only a single proto file is currently supported, the root
# node has the value of the file's package ("pw.protobuf.test").
# This must be stripped from the path to find the desired node
# within the tree.
#
# TODO(frolv): Once multiple files are supported, the root node
# should refer to the global namespace, and this should no longer
# be needed.
path = field.type_name
if path[0] == '.':
path = path[1:]
if path.startswith(root.name()):
relative_path = path[len(root.name()):].lstrip('.')
else:
relative_path = path
type_node = root.find(relative_path)
else:
type_node = None
repeated = \
field.label == descriptor_pb2.FieldDescriptorProto.LABEL_REPEATED
message.add_field(
ProtoMessageField(
field.name,
field.number,
field.type,
type_node,
repeated,
))
def add_message_fields(global_root: ProtoNode, package_root: ProtoNode,
message: ProtoNode, proto_message) -> None:
"""Adds fields from a protobuf message descriptor to a message node."""
assert message.type() == ProtoNode.Type.MESSAGE
for field in proto_message.field:
if field.type_name:
# The "type_name" member contains the global .proto path of the
# field's type object, for example ".pw.protobuf.test.KeyValuePair".
# Try to find the node for this object within the current context.
if field.type_name[0] == '.':
# Fully qualified path.
root_relative_path = field.type_name[1:]
search_root = global_root
else:
root_relative_path = field.type_name
search_root = package_root
type_node = search_root.find(root_relative_path)
if type_node is None:
# Create nodes for field types that don't exist within this
# compilation context, such as those imported from other .proto
# files.
type_node = create_external_nodes(search_root,
root_relative_path)
else:
type_node = None
repeated = \
field.label == descriptor_pb2.FieldDescriptorProto.LABEL_REPEATED
message.add_field(
ProtoMessageField(
field.name,
field.number,
field.type,
type_node,
repeated,
))