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| """Contains the Nextgen Pythonic Protobuf JSON APIs.""" |
|
|
| from typing import Optional, Type |
|
|
| from google.protobuf.message import Message |
| from google.protobuf.descriptor_pool import DescriptorPool |
| from google.protobuf import json_format |
|
|
| def serialize( |
| message: Message, |
| always_print_fields_with_no_presence: bool=False, |
| preserving_proto_field_name: bool=False, |
| use_integers_for_enums: bool=False, |
| descriptor_pool: Optional[DescriptorPool]=None, |
| float_precision: int=None, |
| ) -> dict: |
| """Converts protobuf message to a dictionary. |
| |
| When the dictionary is encoded to JSON, it conforms to proto3 JSON spec. |
| |
| Args: |
| message: The protocol buffers message instance to serialize. |
| always_print_fields_with_no_presence: If True, fields without |
| presence (implicit presence scalars, repeated fields, and map fields) will |
| always be serialized. Any field that supports presence is not affected by |
| this option (including singular message fields and oneof fields). |
| preserving_proto_field_name: If True, use the original proto field names as |
| defined in the .proto file. If False, convert the field names to |
| lowerCamelCase. |
| use_integers_for_enums: If true, print integers instead of enum names. |
| descriptor_pool: A Descriptor Pool for resolving types. If None use the |
| default. |
| float_precision: If set, use this to specify float field valid digits. |
| |
| Returns: |
| A dict representation of the protocol buffer message. |
| """ |
| return json_format.MessageToDict( |
| message, |
| always_print_fields_with_no_presence=always_print_fields_with_no_presence, |
| preserving_proto_field_name=preserving_proto_field_name, |
| use_integers_for_enums=use_integers_for_enums, |
| float_precision=float_precision, |
| ) |
|
|
| def parse( |
| message_class: Type[Message], |
| js_dict: dict, |
| ignore_unknown_fields: bool=False, |
| descriptor_pool: Optional[DescriptorPool]=None, |
| max_recursion_depth: int=100 |
| ) -> Message: |
| """Parses a JSON dictionary representation into a message. |
| |
| Args: |
| message_class: The message meta class. |
| js_dict: Dict representation of a JSON message. |
| ignore_unknown_fields: If True, do not raise errors for unknown fields. |
| descriptor_pool: A Descriptor Pool for resolving types. If None use the |
| default. |
| max_recursion_depth: max recursion depth of JSON message to be deserialized. |
| JSON messages over this depth will fail to be deserialized. Default value |
| is 100. |
| |
| Returns: |
| A new message passed from json_dict. |
| """ |
| new_message = message_class() |
| json_format.ParseDict( |
| js_dict=js_dict, |
| message=new_message, |
| ignore_unknown_fields=ignore_unknown_fields, |
| descriptor_pool=descriptor_pool, |
| max_recursion_depth=max_recursion_depth, |
| ) |
| return new_message |
|
|