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48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
from typing import *
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from typing_extensions import Self
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# XXX
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# Note that MessageType "subclasses" are not true subclasses, but instead instances
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# of the built-in metaclass MsgDef. MessageType instances are in fact instances of
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# the built-in type Msg. That is why isinstance checks do not work, and instead the
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# MessageTypeSubclass.is_type_of() method must be used.
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# rust/src/protobuf/obj.rs
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class MessageType:
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MESSAGE_NAME: ClassVar[str] = "MessageType"
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MESSAGE_WIRE_TYPE: ClassVar[int | None] = None
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@classmethod
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def is_type_of(cls: type[Self], msg: "MessageType") -> TypeGuard[Self]:
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"""Identify if the provided message belongs to this type."""
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T = TypeVar("T", bound=MessageType)
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# rust/src/protobuf/obj.rs
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def type_for_name(name: str) -> type[MessageType]:
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"""Find the message definition for the given protobuf name."""
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# rust/src/protobuf/obj.rs
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def type_for_wire(wire_id: int) -> type[MessageType]:
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"""Find the message definition for the given wire type (numeric identifier)."""
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# rust/src/protobuf/obj.rs
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def decode(
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buffer: bytes,
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msg_type: type[T],
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enable_experimental: bool,
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) -> T:
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"""Decode data in the buffer into the specified message type."""
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# rust/src/protobuf/obj.rs
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def encoded_length(msg: MessageType) -> int:
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"""Calculate length of encoding of the specified message."""
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# rust/src/protobuf/obj.rs
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def encode(buffer: bytearray, msg: MessageType) -> int:
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"""Encode the message into the specified buffer. Return length of
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encoding."""
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