architect-api 11.6.3

//! A tonic codec that does nothing.  Used to provide a stub implementation
//! that can be used in place of a real codec generated by derive macro.

use std::marker::PhantomData;
use tonic::{
    codec::{Codec, DecodeBuf, Decoder, EncodeBuf, Encoder},
    Status,
};

#[derive(Debug)]
pub struct AnyEncoder<T>(PhantomData<T>);

impl<T> Encoder for AnyEncoder<T> {
    type Error = Status;
    type Item = T;

    fn encode(
        &mut self,
        _item: Self::Item,
        _buf: &mut EncodeBuf<'_>,
    ) -> Result<(), Self::Error> {
        Err(Status::unavailable("invalid codec"))
    }
}

#[derive(Debug)]
pub struct AnyDecoder<U>(PhantomData<U>);

impl<U> Decoder for AnyDecoder<U> {
    type Error = Status;
    type Item = U;

    fn decode(
        &mut self,
        _buf: &mut DecodeBuf<'_>,
    ) -> Result<Option<Self::Item>, Self::Error> {
        Err(Status::unavailable("invalid codec"))
    }
}

#[derive(Debug, Clone)]
pub struct AnyCodec<T, U>(PhantomData<(T, U)>);

impl<T, U> Default for AnyCodec<T, U> {
    fn default() -> Self {
        Self(PhantomData)
    }
}

impl<T, U> Codec for AnyCodec<T, U>
where
    T: Send + 'static,
    U: Send + 'static,
{
    type Encode = T;
    type Decode = U;
    type Encoder = AnyEncoder<T>;
    type Decoder = AnyDecoder<U>;

    fn encoder(&mut self) -> Self::Encoder {
        AnyEncoder(PhantomData)
    }

    fn decoder(&mut self) -> Self::Decoder {
        AnyDecoder(PhantomData)
    }
}