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use std::rc::Rc;
use std::sync::Arc;
use futures::Future;
use crate::transform_map_init_err::TransformMapInitErr;
use crate::Service;
pub trait Transform<S> {
type Request;
type Response;
type Error;
type Transform: Service<
Request = Self::Request,
Response = Self::Response,
Error = Self::Error,
>;
type InitError;
type Future: Future<Item = Self::Transform, Error = Self::InitError>;
fn new_transform(&self, service: S) -> Self::Future;
fn map_init_err<F, E>(self, f: F) -> TransformMapInitErr<Self, S, F, E>
where
Self: Sized,
F: Fn(Self::InitError) -> E,
{
TransformMapInitErr::new(self, f)
}
}
impl<T, S> Transform<S> for Rc<T>
where
T: Transform<S>,
{
type Request = T::Request;
type Response = T::Response;
type Error = T::Error;
type InitError = T::InitError;
type Transform = T::Transform;
type Future = T::Future;
fn new_transform(&self, service: S) -> T::Future {
self.as_ref().new_transform(service)
}
}
impl<T, S> Transform<S> for Arc<T>
where
T: Transform<S>,
{
type Request = T::Request;
type Response = T::Response;
type Error = T::Error;
type InitError = T::InitError;
type Transform = T::Transform;
type Future = T::Future;
fn new_transform(&self, service: S) -> T::Future {
self.as_ref().new_transform(service)
}
}
pub trait IntoTransform<T, S>
where
T: Transform<S>,
{
fn into_transform(self) -> T;
}
impl<T, S> IntoTransform<T, S> for T
where
T: Transform<S>,
{
fn into_transform(self) -> T {
self
}
}