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use std::any::TypeId;
use std::rc::Rc;
use std::sync::Arc;
use crate::inject::Inject;
use crate::Container;
use crate::InjectError;
pub trait Provider {
type ProvidedType: 'static;
fn provide(&self, container: &Container) -> Result<Self::ProvidedType, InjectError>;
fn id(&self) -> TypeId {
TypeId::of::<Self::ProvidedType>()
}
}
impl<T: ?Sized + 'static> Provider for Arc<T> {
type ProvidedType = Self;
fn provide(&self, container: &Container) -> Result<Self::ProvidedType, InjectError> {
Ok(Arc::clone(&self))
}
}
impl<F, T: Inject> Provider for F
where
F: Fn(&Container) -> Result<T, InjectError>,
{
type ProvidedType = T;
fn provide(&self, container: &Container) -> Result<Self::ProvidedType, InjectError> {
self(container)
}
}
pub trait RefProvider {
type ProvidedRef: 'static;
fn provide<'a>(
&'a self,
container: &'a Container,
) -> Result<&'a Self::ProvidedRef, InjectError>;
fn id(&self) -> TypeId {
TypeId::of::<&Self::ProvidedRef>()
}
}
impl<T: Inject> RefProvider for Arc<T> {
type ProvidedRef = T;
fn provide<'a>(&'a self, _: &'a Container) -> Result<&'a T, InjectError> {
Ok(&self)
}
}
impl<T: Inject> RefProvider for Rc<T> {
type ProvidedRef = T;
fn provide<'a>(&'a self, _: &'a Container) -> Result<&'a T, InjectError> {
Ok(&self)
}
}
impl<T: Inject> RefProvider for Box<T> {
type ProvidedRef = T;
fn provide<'a>(&'a self, _: &'a Container) -> Result<&'a T, InjectError> {
Ok(&self)
}
}