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use alloc::sync::Arc;
use core::convert::Infallible;
use rkyv::ser::Serializer;
use bytecheck::CheckBytes;
use rkyv::validation::validators::DefaultValidator;
use rkyv::{check_archived_root, Archive, Fallible, Serialize};
use crate::{Ident, Store, StoreProvider, StoreSerializer, Stored};
use super::{Token, TokenBuffer};
pub struct StoreRef<I> {
inner: Arc<dyn Store<Identifier = I>>,
}
impl<I> StoreRef<I> {
pub fn new<S: 'static + Store<Identifier = I>>(store: S) -> StoreRef<I> {
StoreRef {
inner: Arc::new(store),
}
}
}
impl<I> StoreRef<I> {
pub fn store<T>(&self, t: &T) -> Stored<T, I>
where
T: Serialize<StoreSerializer<I>>,
{
Stored::new(self.clone(), self.put(t))
}
pub fn put<T>(&self, t: &T) -> Ident<T, I>
where
T: Serialize<StoreSerializer<I>>,
{
let mut ser = self.serializer();
ser.serialize(t);
let id = ser.commit();
Ident::new(id)
}
pub fn put_raw(&self, bytes: &[u8]) -> I {
let mut ser = self.serializer();
ser.write(bytes).unwrap();
ser.commit()
}
pub fn serializer(&self) -> StoreSerializer<I> {
StoreSerializer::new(self.clone(), self.inner.request_buffer())
}
pub fn get<T>(&self, ident: &Ident<T, I>) -> &T::Archived
where
T: Archive,
T::Archived: for<'a> CheckBytes<DefaultValidator<'a>>,
{
let buffer = self.get_raw(ident.erase());
let root = check_archived_root::<T>(buffer).unwrap();
root
}
pub fn get_raw(&self, i: &I) -> &[u8] {
self.inner.get(i)
}
pub fn persist(&self) -> Result<(), ()> {
self.inner.persist()
}
pub fn commit(&self, buffer: &mut TokenBuffer) -> I {
self.inner.commit(buffer)
}
pub fn extend(&self, buffer: &mut TokenBuffer) -> Result<(), ()> {
self.inner.extend(buffer)
}
pub fn return_token(&self, token: Token) {
self.inner.return_token(token)
}
}
impl<I> StoreProvider<I> for StoreRef<I> {
fn store(&self) -> &StoreRef<I> {
self
}
}
impl<I> Clone for StoreRef<I> {
fn clone(&self) -> Self {
Self {
inner: self.inner.clone(),
}
}
}
impl<I> Fallible for StoreRef<I> {
type Error = Infallible;
}