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use crate::HashMap;
use core::{
borrow::Borrow,
hash::{BuildHasher, Hash},
};
use rkyv::{
collections::hash_map::{ArchivedHashMap, HashMapResolver},
ser::{ScratchSpace, Serializer},
Archive, Deserialize, Fallible, Serialize,
};
impl<K: Archive + Hash + Eq, V: Archive, S> Archive for HashMap<K, V, S>
where
K::Archived: Hash + Eq,
{
type Archived = ArchivedHashMap<K::Archived, V::Archived>;
type Resolver = HashMapResolver;
#[inline]
unsafe fn resolve(&self, pos: usize, resolver: Self::Resolver, out: *mut Self::Archived) {
ArchivedHashMap::resolve_from_len(self.len(), pos, resolver, out);
}
}
impl<K, V, S, RandomState> Serialize<S> for HashMap<K, V, RandomState>
where
K: Serialize<S> + Hash + Eq,
K::Archived: Hash + Eq,
V: Serialize<S>,
S: Serializer + ScratchSpace + ?Sized,
{
#[inline]
fn serialize(&self, serializer: &mut S) -> Result<Self::Resolver, S::Error> {
unsafe { ArchivedHashMap::serialize_from_iter(self.iter(), serializer) }
}
}
impl<K: Archive + Hash + Eq, V: Archive, D: Fallible + ?Sized, S: Default + BuildHasher>
Deserialize<HashMap<K, V, S>, D> for ArchivedHashMap<K::Archived, V::Archived>
where
K::Archived: Deserialize<K, D> + Hash + Eq,
V::Archived: Deserialize<V, D>,
{
#[inline]
fn deserialize(&self, deserializer: &mut D) -> Result<HashMap<K, V, S>, D::Error> {
let mut result = HashMap::with_capacity_and_hasher(self.len(), S::default());
for (k, v) in self.iter() {
result.insert(k.deserialize(deserializer)?, v.deserialize(deserializer)?);
}
Ok(result)
}
}
impl<K: Hash + Eq + Borrow<AK>, V, AK: Hash + Eq, AV: PartialEq<V>, S: BuildHasher>
PartialEq<HashMap<K, V, S>> for ArchivedHashMap<AK, AV>
{
#[inline]
fn eq(&self, other: &HashMap<K, V, S>) -> bool {
if self.len() != other.len() {
false
} else {
self.iter()
.all(|(key, value)| other.get(key).map_or(false, |v| value.eq(v)))
}
}
}
impl<K: Hash + Eq + Borrow<AK>, V, AK: Hash + Eq, AV: PartialEq<V>>
PartialEq<ArchivedHashMap<AK, AV>> for HashMap<K, V>
{
#[inline]
fn eq(&self, other: &ArchivedHashMap<AK, AV>) -> bool {
other.eq(self)
}
}
#[cfg(test)]
mod tests {
use crate::HashMap;
use alloc::string::String;
use rkyv::{
archived_root, check_archived_root,
ser::{serializers::AllocSerializer, Serializer},
Deserialize, Infallible,
};
#[test]
fn index_map() {
let mut value = HashMap::new();
value.insert(String::from("foo"), 10);
value.insert(String::from("bar"), 20);
value.insert(String::from("baz"), 40);
value.insert(String::from("bat"), 80);
let mut serializer = AllocSerializer::<4096>::default();
serializer.serialize_value(&value).unwrap();
let result = serializer.into_serializer().into_inner();
let archived = unsafe { archived_root::<HashMap<String, i32>>(result.as_ref()) };
assert_eq!(value.len(), archived.len());
for (k, v) in value.iter() {
let (ak, av) = archived.get_key_value(k.as_str()).unwrap();
assert_eq!(k, ak);
assert_eq!(v, av);
}
let deserialized: HashMap<String, i32> = archived.deserialize(&mut Infallible).unwrap();
assert_eq!(value, deserialized);
}
#[test]
fn validate_index_map() {
let mut value = HashMap::new();
value.insert(String::from("foo"), 10);
value.insert(String::from("bar"), 20);
value.insert(String::from("baz"), 40);
value.insert(String::from("bat"), 80);
let mut serializer = AllocSerializer::<4096>::default();
serializer.serialize_value(&value).unwrap();
let result = serializer.into_serializer().into_inner();
check_archived_root::<HashMap<String, i32>>(result.as_ref())
.expect("failed to validate archived index map");
}
}