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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
use super::ZeroHashMap;
use crate::{
map::{ZeroMapKV, ZeroVecLike},
ZeroVec,
};
use serde::{de, Deserialize, Serialize};
impl<'a, K, V> Serialize for ZeroHashMap<'a, K, V>
where
K: ZeroMapKV<'a> + Serialize + ?Sized,
V: ZeroMapKV<'a> + Serialize + ?Sized,
K::Container: Serialize,
V::Container: Serialize,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
(&self.displacements, &self.keys, &self.values).serialize(serializer)
}
}
impl<'de, 'a, K, V> Deserialize<'de> for ZeroHashMap<'a, K, V>
where
K: ZeroMapKV<'a> + ?Sized,
V: ZeroMapKV<'a> + ?Sized,
K::Container: Deserialize<'de>,
V::Container: Deserialize<'de>,
'de: 'a,
{
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
let (displacements, keys, values): (ZeroVec<(u32, u32)>, K::Container, V::Container) =
Deserialize::deserialize(deserializer)?;
if keys.zvl_len() != values.zvl_len() {
return Err(de::Error::custom(
"Mismatched key and value sizes in ZeroHashMap",
));
}
if displacements.zvl_len() != keys.zvl_len() {
return Err(de::Error::custom(
"Mismatched displacements and key, value sizes in ZeroHashMap",
));
}
Ok(Self {
displacements,
keys,
values,
})
}
}
#[cfg(test)]
mod test {
use crate::{VarZeroVec, ZeroHashMap, ZeroVec};
use serde::{Deserialize, Serialize};
const JSON_STR: &str = "[[[0,0],[0,1],[0,1]],[1,2,0],[\"b\",\"c\",\"a\"]]";
const BINCODE_BYTES: &[u8] = &[
24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0,
0, 0, 12, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0,
3, 0, 0, 0, 0, 0, 1, 0, 2, 0, 98, 99, 97,
];
#[derive(Serialize, Deserialize)]
struct DeriveTestZeroHashMap<'data> {
#[serde(borrow)]
_data: ZeroHashMap<'data, str, [u8]>,
}
fn make_zerohashmap() -> ZeroHashMap<'static, u32, str> {
ZeroHashMap::from_iter([(0, "a"), (1, "b"), (2, "c")])
}
fn build_invalid_hashmap_str(
displacements: Vec<(u32, u32)>,
keys: Vec<u32>,
values: Vec<&str>,
) -> String {
let invalid_hm: ZeroHashMap<u32, str> = ZeroHashMap {
displacements: ZeroVec::alloc_from_slice(&displacements),
keys: ZeroVec::alloc_from_slice(&keys),
values: VarZeroVec::<str>::from(&values),
};
serde_json::to_string(&invalid_hm).expect("serialize")
}
#[test]
fn test_invalid_deser_zhm() {
// Invalid hashmap |keys| != |values|
let mut invalid_hm_str =
build_invalid_hashmap_str(vec![(0, 1), (0, 0)], vec![1, 2], vec!["a", "b", "c"]);
assert_eq!(
serde_json::from_str::<ZeroHashMap<u32, str>>(&invalid_hm_str)
.unwrap_err()
.to_string(),
"Mismatched key and value sizes in ZeroHashMap"
);
// Invalid hashmap |displacements| != |keys| == |values|
// |displacements| = 2, |keys| = 3, |values| = 3
invalid_hm_str =
build_invalid_hashmap_str(vec![(0, 1), (0, 0)], vec![2, 1, 0], vec!["a", "b", "c"]);
assert_eq!(
serde_json::from_str::<ZeroHashMap<u32, str>>(&invalid_hm_str)
.unwrap_err()
.to_string(),
"Mismatched displacements and key, value sizes in ZeroHashMap"
);
}
#[test]
fn test_serde_valid_deser_zhm() {
let hm = make_zerohashmap();
let json_str = serde_json::to_string(&hm).expect("serialize");
assert_eq!(json_str, JSON_STR);
let deserialized_hm: ZeroHashMap<u32, str> =
serde_json::from_str(JSON_STR).expect("deserialize");
assert_eq!(
hm.iter().collect::<Vec<_>>(),
deserialized_hm.iter().collect::<Vec<_>>()
);
}
#[test]
fn test_bincode_zhm() {
let hm = make_zerohashmap();
let bincode_bytes = bincode::serialize(&hm).expect("serialize");
assert_eq!(bincode_bytes, BINCODE_BYTES);
let deserialized_hm: ZeroHashMap<u32, str> =
bincode::deserialize(BINCODE_BYTES).expect("deserialize");
assert_eq!(
hm.iter().collect::<Vec<_>>(),
deserialized_hm.iter().collect::<Vec<_>>()
);
}
}