1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
use std::collections::HashMap;
use serde::{Serialize, Serializer, Deserialize, Deserializer};
use ::codec::{SerializeValue, DeserializeValue};
#[derive(Debug)]
pub enum ValueMap<T> {
Values(HashMap<String, ::Value<T>>),
Ref(String)
}
impl<T> ValueMap<T> {
pub fn as_values(&self) -> Option<&HashMap<String, ::Value<T>>> {
if let &ValueMap::Values(ref values) = self {
Some(values)
} else {
None
}
}
pub fn as_reference(&self) -> Option<&str> {
if let &ValueMap::Ref(ref ref_id) = self {
Some(ref_id)
} else {
None
}
}
}
impl<T> Default for ValueMap<T> {
fn default() -> ValueMap<T> {
ValueMap::Values(HashMap::new())
}
}
#[derive(Serialize, Deserialize)]
struct SerdeRef<'a> {
#[serde(rename = "Ref", borrow)]
ref_id: &'a str
}
#[derive(Serialize)]
#[serde(untagged, bound = "T: SerializeValue")]
enum SerializeValueMap<'a, T: 'a> {
Values(&'a HashMap<String, ::Value<T>>),
#[serde(borrow)]
Ref(SerdeRef<'a>)
}
#[derive(Deserialize)]
#[serde(untagged, bound = "T: DeserializeValue")]
enum DeserializeValueMap<'a, T> {
Values(HashMap<String, ::Value<T>>),
#[serde(borrow)]
Ref(SerdeRef<'a>)
}
impl<T: SerializeValue> Serialize for ValueMap<T> {
fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
let proxy = match self {
&ValueMap::Values(ref values) => SerializeValueMap::Values(values),
&ValueMap::Ref(ref ref_id) => SerializeValueMap::Ref(SerdeRef { ref_id })
};
Serialize::serialize(&proxy, s)
}
}
impl<'de, T: DeserializeValue> Deserialize<'de> for ValueMap<T> {
fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
Deserialize::deserialize(d).map(|proxy| {
match proxy {
DeserializeValueMap::Values(t) => ValueMap::Values(t),
DeserializeValueMap::Ref(SerdeRef { ref_id }) => ValueMap::Ref(ref_id.to_owned())
}
})
}
}