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
|
#nullable enable
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Reflection;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace MediaBrowser.Common.Json.Converters
{
/// <summary>
/// Converter for Dictionaries without string key.
/// TODO This can be removed when System.Text.Json supports Dictionaries with non-string keys.
/// </summary>
/// <typeparam name="TKey">Type of key.</typeparam>
/// <typeparam name="TValue">Type of value.</typeparam>
internal sealed class JsonNonStringKeyDictionaryConverter<TKey, TValue> : JsonConverter<IDictionary<TKey, TValue>>
{
/// <summary>
/// Read JSON.
/// </summary>
/// <param name="reader">The Utf8JsonReader.</param>
/// <param name="typeToConvert">The type to convert.</param>
/// <param name="options">The json serializer options.</param>
/// <returns>Typed dictionary.</returns>
/// <exception cref="NotSupportedException">Dictionary key type not supported.</exception>
public override IDictionary<TKey, TValue> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var convertedType = typeof(Dictionary<,>).MakeGenericType(typeof(string), typeToConvert.GenericTypeArguments[1]);
var value = JsonSerializer.Deserialize(ref reader, convertedType, options);
var instance = (Dictionary<TKey, TValue>)Activator.CreateInstance(
typeToConvert,
BindingFlags.Instance | BindingFlags.Public,
null,
null,
CultureInfo.CurrentCulture);
var enumerator = (IEnumerator)convertedType.GetMethod("GetEnumerator")!.Invoke(value, null);
var parse = typeof(TKey).GetMethod(
"Parse",
0,
BindingFlags.Public | BindingFlags.Static,
null,
CallingConventions.Any,
new[] { typeof(string) },
null);
if (parse == null)
{
throw new NotSupportedException($"{typeof(TKey)} as TKey in IDictionary<TKey, TValue> is not supported.");
}
while (enumerator.MoveNext())
{
var element = (KeyValuePair<string?, TValue>)enumerator.Current;
instance.Add((TKey)parse.Invoke(null, new[] { (object?)element.Key }), element.Value);
}
return instance;
}
/// <summary>
/// Write dictionary as Json.
/// </summary>
/// <param name="writer">The Utf8JsonWriter.</param>
/// <param name="value">The dictionary value.</param>
/// <param name="options">The Json serializer options.</param>
public override void Write(Utf8JsonWriter writer, IDictionary<TKey, TValue> value, JsonSerializerOptions options)
{
var convertedDictionary = new Dictionary<string?, TValue>(value.Count);
foreach (var (k, v) in value)
{
if (k != null)
{
convertedDictionary[k.ToString()] = v;
}
}
JsonSerializer.Serialize(writer, convertedDictionary, options);
}
}
}
|
