public static void SetCustomConverterForDictionaryProperty()
{
DefaultJsonTypeInfoResolver resolver = new();
resolver.Modifiers.Add((ti) =>
{
if (ti.Type == typeof(TestClassWithDictionaries))
{
Assert.Equal(JsonTypeInfoKind.Object, ti.Kind);
foreach (var prop in ti.Properties)
{
if (prop.Name == nameof(TestClassWithDictionaries.DictionaryProperty1))
{
prop.CustomConverter = new AddDictionaryEntryConverter();
}
}
}
});
JsonSerializerOptions options = new JsonSerializerOptions();
options.IncludeFields = true;
options.TypeInfoResolver = resolver;
TestClassWithDictionaries originalObj = new TestClassWithDictionaries()
{
DictionaryProperty1 = new Dictionary <string, int>
{
["test1"] = 4,
["test2"] = 5,
},
DictionaryProperty2 = new Dictionary <string, int>
{
["foo"] = 1,
["bar"] = 8,
},
};
string json = JsonSerializer.Serialize(originalObj, options);
Assert.Equal("" "{" DictionaryProperty1 ":{" test1 ":4," test2 ":5," * test * ":-1}," DictionaryProperty2 ":{" foo ":1," bar ":8}}" "", json);
TestClassWithDictionaries deserialized = JsonSerializer.Deserialize <TestClassWithDictionaries>(json, options);
Assert.Equal(originalObj.DictionaryProperty1, deserialized.DictionaryProperty1);
Assert.Equal(originalObj.DictionaryProperty2, deserialized.DictionaryProperty2);
}
public static void CreateObjectForDictionaryWithDefaults(bool useTypedCreateObject)
{
DefaultJsonTypeInfoResolver resolver = new();
resolver.Modifiers.Add((ti) =>
{
if (ti.Type == typeof(Dictionary <string, int>))
{
Func <Dictionary <string, int> > createObj = () => new Dictionary <string, int> {
["*test*"] = -1
};
if (useTypedCreateObject)
{
JsonTypeInfo <Dictionary <string, int> > typedTi = ti as JsonTypeInfo <Dictionary <string, int> >;
Assert.NotNull(typedTi);
typedTi.CreateObject = createObj;
}
else
{
// we want to make sure Func is not a cast to the untyped one
ti.CreateObject = () => createObj();
}
}
});
JsonSerializerOptions options = new JsonSerializerOptions();
options.IncludeFields = true;
options.TypeInfoResolver = resolver;
TestClassWithDictionaries originalObj = new()
{
DictionaryProperty1 = new Dictionary <string, int> {
["test1"] = 2, ["test2"] = 3
},
DictionaryProperty2 = new Dictionary <string, int>(),
};
string json = JsonSerializer.Serialize(originalObj, options);
Assert.Equal("" "{" DictionaryProperty1 ":{" test1 ":2," test2 ":3}," DictionaryProperty2 ":{}}" "", json);
TestClassWithDictionaries deserialized = JsonSerializer.Deserialize <TestClassWithDictionaries>(json, options);
Assert.Equal(new Dictionary <string, int> {
["*test*"] = -1, ["test1"] = 2, ["test2"] = 3
}, deserialized.DictionaryProperty1);
Assert.Equal(new Dictionary <string, int> {
["*test*"] = -1
}, deserialized.DictionaryProperty2);
json = @"{}";
deserialized = JsonSerializer.Deserialize <TestClassWithDictionaries>(json, options);
Assert.Null(deserialized.DictionaryProperty1);
Assert.Null(deserialized.DictionaryProperty2);
json = "" "{" DictionaryProperty2 ":{" foo ":123}}" "";
deserialized = JsonSerializer.Deserialize <TestClassWithDictionaries>(json, options);
Assert.Null(deserialized.DictionaryProperty1);
Assert.Equal(new Dictionary <string, int> {
["*test*"] = -1, ["foo"] = 123
}, deserialized.DictionaryProperty2);
}
