public void JsonConverter_CanConvert_Test()
{
var result = _jsonConverter.CanConvert(typeof(TaskQueueInfoDto));
result.ShouldBeFalse();
var result1 = _jsonConverter.CanConvert(typeof(Address));
result1.ShouldBeTrue();
}
private static JsonConverter GetRuntimeProvidedCustomConverter(System.Type type, JsonSerializerOptions options)
{
System.Collections.Generic.IList <JsonConverter> converters = options.Converters;
for (int i = 0; i < converters.Count; i++)
{
JsonConverter converter = converters[i];
if (converter.CanConvert(type))
{
if (converter is JsonConverterFactory factory)
{
converter = factory.CreateConverter(type, options);
if (converter == null || converter is JsonConverterFactory)
{
throw new System.InvalidOperationException($"The converter '{factory.GetType()}' cannot return null or a JsonConverterFactory instance.");
}
}
return(converter);
}
}
return(null);
}
protected override JsonConverter ResolveContractConverter(Type objectType)
{
//if (ErrorConverter.CanConvertStatic(objectType))
// return new ErrorConverter();
//if (ErrorListConverter.CanConvertStatic(objectType))
// return new ErrorListConverter();
if (ResourceObjectConverter.CanConvert(objectType))
{
return(ResourceObjectConverter);
}
if (_resourceListConverter.CanConvert(objectType))
{
return(_resourceListConverter);
}
if (DocumentRootConverter.CanConvertStatic(objectType))
{
return(new DocumentRootConverter(_href));
}
return(base.ResolveContractConverter(objectType));
}
private static void GenericConverterTestHelper <T>(string converterName, object objectValue, string stringValue, JsonSerializerOptions options, bool nullOptionOkay = true)
{
JsonConverter <T> converter = (JsonConverter <T>)options.GetConverter(typeof(T));
Assert.True(converter.CanConvert(typeof(T)));
Assert.Equal(converterName, converter.GetType().Name);
ReadOnlySpan <byte> data = Encoding.UTF8.GetBytes(stringValue);
Utf8JsonReader reader = new Utf8JsonReader(data);
reader.Read();
T valueRead = converter.Read(ref reader, typeof(T), nullOptionOkay ? null: options);
Assert.Equal(objectValue, valueRead);
if (reader.TokenType != JsonTokenType.EndObject)
{
valueRead = converter.Read(ref reader, typeof(T), options); // Test with given option if reader position haven't advanced.
Assert.Equal(objectValue, valueRead);
}
using (var stream = new MemoryStream())
using (var writer = new Utf8JsonWriter(stream))
{
converter.Write(writer, (T)objectValue, options);
writer.Flush();
Assert.Equal(stringValue, Encoding.UTF8.GetString(stream.ToArray()));
writer.Reset(stream);
converter.Write(writer, (T)objectValue, nullOptionOkay ? null : options);
writer.Flush();
Assert.Equal(stringValue + stringValue, Encoding.UTF8.GetString(stream.ToArray()));
}
}
protected override JsonConverter ResolveContractConverter(Type objectType)
{
if (ErrorConverter.CanConvertStatic(objectType))
{
return(new ErrorConverter());
}
if (ErrorListConverter.CanConvertStatic(objectType))
{
return(new ErrorListConverter());
}
if (ResourceObjectConverter.CanConvert(objectType))
{
return(ResourceObjectConverter);
}
if (_resourceObjectListConverter.CanConvert(objectType))
{
return(_resourceObjectListConverter);
}
if (LinkConverter.CanConvertStatic(objectType))
{
return(new LinkConverter());
}
if (DocumentRootConverter.CanConvertStatic(objectType))
{
return(new DocumentRootConverter());
}
return(base.ResolveContractConverter(objectType));
}
private JsonConverter GetRuntimeProvidedCustomConverter(Type type)
{
IList <JsonConverter> converters = Options.Converters;
for (int i = 0; i < converters.Count; i++)
{
JsonConverter converter = converters[i];
if (converter.CanConvert(type))
{
if (converter is JsonConverterFactory factory)
{
converter = factory.CreateConverter(type, Options);
if (converter == null || converter is JsonConverterFactory)
{
throw new InvalidOperationException($"The converter '{factory.GetType()}' cannot return null or a JsonConverterFactory instance.");
}
}
return(converter);
}
}
return(null);
}
public static JsonConverter GetJsonConverter(ICustomAttributeProvider attributeProvider, Type targetConvertedType)
{
object provider = null;
#if !NETFX_CORE
provider = attributeProvider as MemberInfo;
#else
provider = attributeProvider.UnderlyingObject;
#endif
Type converterType = GetJsonConverterType(attributeProvider);
if (converterType != null)
{
JsonConverter memberConverter = JsonConverterAttribute.CreateJsonConverterInstance(converterType);
if (!memberConverter.CanConvert(targetConvertedType))
{
throw new JsonSerializationException("JsonConverter {0} on {1} is not compatible with member type {2}.".FormatWith(CultureInfo.InvariantCulture, memberConverter.GetType().Name, provider, targetConvertedType.Name));
}
return(memberConverter);
}
return(null);
}
public override bool CanConvert(Type objectType)
{
if (MaskTypes.Contains(objectType))
{
return(false);
}
return(_Inner.CanConvert(objectType));
}
protected T ReadBson <T>(String bson, JsonConverter converter)
{
if (!converter.CanConvert(typeof(T)))
{
throw new InvalidOperationException();
}
using (var memoryStream = new MemoryStream(Convert.FromBase64String(RemovePreamble(bson)), writable: false))
using (var bsonReader = new BsonReader(memoryStream))
return((T)converter.ReadJson(bsonReader, typeof(T), null, NewtonsoftBsonSerializer.Default.Serializer));
}
protected T ReadJson <T>(String json, JsonConverter converter)
{
if (!converter.CanConvert(typeof(T)))
{
throw new InvalidOperationException();
}
using (var stringReader = new StringReader(RemovePreamble(json)))
using (var jsonReader = new JsonTextReader(stringReader))
return((T)converter.ReadJson(jsonReader, typeof(T), null, NewtonsoftBsonSerializer.Default.Serializer));
}
public override bool CanConvert(Type objectType)
{
if (objectType.IsGenericType && objectType.Name.Equals(typeof(List <>).Name))
{
var genericArgument = objectType.GetGenericArguments().FirstOrDefault();
if (genericArgument != null)
{
return(_elementConverter.CanConvert(genericArgument));
}
}
return(false);
}
private static void TestOptionsConverter <T>(
JsonConverter converter,
T some,
T none = default) where T : IOption <Boxed <int> >
{
Assert.True(converter.CanRead);
Assert.True(converter.CanWrite);
Assert.True(converter.CanConvert(some.GetType()));
Assert.False(converter.CanConvert(typeof(int)));
var settings = new JsonSerializerSettings
{
ContractResolver = new CustomContractResolver(converter, some.GetType())
};
var someStr = JsonConvert.SerializeObject(some, settings);
Assert.AreEqual(some, JsonConvert.DeserializeObject <T>(someStr, settings));
var strNone = JsonConvert.SerializeObject(none, settings);
Assert.AreEqual(none, JsonConvert.DeserializeObject <T>(strNone, settings));
}
/// <inheritdoc />
protected override JsonContract CreateContract(Type objectType)
{
JsonContract contract = base.CreateContract(objectType);
if (DateTimeConverter.CanConvert(objectType))
{
contract.Converter = DateTimeConverter;
}
else if (ExplicitNullConverter.CanConvert(objectType))
{
contract.Converter = ExplicitNullConverter;
}
return(contract);
}
protected String WriteBson <T>(T value, JsonConverter converter)
{
if (!converter.CanConvert(typeof(T)))
{
throw new InvalidOperationException();
}
using (var memoryStream = new MemoryStream())
using (var bsonWriter = new BsonWriter(memoryStream))
{
converter.WriteJson(bsonWriter, value, NewtonsoftBsonSerializer.Default.Serializer);
return(Convert.ToBase64String(memoryStream.ToArray()));
}
}
public static JsonConverter GetJsonConverter(ICustomAttributeProvider attributeProvider, Type targetConvertedType)
{
Type jsonConverterType = GetJsonConverterType(attributeProvider);
if (jsonConverterType != null)
{
JsonConverter jsonConverter = JsonConverterAttribute.CreateJsonConverterInstance(jsonConverterType);
if (!jsonConverter.CanConvert(targetConvertedType))
{
throw new JsonSerializationException("JsonConverter {0} on {1} is not compatible with member type {2}.".FormatWith(CultureInfo.InvariantCulture, jsonConverter.GetType().Name, attributeProvider, targetConvertedType.Name));
}
return(jsonConverter);
}
return(null);
}
private void GenerateILForCallingConverter(Type valueType, Action pushValueOntoStack, JsonConverter converter)
{
if (!converter.CanConvert(valueType))
{
throw new InvalidOperationException("Converter is not compatible.");
}
Type converterType = converter.GetType();
Type converterGenericTypeParameter = GetConverterGenericType(converterType);
Type converterGenericType = typeof(JsonConverter <>).MakeGenericType(new Type[] {
converterGenericTypeParameter
});
// Save converter to a global variable
FieldBuilder converterField;
if (!_converterCache.TryGetValue(converter, out converterField))
{
string fieldName = @"Converter" + (++_converterCounter);
converterField = _tb.DefineField(
fieldName: fieldName,
// Default converters are internal classes so here the abstract generic type must be used.
type: converterGenericType,
attributes: FieldAttributes.Public | FieldAttributes.Static
);
_converterCache.Add(converter, converterField);
_followUp += type =>
{
FieldInfo field = type.GetField(fieldName);
field.SetValue(null, converter);
};
}
// converter.Write(writer, obj.Property, _options);
_ilg.Emit(OpCodes.Ldsfld, converterField);
_ilg.Emit(OpCodes.Ldarg_1);
pushValueOntoStack();
_ilg.Emit(OpCodes.Ldsfld, _optionsField);
_ilg.Emit(OpCodes.Callvirt, converterGenericType.GetMethod("Write", new Type[] {
typeof(Utf8JsonWriter),
converterGenericTypeParameter,
typeof(JsonSerializerOptions)
}));
MarkNewJumpTableLabel();
}
public void CanConvert_IfObjectTypeIsInMapping_ReturnsTrue()
{
// Arrange
Type typeInMapping = typeof(object);
IDictionary <string, Type> typeMapping = new Dictionary <string, Type>
{
{ "IgnoreTypeName", typeInMapping }
};
JsonConverter product = CreateProductUnderTest(typeMapping);
// Act
bool canConvert = product.CanConvert(typeInMapping);
// Assert
Assert.True(canConvert);
}
protected String WriteJson <T>(T value, JsonConverter converter)
{
if (!converter.CanConvert(typeof(T)))
{
throw new InvalidOperationException();
}
NewtonsoftJsonSerializer.Default.Serializer.Formatting = Formatting.Indented;
var sb = new StringBuilder();
using (var stringWriter = new StringWriter(sb))
using (var jsonWriter = new JsonTextWriter(stringWriter))
converter.WriteJson(jsonWriter, value, NewtonsoftJsonSerializer.Default.Serializer);
return(sb.ToString());
}
// Taken from Newtonsoft's Json.NET JsonSerializer
internal static JsonConverter GetMatchingConverter(IList <JsonConverter> converters, Type objectType)
{
ValidationUtils.ArgumentNotNull(objectType, "objectType");
if (converters != null)
{
for (int i = 0; i < converters.Count; i++)
{
JsonConverter converter = converters[i];
if (converter.CanConvert(objectType))
{
return(converter);
}
}
}
return(null);
}
// Taken from Newtonsoft's Json.NET JsonSerializer
internal static JsonConverter GetMatchingConverter(IList <JsonConverter> converters, Type objectType)
{
if (objectType == null)
{
throw new ArgumentNullException("objectType");
}
if (converters != null)
{
for (int i = 0; i < converters.Count; i++)
{
JsonConverter converter = converters[i];
if (converter.CanConvert(objectType))
{
return(converter);
}
}
}
return(null);
}
/// <inheritdoc /> public override bool CanConvert(Type objectType) => _instantTimeConverter.CanConvert(objectType) || _logicalTimeConverter.CanConvert(objectType);
/// <summary>
/// Indicates if the <see cref="NullHandlingConverter"/> can be used with
/// a given type.
/// </summary>
/// <param name="objectType">
/// The type under consideration.
/// </param>
/// <returns>
/// <c>true</c> for value types and <c>false</c> otherwise.
/// </returns>
public override bool CanConvert(Type objectType)
{
return(objectType.GetTypeInfo().IsValueType || (inner != null && inner.CanConvert(objectType)));
}
public override bool CanConvert(Type typeToConvert)
{
return(original.CanConvert(typeToConvert));
}
public override bool CanConvert(Type objectType)
{
return(_inner.CanConvert(objectType) || objectType == typeof(PropertyExceptionDescriptor));
}
public override bool CanConvert(Type objectType) => original.CanConvert(objectType);
public override bool CanConvert(Type objectType) => _converter.CanConvert(objectType);
public override bool CanConvert(Type objectType)
{
return(converter.CanConvert(objectType));
}
public static void AssertCanConvert(JsonConverter subject, object o)
{
subject.CanConvert(o.GetType()).Should().BeTrue();
}
public override bool CanConvert(Type objectType)
{
Type elementType;
return(ListUtil.IsList(objectType, out elementType) && ResourceObjectConverter.CanConvert(elementType));
}
public static bool CanConvertStatic(Type objectType, JsonConverter elementConvertor)
{
return(ListUtil.IsList(objectType, out Type elementType) &&
elementConvertor.CanConvert(elementType));
}
