public IConverter Create(Type type, object[] converterParameters)
{
// if a custom converter has been specified using the CustomConverterAttribute,
// we use this converter instead.
Type customConverterType = JsonCustomConverterAttribute.GetConverterType(type, out object[] parametersAtType);
if (customConverterType == null)
{
throw new Exception($"The {nameof(CustomConverterFactory)} cannot be used for type {type}, because the {nameof(JsonCustomConverterAttribute)} is not defined for this type.");
}
return(ConverterFactoryHelper.CreateConverter(customConverterType, type, converterParameters ?? parametersAtType));
}
private static Type FindBaseClass(Type type)
{
while (type != null && type != typeof(object))
{
JsonCustomConverterAttribute attr = (JsonCustomConverterAttribute)Attribute.GetCustomAttribute(type, typeof(JsonCustomConverterAttribute), false);
if (attr != null && attr.ConverterType == typeof(TypedConverterFactory))
{
return(type);
}
type = type.BaseType;
}
throw new Exception($"{nameof(TypedConverterFactory)} was not found somewhere in the inheritence chain of {type.Name}.");
}
internal static Type GetConverterType(MemberInfo memberInfo, out object[] converterParameters)
{
converterParameters = null;
JsonCustomConverterAttribute att = memberInfo.GetCustomAttribute <JsonCustomConverterAttribute>(true);
if (att == null)
{
return(null);
}
if (att.ConverterType == null)
{
throw new Exception($"{nameof(ConverterType)} must not be null in {nameof(JsonCustomConverterAttribute)} for member {memberInfo.Name} of type {memberInfo.ReflectedType}.");
}
converterParameters = att.GetParameters();
return(att.ConverterType);
}
internal static Type GetConverterType(Type type, out object[] converterParameters)
{
converterParameters = null;
JsonCustomConverterAttribute att = type.GetCustomAttribute <JsonCustomConverterAttribute>(true);
if (att == null)
{
return(null);
}
if (att.ConverterType == null)
{
throw new Exception($"{nameof(ConverterType)} must not be null in {nameof(JsonCustomConverterAttribute)} for type {type.Name}.");
}
converterParameters = att.GetParameters();
return(att.ConverterType);
}
private void AddProperty(MemberInfo memberInfo, Func <object, object> getter, Action <object, object> setter, Type propertyType)
{
// check, if a custom converter has been assigned
Type converterType = JsonCustomConverterAttribute.GetConverterType(memberInfo, out object[] converterParameters);
IConverter converter = ConverterFactoryHelper.CreateConverter(converterType, propertyType, converterParameters);
// check, if a custom property name should be used
JsonPropertyAttribute jsonProperty = memberInfo.GetCustomAttribute <JsonPropertyAttribute>(true);
mProps.Add(memberInfo.Name, new PropInfo
{
Name = jsonProperty?.Name ?? memberInfo.Name,
Setter = setter,
Getter = getter,
Converter = converter,
DefaultValue = GetDefaultValue(propertyType),
SuppressDefaultValue = SuppressDefaultValue(memberInfo),
EmitNullValue = EmitNullValue(memberInfo)
});
}
