public override void WriteJson(JsonWriter writer, object v, JsonSerializer serializer)
{
var conversion = KeyValueConversion.Create <TContainer, TValue>();
if (conversion == null)
{
writer.WriteNull();
return;
}
;
var key = conversion.KeyProperty.ValueProvider.GetValue(v).ToString();
var value = conversion.ValueProperty.ValueProvider.GetValue(v);
if (key.IsNullOrEmpty() || value == null)
{
writer.WriteNull();
return;
}
;
writer.WriteStartObject();
writer.WritePropertyName(key);
serializer.Serialize(writer, value);
writer.WriteEndObject();
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType != JsonToken.StartObject)
{
return(null);
}
var depth = reader.Depth;
reader.Read(); //property name
var key = reader.Value as string;
reader.Read(); //{
var value = serializer.Deserialize <TValue>(reader);
if (reader.Depth > depth)
{
do
{
reader.Read();
} while (reader.Depth >= depth && reader.TokenType != JsonToken.EndObject);
}
var conversion = KeyValueConversion.Create <TContainer, TValue>();
if (conversion == null)
{
return(null);
}
var o = new TContainer();
conversion.KeyProperty.ValueProvider.SetValue(o, key);
conversion.ValueProperty.ValueProvider.SetValue(o, value);
return(o);
}
public static KeyValueConversion Create <TContainer, TValue>() where TContainer : class, new()
{
var t = typeof(TContainer);
KeyValueConversion conversion;
if (KnownTypes.TryGetValue(t, out conversion))
{
return(conversion);
}
var properties = t.GetCachedObjectProperties(MemberSerialization.OptOut);
var keyProp = properties.FirstOrDefault(p => p.PropertyType != typeof(TValue));
var valueProp = properties.FirstOrDefault(p => p.PropertyType == typeof(TValue));
if (keyProp == null)
{
throw new Exception($"No key property found on type {t.Name}");
}
if (valueProp == null)
{
throw new Exception($"No value property found on type {t.Name}");
}
conversion = new KeyValueConversion {
KeyProperty = keyProp, ValueProperty = valueProp
};
KnownTypes.TryAdd(t, conversion);
return(conversion);
}
