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Add AnyOf.Newtonsoft.Json project (#12)
* AnyOfJsonConverter * . * .
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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <Title>AnyOf.Newtonsoft.Json</Title> | ||
| <TargetFrameworks>net45;netstandard1.3;netstandard2.0;netstandard2.1</TargetFrameworks> | ||
| <ProjectGuid>{31D0104F-3E63-4223-A4AD-372E68A6B0CB}</ProjectGuid> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="Newtonsoft.Json" Version="9.0.1" /> | ||
| </ItemGroup> | ||
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| <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' "> | ||
| <PackageReference Include="System.Reflection" Version="4.3.0" /> | ||
| <PackageReference Include="System.Reflection.Extensions" Version="4.3.0" /> | ||
| <PackageReference Include="System.Reflection.TypeExtensions" Version="4.3.0" /> | ||
| </ItemGroup> | ||
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| </Project> |
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| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Reflection; | ||
| using System.Runtime.Serialization; | ||
| using Newtonsoft.Json; | ||
| using Newtonsoft.Json.Linq; | ||
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| namespace RestEaseClientGeneratorConsoleApp | ||
| { | ||
| public class AnyOfJsonConverter : JsonConverter | ||
| { | ||
| public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) | ||
| { | ||
| if (value == null) | ||
| { | ||
| if (serializer.NullValueHandling == NullValueHandling.Include) | ||
| { | ||
| serializer.Serialize(writer, value); | ||
| } | ||
| return; | ||
| } | ||
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| var currentValue = GetPropertyValue(value, "CurrentValue"); | ||
| serializer.Serialize(writer, currentValue); | ||
| } | ||
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| /// <summary> | ||
| /// See | ||
| /// - https://stackoverflow.com/questions/8030538/how-to-implement-custom-jsonconverter-in-json-net | ||
| /// - https://stackoverflow.com/a/59286262/255966 | ||
| /// </summary> | ||
| public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) | ||
| { | ||
| var jObject = JObject.Load(reader); | ||
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| Type mostSuitableType = null; | ||
| int countOfMaxMatchingProperties = -1; | ||
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| // Take the names of elements from json data | ||
| var jObjectKeys = GetKeys(jObject); | ||
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| // Take the public properties of the parent class | ||
| var objectTypeProps = objectType.GetProperties(BindingFlags.Instance | BindingFlags.Public) | ||
| .Select(p => p.Name).ToHashSet(); | ||
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| // Trying to find the right "KnownType" | ||
| foreach (var knownType in GetPropertyValue<Type[]>(existingValue, "Types")) | ||
| { | ||
| // Select properties of the inheritor, except properties from the parent class and properties with "ignore" attributes | ||
| var notIgnoreProps = knownType.GetProperties(BindingFlags.Instance | BindingFlags.Public) | ||
| .Where(p => !objectTypeProps.Contains(p.Name) && p.CustomAttributes.All(a => a.AttributeType != typeof(JsonIgnoreAttribute))); | ||
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| // Get serializable property names | ||
| var jsonNameFields = notIgnoreProps.Select(prop => | ||
| { | ||
| string jsonFieldName = null; | ||
| var jsonPropertyAttribute = prop.CustomAttributes.FirstOrDefault(a => a.AttributeType == typeof(JsonPropertyAttribute)); | ||
| if (jsonPropertyAttribute != null) | ||
| { | ||
| // Take the name of the json element from the attribute constructor | ||
| int constructorArgumentsCount = jsonPropertyAttribute.ConstructorArguments.Count; | ||
| if (constructorArgumentsCount > 0) | ||
| { | ||
| var argument = jsonPropertyAttribute.ConstructorArguments.First(); | ||
| if (argument.ArgumentType == typeof(string) && !string.IsNullOrEmpty(argument.Value as string)) | ||
| { | ||
| jsonFieldName = (string)argument.Value; | ||
| } | ||
| } | ||
| } | ||
| // Otherwise, take the name of the property | ||
| if (string.IsNullOrEmpty(jsonFieldName)) | ||
| { | ||
| jsonFieldName = prop.Name; | ||
| } | ||
| return jsonFieldName; | ||
| }); | ||
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| var jKnownTypeKeys = new HashSet<string>(jsonNameFields); | ||
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| // By intersecting the sets of names we determine the most suitable inheritor | ||
| int count = jObjectKeys.Intersect(jKnownTypeKeys).Count(); | ||
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| if (count == jKnownTypeKeys.Count) | ||
| { | ||
| mostSuitableType = knownType; | ||
| break; | ||
| } | ||
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| if (count > countOfMaxMatchingProperties) | ||
| { | ||
| countOfMaxMatchingProperties = count; | ||
| mostSuitableType = knownType; | ||
| } | ||
| } | ||
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| if (mostSuitableType != null) | ||
| { | ||
| object target = Activator.CreateInstance(mostSuitableType); | ||
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| using (JsonReader jObjectReader = CopyReaderForObject(reader, jObject)) | ||
| { | ||
| serializer.Populate(jObjectReader, target); | ||
| } | ||
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| return Activator.CreateInstance(objectType, target); | ||
| } | ||
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| throw new SerializationException($"Could not deserialize {objectType}, no suitable type found."); | ||
| } | ||
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| public override bool CanConvert(Type objectType) | ||
| { | ||
| return objectType.FullName.StartsWith("AnyOfTypes.AnyOf`"); | ||
| } | ||
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| private HashSet<string> GetKeys(JObject obj) | ||
| { | ||
| return new HashSet<string>(((IEnumerable<KeyValuePair<string, JToken>>)obj).Select(k => k.Key)); | ||
| } | ||
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| private static JsonReader CopyReaderForObject(JsonReader reader, JObject jObject) | ||
| { | ||
| var jObjectReader = jObject.CreateReader(); | ||
| jObjectReader.CloseInput = reader.CloseInput; | ||
| jObjectReader.Culture = reader.Culture; | ||
| jObjectReader.DateFormatString = reader.DateFormatString; | ||
| jObjectReader.DateParseHandling = reader.DateParseHandling; | ||
| jObjectReader.DateTimeZoneHandling = reader.DateTimeZoneHandling; | ||
| jObjectReader.FloatParseHandling = reader.FloatParseHandling; | ||
| jObjectReader.MaxDepth = reader.MaxDepth; | ||
| jObjectReader.SupportMultipleContent = reader.SupportMultipleContent; | ||
| return jObjectReader; | ||
| } | ||
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| private static T GetPropertyValue<T>(object value, string name) | ||
| { | ||
| return (T)GetPropertyValue(value, name); | ||
| } | ||
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| private static object GetPropertyValue(object value, string name) | ||
| { | ||
| return value.GetType().GetProperty(name).GetValue(value); | ||
| } | ||
| } | ||
| } |
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| @@ -0,0 +1,14 @@ | ||
| #if !NETSTANDARD2_1_OR_GREATER | ||
| using System.Collections.Generic; | ||
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| namespace System.Linq | ||
| { | ||
| internal static class LinqExtensions | ||
| { | ||
| public static HashSet<T> ToHashSet<T>(this IEnumerable<T> source, IEqualityComparer<T> comparer = null) | ||
| { | ||
| return new HashSet<T>(source, comparer); | ||
| } | ||
| } | ||
| } | ||
| #endif |