JsonNodeConverter
using System.Text.Json.Nodes;
using System.Text.Json.Serialization.Metadata;
namespace System.Text.Json.Serialization.Converters
{
internal sealed class JsonNodeConverter : JsonConverter<JsonNode>
{
private static JsonNodeConverter s_nodeConverter;
private static JsonArrayConverter s_arrayConverter;
private static JsonObjectConverter s_objectConverter;
private static JsonValueConverter s_valueConverter;
public static JsonNodeConverter Instance => s_nodeConverter ?? (s_nodeConverter = new JsonNodeConverter());
public static JsonArrayConverter ArrayConverter => s_arrayConverter ?? (s_arrayConverter = new JsonArrayConverter());
public static JsonObjectConverter ObjectConverter => s_objectConverter ?? (s_objectConverter = new JsonObjectConverter());
public static JsonValueConverter ValueConverter => s_valueConverter ?? (s_valueConverter = new JsonValueConverter());
public override void Write(Utf8JsonWriter writer, JsonNode value, JsonSerializerOptions options)
{
if (value == null)
writer.WriteNullValue();
else {
JsonValue jsonValue = value as JsonValue;
if (jsonValue != null)
ValueConverter.Write(writer, jsonValue, options);
else {
JsonObject jsonObject = value as JsonObject;
if (jsonObject != null)
ObjectConverter.Write(writer, jsonObject, options);
else
ArrayConverter.Write(writer, (JsonArray)value, options);
}
}
}
public override JsonNode Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
switch (reader.TokenType) {
case JsonTokenType.String:
case JsonTokenType.Number:
case JsonTokenType.True:
case JsonTokenType.False:
return ValueConverter.Read(ref reader, typeToConvert, options);
case JsonTokenType.StartObject:
return ObjectConverter.Read(ref reader, typeToConvert, options);
case JsonTokenType.StartArray:
return ArrayConverter.Read(ref reader, typeToConvert, options);
default:
throw new JsonException();
}
}
public static JsonNode Create(JsonElement element, JsonNodeOptions? options)
{
switch (element.ValueKind) {
case JsonValueKind.Null:
return null;
case JsonValueKind.Object:
return new JsonObject(element, options);
case JsonValueKind.Array:
return new JsonArray(element, options);
default:
return new JsonValueTrimmable<JsonElement>(element, JsonMetadataServices.JsonElementConverter, options);
}
}
}
}