101 lines
3.6 KiB
C#
101 lines
3.6 KiB
C#
using Salmon.Core;
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using System.Diagnostics;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace Salmon.Web;
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public class TripletJsonConverter
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: JsonConverter<Triplet>
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{
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public override Triplet? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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Debug.Assert(reader.TokenType == JsonTokenType.StartObject);
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Triplet ret = new ();
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while (reader.Read())
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{
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if (reader.TokenType == JsonTokenType.EndObject)
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break;
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Debug.Assert(reader.TokenType == JsonTokenType.PropertyName);
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string jsonkey = reader.GetString();
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Debug.Assert(reader.Read());
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if(jsonkey == nameof(Triplet.key))
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{
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Debug.Assert(reader.TokenType == JsonTokenType.String);
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ret.key = reader.GetString();
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}
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else if (jsonkey == nameof(Triplet.predicate))
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{
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Debug.Assert(reader.TokenType == JsonTokenType.String);
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ret.predicate = reader.GetString();
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}
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else if(jsonkey.ToLower() == nameof(Triplet.LastFlush).ToLower())
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{
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Debug.Assert(reader.TokenType == JsonTokenType.String);
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ret.LastFlush = reader.GetDateTime();
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}
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else if (jsonkey == nameof(Triplet.value))
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{
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if (reader.TokenType == JsonTokenType.Null)
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ret.value = null;
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else if (reader.TokenType == JsonTokenType.False)
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ret.value = false;
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else if (reader.TokenType == JsonTokenType.True)
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ret.value = true;
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else if (reader.TokenType == JsonTokenType.String)
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ret.value = reader.GetString();
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else if (reader.TokenType == JsonTokenType.Number)
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ret.value = reader.GetDouble();
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else
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throw new NotImplementedException($"Cannot read Triple.value from token type {reader.TokenType}.");
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}
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else
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Console.WriteLine($"Unknown triplet field {jsonkey} with token type {reader.TokenType}.");
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}
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return ret;
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}
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public override void Write(Utf8JsonWriter writer, Triplet value, JsonSerializerOptions options)
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{
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writer.WriteStartObject();
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writer.WriteString(nameof(Triplet.key), value.key);
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writer.WriteString(nameof(Triplet.predicate), value.predicate);
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writer.WritePropertyName(nameof(Triplet.LastFlush));
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writer.WriteStringValue(value.LastFlush);
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writer.WritePropertyName(nameof(Triplet.value));
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object? tval = value.value;
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if (tval is null)
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writer.WriteNullValue();
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else if (tval is bool)
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writer.WriteBooleanValue((bool)tval);
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else if (tval is string)
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writer.WriteStringValue((string)tval);
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else if (tval is int)
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writer.WriteNumberValue((int)tval);
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else if (tval is long)
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writer.WriteNumberValue((long)tval);
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else if (tval is uint)
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writer.WriteNumberValue((uint)tval);
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else if (tval is ulong)
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writer.WriteNumberValue((ulong)tval);
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else if (tval is float)
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writer.WriteNumberValue((float)tval);
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else if (tval is double)
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writer.WriteNumberValue((double)tval);
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else if (tval is DateTime)
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writer.WriteStringValue((DateTime)tval);
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else
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throw new NotImplementedException($"Cannot serialize type {tval.GetType()}.");
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writer.WriteEndObject();
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}
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}
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