JsonParameterInfo.cs

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using System.Runtime.CompilerServices;
 
namespace System.Text.Json.Serialization.Metadata;
 
internal abstract class JsonParameterInfo
{
    private JsonTypeInfo _runtimeTypeInfo;
 
    [CompilerGenerated]
    private bool _003CMatchingPropertyCanBeNull_003Ek__BackingField;
 
    public JsonParameterInfoValues ClrInfo;
 
    public JsonConverter ConverterBase { get; private set; }
 
    private bool MatchingPropertyCanBeNull
    {
        [CompilerGenerated]
        set
        {
            _003CMatchingPropertyCanBeNull_003Ek__BackingField = value;
        }
    }
 
    public object DefaultValue { get; private protected set; }
 
    public bool IgnoreDefaultValuesOnRead { get; private set; }
 
    public JsonSerializerOptions Options { get; set; }
 
    public byte[] NameAsUtf8Bytes { get; private set; }
 
    public JsonNumberHandling? NumberHandling { get; private set; }
 
    public JsonTypeInfo RuntimeTypeInfo
    {
        get
        {
            if (_runtimeTypeInfo == null)
            {
                _runtimeTypeInfo = Options.GetOrAddClass(RuntimePropertyType);
            }
            return _runtimeTypeInfo;
        }
    }
 
    public Type RuntimePropertyType { get; set; }
 
    public bool ShouldDeserialize { get; private set; }
 
    public virtual void Initialize(JsonParameterInfoValues parameterInfo, JsonPropertyInfo matchingProperty, JsonSerializerOptions options)
    {
        ClrInfo = parameterInfo;
        Options = options;
        ShouldDeserialize = true;
        RuntimePropertyType = matchingProperty.RuntimePropertyType;
        NameAsUtf8Bytes = matchingProperty.NameAsUtf8Bytes;
        ConverterBase = matchingProperty.ConverterBase;
        IgnoreDefaultValuesOnRead = matchingProperty.IgnoreDefaultValuesOnRead;
        NumberHandling = matchingProperty.NumberHandling;
        MatchingPropertyCanBeNull = matchingProperty.PropertyTypeCanBeNull;
    }
 
    public static JsonParameterInfo CreateIgnoredParameterPlaceholder(JsonParameterInfoValues parameterInfo, JsonPropertyInfo matchingProperty, bool sourceGenMode)
    {
        JsonParameterInfo jsonParameterInfo = new JsonParameterInfo<sbyte>();
        jsonParameterInfo.ClrInfo = parameterInfo;
        jsonParameterInfo.RuntimePropertyType = matchingProperty.RuntimePropertyType;
        jsonParameterInfo.NameAsUtf8Bytes = matchingProperty.NameAsUtf8Bytes;
        if (sourceGenMode)
        {
            jsonParameterInfo.DefaultValue = matchingProperty.DefaultValue;
        }
        else
        {
            Type parameterType = parameterInfo.ParameterType;
            JsonTypeInfo jsonTypeInfo;
            GenericMethodHolder genericMethodHolder = ((!matchingProperty.Options.TryGetClass(parameterType, out jsonTypeInfo)) ? GenericMethodHolder.CreateHolder(parameterInfo.ParameterType) : jsonTypeInfo.GenericMethods);
            jsonParameterInfo.DefaultValue = genericMethodHolder.DefaultValue;
        }
        return jsonParameterInfo;
    }
}
internal sealed class JsonParameterInfo<T> : JsonParameterInfo
{
    public T TypedDefaultValue { get; private set; }
 
    public override void Initialize(JsonParameterInfoValues parameterInfo, JsonPropertyInfo matchingProperty, JsonSerializerOptions options)
    {
        base.Initialize(parameterInfo, matchingProperty, options);
        InitializeDefaultValue(matchingProperty);
    }
 
    private void InitializeDefaultValue(JsonPropertyInfo matchingProperty)
    {
        if (ClrInfo.HasDefaultValue)
        {
            object defaultValue = ClrInfo.DefaultValue;
            if (defaultValue == null && !matchingProperty.PropertyTypeCanBeNull)
            {
                base.DefaultValue = TypedDefaultValue;
                return;
            }
            base.DefaultValue = defaultValue;
            TypedDefaultValue = (T)defaultValue;
        }
        else
        {
            base.DefaultValue = TypedDefaultValue;
        }
    }
}