using System.Reflection; using System.Runtime.CompilerServices; namespace System.Text.Json.Serialization.Metadata { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public abstract class JsonParameterInfo { private ICustomAttributeProvider _attributeProvider; public Type DeclaringType => MatchingProperty.DeclaringType; public int Position { get; } public Type ParameterType => MatchingProperty.PropertyType; public string Name { get; } public bool HasDefaultValue { get; } [System.Runtime.CompilerServices.Nullable(2)] public object DefaultValue { [System.Runtime.CompilerServices.NullableContext(2)] get; } [System.Runtime.CompilerServices.Nullable(2)] internal object EffectiveDefaultValue { get; set; } public bool IsNullable => MatchingProperty.IsSetNullable; public bool IsMemberInitializer { get; } [System.Runtime.CompilerServices.Nullable(2)] public ICustomAttributeProvider AttributeProvider { [System.Runtime.CompilerServices.NullableContext(2)] get { ICustomAttributeProvider customAttributeProvider = _attributeProvider; if (customAttributeProvider == null) { MethodBase methodBase = MatchingProperty.DeclaringTypeInfo.ConstructorAttributeProvider as MethodBase; if ((object)methodBase != null) { ParameterInfo[] parameters = methodBase.GetParameters(); if (Position < parameters.Length) customAttributeProvider = (_attributeProvider = parameters[Position]); } } return customAttributeProvider; } } internal JsonPropertyInfo MatchingProperty { get; } internal JsonConverter EffectiveConverter => MatchingProperty.EffectiveConverter; internal bool IgnoreNullTokensOnRead => MatchingProperty.IgnoreNullTokensOnRead; internal JsonSerializerOptions Options => MatchingProperty.Options; internal byte[] JsonNameAsUtf8Bytes => MatchingProperty.NameAsUtf8Bytes; internal JsonNumberHandling? NumberHandling => MatchingProperty.EffectiveNumberHandling; internal JsonTypeInfo JsonTypeInfo => MatchingProperty.JsonTypeInfo; internal bool ShouldDeserialize => !MatchingProperty.IsIgnored; internal bool IsRequiredParameter { get { if (!HasDefaultValue) return !IsMemberInitializer; return false; } } internal JsonParameterInfo(JsonParameterInfoValues parameterInfoValues, JsonPropertyInfo matchingProperty) { Position = parameterInfoValues.Position; Name = parameterInfoValues.Name; HasDefaultValue = parameterInfoValues.HasDefaultValue; DefaultValue = (parameterInfoValues.HasDefaultValue ? parameterInfoValues.DefaultValue : null); MatchingProperty = matchingProperty; IsMemberInitializer = parameterInfoValues.IsMemberInitializer; } } }