ListOfTConverter<TCollection, TElement>
sealed class ListOfTConverter<TCollection, TElement> : IEnumerableDefaultConverter<TCollection, TElement> where TCollection : List<TElement>
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace System.Text.Json.Serialization.Converters
{
internal sealed class ListOfTConverter<TCollection, TElement> : IEnumerableDefaultConverter<TCollection, TElement> where TCollection : List<TElement>
{
internal override bool CanPopulate => true;
protected override void Add([In] [System.Runtime.CompilerServices.IsReadOnly] TElement value, ref ReadStack state)
{
((TCollection)state.Current.ReturnValue).Add(value);
}
protected override void CreateCollection(ref Utf8JsonReader reader, [System.Runtime.CompilerServices.ScopedRef] ref ReadStack state, JsonSerializerOptions options)
{
if (!(state.ParentProperty?.TryGetPrePopulatedValue(ref state) ?? false)) {
if (state.Current.JsonTypeInfo.CreateObject == null)
ThrowHelper.ThrowNotSupportedException_SerializationNotSupported(state.Current.JsonTypeInfo.Type);
state.Current.ReturnValue = state.Current.JsonTypeInfo.CreateObject();
}
}
protected override bool OnWriteResume(Utf8JsonWriter writer, TCollection value, JsonSerializerOptions options, ref WriteStack state)
{
List<TElement> list = value;
int i = state.Current.EnumeratorIndex;
JsonConverter<TElement> elementConverter = JsonCollectionConverter<TCollection, TElement>.GetElementConverter(ref state);
if (!elementConverter.CanUseDirectReadOrWrite || state.Current.NumberHandling.HasValue) {
for (; i < list.Count; i++) {
TElement value2 = list[i];
if (!elementConverter.TryWrite(writer, ref value2, options, ref state)) {
state.Current.EnumeratorIndex = i;
return false;
}
state.Current.EndCollectionElement();
if (JsonConverter.ShouldFlush(ref state, writer)) {
i = (state.Current.EnumeratorIndex = i + 1);
return false;
}
}
} else {
for (; i < list.Count; i++) {
elementConverter.Write(writer, list[i], options);
}
}
return true;
}
}
}