StackOrQueueConverter<TCollection>
class StackOrQueueConverter<TCollection> : JsonCollectionConverter<TCollection, object> where TCollection : IEnumerable
using System.Collections;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text.Json.Serialization.Metadata;
namespace System.Text.Json.Serialization.Converters
{
internal class StackOrQueueConverter<TCollection> : JsonCollectionConverter<TCollection, object> where TCollection : IEnumerable
{
internal override bool CanPopulate => true;
protected sealed override void Add([In] [IsReadOnly] object value, ref ReadStack state)
{
Action<TCollection, object> action = (Action<TCollection, object>)state.Current.JsonTypeInfo.AddMethodDelegate;
action((TCollection)state.Current.ReturnValue, value);
}
protected sealed override void CreateCollection(ref Utf8JsonReader reader, [System.Runtime.CompilerServices.ScopedRef] ref ReadStack state, JsonSerializerOptions options)
{
if (!(state.ParentProperty?.TryGetPrePopulatedValue(ref state) ?? false)) {
JsonTypeInfo jsonTypeInfo = state.Current.JsonTypeInfo;
Func<object> createObject = jsonTypeInfo.CreateObject;
if (createObject == null)
ThrowHelper.ThrowNotSupportedException_CannotPopulateCollection(TypeToConvert, ref reader, ref state);
state.Current.ReturnValue = createObject();
}
}
protected sealed override bool OnWriteResume(Utf8JsonWriter writer, TCollection value, JsonSerializerOptions options, ref WriteStack state)
{
IEnumerator enumerator;
if (state.Current.CollectionEnumerator == null) {
enumerator = value.GetEnumerator();
if (!enumerator.MoveNext())
return true;
} else
enumerator = state.Current.CollectionEnumerator;
JsonConverter<object> elementConverter = JsonCollectionConverter<TCollection, object>.GetElementConverter(ref state);
do {
if (JsonConverter.ShouldFlush(writer, ref state)) {
state.Current.CollectionEnumerator = enumerator;
return false;
}
object value2 = enumerator.Current;
if (!elementConverter.TryWrite(writer, ref value2, options, ref state)) {
state.Current.CollectionEnumerator = enumerator;
return false;
}
state.Current.EndCollectionElement();
} while (enumerator.MoveNext());
return true;
}
}
}