IgnoreReferenceResolver.cs

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using System.Collections.Generic;
 
namespace System.Text.Json.Serialization;
 
internal sealed class IgnoreReferenceResolver : ReferenceResolver
{
    private Stack<ReferenceEqualsWrapper> _stackForCycleDetection;
 
    internal override void PopReferenceForCycleDetection()
    {
        _stackForCycleDetection.Pop();
    }
 
    internal override bool ContainsReferenceForCycleDetection(object value)
    {
        return _stackForCycleDetection?.Contains(new ReferenceEqualsWrapper(value)) ?? false;
    }
 
    internal override void PushReferenceForCycleDetection(object value)
    {
        ReferenceEqualsWrapper item = new ReferenceEqualsWrapper(value);
        if (_stackForCycleDetection == null)
        {
            _stackForCycleDetection = new Stack<ReferenceEqualsWrapper>();
        }
        _stackForCycleDetection.Push(item);
    }
 
    public override void AddReference(string referenceId, object value)
    {
        throw new InvalidOperationException();
    }
 
    public override string GetReference(object value, out bool alreadyExists)
    {
        throw new InvalidOperationException();
    }
 
    public override object ResolveReference(string referenceId)
    {
        throw new InvalidOperationException();
    }
}