HybridObjectCache.cs

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using System.Collections.Generic;
 
namespace System.Runtime.Serialization;
 
internal sealed class HybridObjectCache
{
    private Dictionary<string, object> _objectDictionary;
 
    private Dictionary<string, object> _referencedObjectDictionary;
 
    internal HybridObjectCache()
    {
    }
 
    internal void Add(string id, object obj)
    {
        if (_objectDictionary == null)
        {
            _objectDictionary = new Dictionary<string, object>();
        }
        if (_objectDictionary.TryGetValue(id, out var _))
        {
            throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(System.SR.Format(System.SR.MultipleIdDefinition, id)));
        }
        _objectDictionary.Add(id, obj);
    }
 
    internal void Remove(string id)
    {
        if (_objectDictionary != null)
        {
            _objectDictionary.Remove(id);
        }
    }
 
    internal object GetObject(string id)
    {
        if (_referencedObjectDictionary == null)
        {
            _referencedObjectDictionary = new Dictionary<string, object>();
            _referencedObjectDictionary.Add(id, null);
        }
        else
        {
            _referencedObjectDictionary.TryAdd(id, null);
        }
        if (_objectDictionary != null)
        {
            _objectDictionary.TryGetValue(id, out var value);
            return value;
        }
        return null;
    }
 
    internal bool IsObjectReferenced(string id)
    {
        if (_referencedObjectDictionary != null)
        {
            return _referencedObjectDictionary.ContainsKey(id);
        }
        return false;
    }
}