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Root/src/Content/ContentReaders/NullableReader.cs

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#region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
 * Copyright 2009-2016 Ethan Lee and the MonoGame Team
 *
 * Released under the Microsoft Public License.
 * See LICENSE for details.
 */
#endregion
 
#region Using Statements
using System;
#endregion
 
namespace Microsoft.Xna.Framework.Content
{
    internal class NullableReader<T> : ContentTypeReader<T?> where T : struct
    {
        #region Private ContentTypeReader Instance
 
        ContentTypeReader elementReader;
 
        #endregion
 
        #region Internal Constructor
 
        internal NullableReader()
        {
        }
 
        #endregion
 
        #region Protected Initialization Method
 
        protected internal override void Initialize(ContentTypeReaderManager manager)
        {
            Type readerType = typeof(T);
            elementReader = manager.GetTypeReader(readerType);
        }
 
        #endregion
 
        #region Protected Read Method
 
        protected internal override T? Read(ContentReader input, T? existingInstance)
        {
            if (input.ReadBoolean())
            {
                return input.ReadObject<T>(elementReader);
            }
            return null;
        }
 
        #endregion
    }
}

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