ClassLibraryWeiBao/json引擎2/Serialization/LateBoundMetadataTypeAttribute.cs

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#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

#if !SILVERLIGHT && !NET20 && !NETFX_CORE
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json.Utilities;
using System.Reflection;

namespace Newtonsoft.Json.Serialization
{
  internal class LateBoundMetadataTypeAttribute : IMetadataTypeAttribute
  {
    private static PropertyInfo _metadataClassTypeProperty;

    private readonly object _attribute;

    public LateBoundMetadataTypeAttribute(object attribute)
    {
      _attribute = attribute;
    }

    public Type MetadataClassType
    {
      get
      {
        if (_metadataClassTypeProperty == null)
          _metadataClassTypeProperty = _attribute.GetType().GetProperty("MetadataClassType");

        return (Type)ReflectionUtils.GetMemberValue(_metadataClassTypeProperty, _attribute);
      }
    }
  }
}
#endif