Newtonsoft.Json/JsonObjectAttribute.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

using System;

namespace Newtonsoft.Json
{
    /// <summary>
    /// Instructs the <see cref="JsonSerializer"/> how to serialize the object.
    /// </summary>
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Interface, AllowMultiple = false)]
    public sealed class JsonObjectAttribute : JsonContainerAttribute
    {
        private MemberSerialization _memberSerialization = MemberSerialization.OptOut;

        // yuck. can't set nullable properties on an attribute in C#
        // have to use this approach to get an unset default state
        internal Required? _itemRequired;

        /// <summary>
        /// Gets or sets the member serialization.
        /// </summary>
        /// <value>The member serialization.</value>
        public MemberSerialization MemberSerialization
        {
            get { return _memberSerialization; }
            set { _memberSerialization = value; }
        }

        /// <summary>
        /// Gets or sets a value that indicates whether the object's properties are required.
        /// </summary>
        /// <value>
        /// 	A value indicating whether the object's properties are required.
        /// </value>
        public Required ItemRequired
        {
            get { return _itemRequired ?? default(Required); }