Newtonsoft.Json/Bson/BsonToken.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.Collections;
using System.Collections.Generic;

namespace Newtonsoft.Json.Bson
{
    internal abstract class BsonToken
    {
        public abstract BsonType Type { get; }
        public BsonToken Parent { get; set; }
        public int CalculatedSize { get; set; }
    }

    internal class BsonObject : BsonToken, IEnumerable<BsonProperty>
    {
        private readonly List<BsonProperty> _children = new List<BsonProperty>();

        public void Add(string name, BsonToken token)
        {
            _children.Add(new BsonProperty { Name = new BsonString(name, false), Value = token });
            token.Parent = this;
        }

        public override BsonType Type
        {
            get { return BsonType.Object; }
        }

        public IEnumerator<BsonProperty> GetEnumerator()
        {
            return _children.GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();