Newtonsoft.Json/Linq/JTokenReader.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;
using Newtonsoft.Json.Utilities;

namespace Newtonsoft.Json.Linq
{
    /// <summary>
    /// Represents a reader that provides fast, non-cached, forward-only access to serialized Json data.
    /// </summary>
    public class JTokenReader : JsonReader, IJsonLineInfo
    {
        private readonly string _initialPath;
        private readonly JToken _root;
        private JToken _parent;
        internal JToken _current;

        /// <summary>
        /// Initializes a new instance of the <see cref="JTokenReader"/> class.
        /// </summary>
        /// <param name="token">The token to read from.</param>
        public JTokenReader(JToken token)
        {
            ValidationUtils.ArgumentNotNull(token, "token");

            _root = token;
            _current = token;
        }

        internal JTokenReader(JToken token, string initialPath)
            : this(token)
        {
            _initialPath = initialPath;
        }

        /// <summary>
        /// Reads the next JSON token from the stream as a <see cref="T:Byte[]"/>.