Src/Newtonsoft.Json/Linq/Extensions.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 System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json.Utilities;
using System.Collections;
using System.Globalization;

namespace Newtonsoft.Json.Linq
{
  /// <summary>
  /// Contains the LINQ to JSON extension methods.
  /// </summary>
  public static class Extensions
  {
    /// <summary>
    /// Returns a collection of tokens that contains the ancestors of every token in the source collection.
    /// </summary>
    /// <typeparam name="T">The type of the objects in source, constrained to <see cref="JToken"/>.</typeparam>
    /// <param name="source">An <see cref="IEnumerable{T}"/> of <see cref="JToken"/> that contains the source collection.</param>
    /// <returns>An <see cref="IEnumerable{T}"/> of <see cref="JToken"/> that contains the ancestors of every node in the source collection.</returns>
    public static IJEnumerable<JToken> Ancestors<T>(this IEnumerable<T> source) where T : JToken
    {
      ValidationUtils.ArgumentNotNull(source, "source");

      return source.SelectMany(j => j.Ancestors()).AsJEnumerable();
    }

    //TODO
    //public static IEnumerable<JObject> AncestorsAndSelf<T>(this IEnumerable<T> source) where T : JObject
    //{
    //  ValidationUtils.ArgumentNotNull(source, "source");

    //  return source.SelectMany(j => j.AncestorsAndSelf());
    //}