mono/mcs/class/System.Core/System.Linq/Internal/QueryNodes/QueryCastNode.cs

#if NET_4_0
//
// QueryCastNode.cs
//
// Author:
//       Jérémie "Garuma" Laval <[email protected]>
//
// Copyright (c) 2010 Jérémie "Garuma" Laval
//
// 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.

using System;
using System.Threading;
using System.Threading.Tasks;
using System.Collections.Generic;

namespace System.Linq
{
	internal class QueryCastNode<T> : QueryStreamNode<object, T>
	{
		public QueryCastNode (QueryBaseNode<T> source)
			: base (source, false)
		{

		}
		
		internal override IEnumerable<object> GetSequential ()
		{
			return Parent.GetSequential ().Cast<object> ();
		}
		
		internal override IList<IEnumerable<KeyValuePair<long, object>>> GetOrderedEnumerables (QueryOptions options)
		{
			IList<IEnumerable<KeyValuePair<long, T>>> src = Parent.GetOrderedEnumerables (options);
			IEnumerable<KeyValuePair<long, object>>[] result = new IEnumerable<KeyValuePair<long, object>> [src.Count];
			
			for (int i = 0; i < src.Count; i++)
				result[i] = src[i].Select ((e) => new KeyValuePair<long, object> (e.Key, (object)e.Value));
			
			return result;
		}
		
		internal override IList<IEnumerable<object>> GetEnumerables (QueryOptions options)
		{
			IList<IEnumerable<T>> src = Parent.GetEnumerables (options);
			IEnumerable<object>[] result = new IEnumerable<object> [src.Count];
			
			for (int i = 0; i < src.Count; i++)
				result[i] = src[i].Cast<object> ();
			
			return result;
		}
	}
}

#endif