79 lines
2.5 KiB
C#
79 lines
2.5 KiB
C#
//
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// QueryConcatNode.cs
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//
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// Author:
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// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
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//
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// Copyright (c) 2010 Jérémie "Garuma" Laval
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if NET_4_0
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using System;
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using System.Threading;
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using System.Collections;
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using System.Collections.Generic;
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namespace System.Linq.Parallel.QueryNodes
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{
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internal class QueryConcatNode<TSource> : QueryMuxNode<TSource, TSource, TSource>
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{
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public QueryConcatNode (QueryBaseNode<TSource> first, QueryBaseNode<TSource> second)
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: base (first, second)
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{
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}
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internal override IList<IEnumerable<TSource>> GetEnumerables (QueryOptions options)
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{
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var second = Second.GetEnumerables (options);
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return Parent.GetEnumerables (options)
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.Select ((f, i) => CombineEnumerables (f, second[i]))
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.ToList ();
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}
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internal override IList<IEnumerable<KeyValuePair<long, TSource>>> GetOrderedEnumerables (QueryOptions options)
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{
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var second = Second.GetOrderedEnumerables (options);
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return Parent.GetOrderedEnumerables (options)
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.Select ((f, i) => CombineEnumerables (f, second[i]))
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.ToList ();
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}
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internal override IEnumerable<TSource> GetSequential ()
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{
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IEnumerable<TSource> first = Parent.GetSequential ();
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IEnumerable<TSource> second = Second.GetSequential ();
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return first.Concat (second);
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}
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IEnumerable<TResult> CombineEnumerables<TResult> (IEnumerable<TResult> f, IEnumerable<TResult> s)
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{
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foreach (var e in f)
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yield return e;
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foreach (var e in s)
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yield return e;
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}
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}
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}
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#endif
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