a575963da9
Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14
68 lines
2.3 KiB
C#
68 lines
2.3 KiB
C#
//
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// QueryReverseNode.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.Linq;
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using System.Threading;
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using System.Collections.Generic;
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using System.Collections.Concurrent;
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namespace System.Linq.Parallel.QueryNodes
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{
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internal class QueryReverseNode<TSource> : QueryStreamNode<TSource, TSource>
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{
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ParallelQuery<TSource> source;
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public QueryReverseNode (ParallelQuery<TSource> source)
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: base (source.Node, false)
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{
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this.source = source;
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}
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internal override IEnumerable<TSource> GetSequential ()
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{
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return Parent.GetSequential ().Reverse ();
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}
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// As stated in the doc, in this case we do nothing
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internal override IList<IEnumerable<TSource>> GetEnumerables (QueryOptions options)
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{
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return Parent.GetEnumerables (options);
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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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ReverseList<TSource> reversed = new ReverseList<TSource> (source.ToListOrdered ());
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OrderablePartitioner<TSource> partitioner = ParallelPartitioner.CreateForStrips (reversed, 1);
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return WrapHelper.Wrap (partitioner.GetOrderablePartitions (options.PartitionCount));
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}
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}
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}
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#endif
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