75 lines
2.6 KiB
C#
75 lines
2.6 KiB
C#
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//
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// OrderedSequence.cs
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//
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// Authors:
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// Alejandro Serrano "Serras" (trupill@yahoo.es)
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// Marek Safar <marek.safar@gmail.com>
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// Jb Evain <jbevain@novell.com>
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//
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// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace System.Linq {
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class OrderedSequence<TElement, TKey> : OrderedEnumerable<TElement> {
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OrderedEnumerable<TElement> parent;
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Func<TElement, TKey> selector;
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IComparer<TKey> comparer;
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SortDirection direction;
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internal OrderedSequence (IEnumerable<TElement> source, Func<TElement, TKey> key_selector, IComparer<TKey> comparer, SortDirection direction)
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: base (source)
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{
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this.selector = key_selector;
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this.comparer = comparer ?? Comparer<TKey>.Default;
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this.direction = direction;
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}
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internal OrderedSequence (OrderedEnumerable<TElement> parent, IEnumerable<TElement> source, Func<TElement, TKey> keySelector, IComparer<TKey> comparer, SortDirection direction)
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: this (source, keySelector, comparer, direction)
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{
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this.parent = parent;
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}
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public override SortContext<TElement> CreateContext (SortContext<TElement> current)
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{
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SortContext<TElement> context = new SortSequenceContext<TElement, TKey> (selector, comparer, direction, current);
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if (parent != null)
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return parent.CreateContext (context);
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return context;
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}
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protected override IEnumerable<TElement> Sort (IEnumerable<TElement> source)
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{
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return QuickSort<TElement>.Sort (source, CreateContext (null));
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}
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}
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}
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