mcs/class/System.Data.DataSetExtensions/System.Data/EnumerableRowCollectionExtensions.cs

   1 //
   2 // EnumerableRowCollectionExtensions.cs
   3 //
   4 // Author:
   5 //   Atsushi Enomoto  <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc. http://www.novell.com
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Collections.Generic;
  33 using System.Linq;
  34
  35 namespace System.Data
  36 {
  37         public static class EnumerableRowCollectionExtensions
  38         {
  39                 public static EnumerableRowCollection<TResult> Cast<TResult> (this EnumerableRowCollection source)
  40                 {
  41                         return new EnumerableRowCollection<TResult> (Enumerable.Cast<TResult> (source));
  42                 }
  43
  44                 public static OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey> (this EnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector)
  45                 {
  46                         return OrderBy<TRow, TKey> (source, keySelector, Comparer<TKey>.Default);
  47                 }
  48
  49                 public static OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey> (this EnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer)
  50                 {
  51                         return OrderedEnumerableRowCollection<TRow>.Create<TRow, TKey> (source, keySelector, comparer, false);
  52                 }
  53
  54                 public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey> (this EnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector)
  55                 {
  56                         return OrderByDescending<TRow, TKey> (source, keySelector, Comparer<TKey>.Default);
  57                 }
  58
  59                 public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey> (this EnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer)
  60                 {
  61                         return OrderedEnumerableRowCollection<TRow>.Create<TRow, TKey> (source, keySelector, comparer, true);
  62                 }
  63
  64                 public static EnumerableRowCollection<S> Select<TRow, S> (this EnumerableRowCollection<TRow> source, Func<TRow, S> selector)
  65                 {
  66                         return new EnumerableRowCollection<S> (Enumerable.Select<TRow, S> (source, selector));
  67                 }
  68
  69                 public static OrderedEnumerableRowCollection<TRow> ThenBy<TRow, TKey> (this OrderedEnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector)
  70                 {
  71                         return ThenBy<TRow, TKey> (source, keySelector, Comparer<TKey>.Default);
  72                 }
  73
  74                 public static OrderedEnumerableRowCollection<TRow> ThenBy<TRow, TKey> (this OrderedEnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer)
  75                 {
  76                         return OrderedEnumerableRowCollection<TRow>.AddSort<TRow, TKey> (source, keySelector, comparer, false);
  77                 }
  78
  79                 public static OrderedEnumerableRowCollection<TRow> ThenByDescending<TRow, TKey> (this OrderedEnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector)
  80                 {
  81                         return ThenByDescending<TRow, TKey> (source, keySelector, Comparer<TKey>.Default);
  82                 }
  83
  84                 public static OrderedEnumerableRowCollection<TRow> ThenByDescending<TRow, TKey> (this OrderedEnumerableRowCollection<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer)
  85                 {
  86                         return OrderedEnumerableRowCollection<TRow>.AddSort<TRow, TKey> (source, keySelector, comparer, true);
  87                 }
  88
  89                 public static EnumerableRowCollection<TRow> Where<TRow> (this EnumerableRowCollection<TRow> source, Func<TRow, bool> predicate)
  90                 {
  91                         return new EnumerableRowCollection<TRow> (Enumerable.Where<TRow> (source, predicate));
  92                 }
  93         }
  94 }