Merge pull request #228 from QuickJack/3e163743eda89cc8c239779a75dd245be12aee3c
[mono.git] / mcs / class / System.Data.DataSetExtensions / System.Data / TypedTableBaseExtensions.cs
1 //
2 // TypedTableBaseExtensions.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 TypedTableBaseExtensions
38         {
39
40                 public static EnumerableRowCollection<TRow> AsEnumerable<TRow> (this TypedTableBase<TRow> source) where TRow : DataRow
41                 {
42                         return new EnumerableRowCollection<TRow> (source);
43                 }
44
45                 public static OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey> (this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector)
46                         where TRow : DataRow
47                 {
48                         return OrderBy<TRow, TKey> (source, keySelector, Comparer<TKey>.Default);
49                 }
50
51                 public static OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey> (this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer)
52                         where TRow : DataRow
53                 {
54                         return OrderedEnumerableRowCollection<TRow>.Create<TRow, TKey> (source, keySelector, comparer, false);
55                 }
56
57                 public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey> (this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector)
58                         where TRow : DataRow
59                 {
60                         return OrderByDescending<TRow, TKey> (source, keySelector, Comparer<TKey>.Default);
61                 }
62
63                 public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey> (this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer)
64                         where TRow : DataRow
65                 {
66                         return OrderedEnumerableRowCollection<TRow>.Create<TRow, TKey> (source, keySelector, comparer, true);
67                 }
68
69                 public static EnumerableRowCollection<S> Select<TRow, S> (this TypedTableBase<TRow> source, Func<TRow, S> selector)
70                         where TRow : DataRow
71                 {
72                         return new EnumerableRowCollection<S> (Enumerable.Select<TRow, S> (source, selector));
73                 }
74
75                 public static EnumerableRowCollection<TRow> Where<TRow> (this TypedTableBase<TRow> source, Func<TRow, bool> predicate)
76                         where TRow : DataRow
77                 {
78                         return new EnumerableRowCollection<TRow> (Enumerable.Where<TRow> (source, predicate));
79                 }
80         }
81 }