mcs/class/corlib/System.Collections.Concurrent/Partitioner.cs

   1 //
   2 // Partitioner.cs
   3 //
   4 // Author:
   5 //       Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
   6 //
   7 // Copyright (c) 2009 Jérémie "Garuma" Laval
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining a copy
  10 // of this software and associated documentation files (the "Software"), to deal
  11 // in the Software without restriction, including without limitation the rights
  12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13 // copies of the Software, and to permit persons to whom the Software is
  14 // furnished to do so, subject to the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25 // THE SOFTWARE.
  26
  27 using System;
  28 using System.Collections.Generic;
  29
  30 #if NET_4_0 || BOOTSTRAP_NET_4_0
  31
  32 namespace System.Collections.Concurrent
  33 {
  34         public static class Partitioner
  35         {
  36                 public static OrderablePartitioner<TSource> Create<TSource> (IEnumerable<TSource> source)
  37                 {
  38                         IList<TSource> tempIList = source as IList<TSource>;
  39                         if (tempIList != null)
  40                                 return Create (tempIList, true);
  41
  42                         return new EnumerablePartitioner<TSource> (source);
  43                 }
  44
  45                 public static OrderablePartitioner<TSource> Create<TSource> (TSource[] source, bool loadBalance)
  46                 {
  47                         return Create ((IList<TSource>)source, loadBalance);
  48                 }
  49
  50                 public static OrderablePartitioner<TSource> Create<TSource> (IList<TSource> source, bool loadBalance)
  51                 {
  52                         return new ListPartitioner<TSource> (source);
  53                 }
  54
  55                 [MonoTODO("What range size is supposed to be in context and what the result returned looks like")]
  56                 public static OrderablePartitioner<Tuple<int, int>> Create (int fromInclusive,
  57                                                                              int toExclusive)
  58                 {
  59                         return Create (fromInclusive, toExclusive, 1);
  60                 }
  61
  62                 [MonoTODO("What range size is supposed to be in context and what the result returned looks like")]
  63                 public static OrderablePartitioner<Tuple<int, int>> Create (int fromInclusive,
  64                                                                              int toExclusive,
  65                                                                              int rangeSize)
  66                 {
  67                         throw new NotImplementedException ();
  68                 }
  69
  70                 [MonoTODO("What range size is supposed to be in context and what the result returned looks like")]
  71                 public static OrderablePartitioner<Tuple<long, long>> Create (long fromInclusive,
  72                                                                                long toExclusive)
  73                 {
  74                         return Create (fromInclusive, toExclusive, 1);
  75                 }
  76
  77                 [MonoTODO("What range size is supposed to be in context and what the result returned looks like")]
  78                 public static OrderablePartitioner<Tuple<long, long>> Create (long fromInclusive,
  79                                                                                long toExclusive,
  80                                                                                long rangeSize)
  81                 {
  82                         throw new NotImplementedException ();
  83                 }
  84         }
  85
  86         public abstract class Partitioner<TSource>
  87         {
  88                 protected Partitioner ()
  89                 {
  90
  91                 }
  92
  93                 public virtual IEnumerable<TSource> GetDynamicPartitions ()
  94                 {
  95                         if (!SupportsDynamicPartitions)
  96                                 throw new NotSupportedException ();
  97
  98                         return null;
  99                 }
 100
 101                 public abstract IList<IEnumerator<TSource>> GetPartitions (int partitionCount);
 102
 103                 public virtual bool SupportsDynamicPartitions {
 104                         get {
 105                                 return false;
 106                         }
 107                 }
 108         }
 109 }
 110 #endif