1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections;
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24 | using System.Collections.Generic;
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25 | using System.Collections.ObjectModel;
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26 | using System.Linq;
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27 | using System.Text;
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28 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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29 |
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30 | namespace HeuristicLab.Collections {
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31 | [Serializable]
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32 | public abstract class ObservableKeyedCollectionBase<TKey, TItem> : IObservableKeyedCollection<TKey, TItem> {
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33 | [Storable]
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34 | private Dictionary<TKey, TItem> dict;
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35 |
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36 | #region Properties
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37 | public int Count {
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38 | get { return dict.Count; }
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39 | }
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40 | public IEqualityComparer<TKey> Comparer {
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41 | get { return dict.Comparer; }
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42 | }
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43 | public bool IsReadOnly {
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44 | get { return ((ICollection<KeyValuePair<TKey, TItem>>)dict).IsReadOnly; }
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45 | }
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46 |
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47 | public TItem this[TKey key] {
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48 | get {
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49 | return dict[key];
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50 | }
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51 | }
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52 | #endregion
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53 |
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54 | #region Constructors
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55 | protected ObservableKeyedCollectionBase() {
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56 | dict = new Dictionary<TKey, TItem>();
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57 | }
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58 | protected ObservableKeyedCollectionBase(int capacity) {
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59 | dict = new Dictionary<TKey, TItem>(capacity);
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60 | }
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61 | protected ObservableKeyedCollectionBase(IEqualityComparer<TKey> comparer) {
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62 | dict = new Dictionary<TKey, TItem>(comparer);
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63 | }
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64 | protected ObservableKeyedCollectionBase(IEnumerable<TItem> collection) {
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65 | if (collection == null) throw new ArgumentNullException();
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66 | dict = new Dictionary<TKey, TItem>();
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67 | foreach (TItem item in collection)
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68 | AddItem(item);
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69 | }
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70 | protected ObservableKeyedCollectionBase(int capacity, IEqualityComparer<TKey> comparer) {
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71 | dict = new Dictionary<TKey, TItem>(capacity, comparer);
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72 | }
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73 | protected ObservableKeyedCollectionBase(IEnumerable<TItem> collection, IEqualityComparer<TKey> comparer) {
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74 | if (collection == null) throw new ArgumentNullException();
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75 | dict = new Dictionary<TKey, TItem>(comparer);
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76 | foreach (TItem item in collection)
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77 | AddItem(item);
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78 | }
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79 | #endregion
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80 |
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81 | #region Destructors
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82 | ~ObservableKeyedCollectionBase() {
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83 | Dispose(false);
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84 | }
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85 | protected virtual void Dispose(bool disposing) {
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86 | if (disposing) {
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87 | Clear();
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88 | }
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89 | }
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90 | public void Dispose() {
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91 | Dispose(true);
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92 | GC.SuppressFinalize(this);
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93 | }
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94 | #endregion
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95 |
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96 | protected abstract TKey GetKeyForItem(TItem item);
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97 | protected void UpdateItemKey(TItem item) {
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98 | if (item == null) throw new ArgumentNullException();
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99 | TKey oldKey = default(TKey);
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100 | bool oldKeyFound = false;
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101 | foreach (KeyValuePair<TKey, TItem> entry in dict) {
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102 | if (entry.Value.Equals(item)) {
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103 | oldKey = entry.Key;
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104 | oldKeyFound = true;
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105 | break;
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106 | }
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107 | }
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108 | if (!oldKeyFound) throw new ArgumentException("item not found");
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109 | dict.Remove(oldKey);
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110 | dict.Add(GetKeyForItem(item), item);
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111 | OnItemsReplaced(new TItem[] { item }, new TItem[] { item });
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112 | }
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113 |
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114 | #region Access
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115 | public bool Contains(TKey key) {
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116 | return dict.ContainsKey(key);
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117 | }
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118 | public bool Contains(TItem item) {
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119 | return dict.ContainsValue(item);
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120 | }
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121 |
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122 | public bool TryGetValue(TKey key, out TItem item) {
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123 | return dict.TryGetValue(key, out item);
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124 | }
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125 |
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126 | public bool Exists(Predicate<TItem> match) {
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127 | if (match == null) throw new ArgumentNullException();
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128 | foreach (TItem item in dict.Values) {
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129 | if (match(item)) return true;
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130 | }
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131 | return false;
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132 | }
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133 |
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134 | public TItem Find(Predicate<TItem> match) {
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135 | if (match == null) throw new ArgumentNullException();
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136 | foreach (TItem item in dict.Values) {
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137 | if (match(item)) return item;
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138 | }
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139 | return default(TItem);
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140 | }
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141 | public ICollection<TItem> FindAll(Predicate<TItem> match) {
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142 | if (match == null) throw new ArgumentNullException();
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143 | List<TItem> result = new List<TItem>();
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144 | foreach (TItem item in dict.Values) {
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145 | if (match(item)) result.Add(item);
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146 | }
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147 | return result;
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148 | }
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149 | #endregion
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150 |
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151 | #region Manipulation
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152 | protected virtual void AddItem(TItem item) {
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153 | dict.Add(GetKeyForItem(item), item);
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154 | }
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155 | public void Add(TItem item) {
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156 | AddItem(item);
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157 | OnItemsAdded(new TItem[] { item });
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158 | }
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159 | public void AddRange(IEnumerable<TItem> collection) {
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160 | if (collection == null) throw new ArgumentNullException();
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161 | foreach (TItem item in collection)
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162 | AddItem(item);
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163 | OnItemsAdded(collection);
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164 | }
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165 |
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166 | protected virtual bool RemoveItem(TItem item) {
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167 | return dict.Remove(GetKeyForItem(item));
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168 | }
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169 | public bool Remove(TKey key) {
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170 | TItem item;
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171 | if (TryGetValue(key, out item)) {
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172 | RemoveItem(item);
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173 | OnItemsRemoved(new TItem[] { item });
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174 | return true;
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175 | }
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176 | return false;
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177 | }
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178 | public bool Remove(TItem item) {
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179 | if (RemoveItem(item)) {
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180 | OnItemsRemoved(new TItem[] { item });
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181 | return true;
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182 | }
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183 | return false;
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184 | }
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185 | public void RemoveRange(IEnumerable<TItem> collection) {
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186 | if (collection == null) throw new ArgumentNullException();
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187 | List<TItem> items = new List<TItem>();
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188 | foreach (TItem item in collection) {
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189 | if (RemoveItem(item))
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190 | items.Add(item);
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191 | }
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192 | if (items.Count > 0)
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193 | OnItemsRemoved(items);
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194 | }
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195 | public int RemoveAll(Predicate<TItem> match) {
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196 | ICollection<TItem> items = FindAll(match);
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197 | RemoveRange(items);
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198 | return items.Count;
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199 | }
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200 |
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201 | protected virtual void ClearItems() {
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202 | dict.Clear();
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203 | }
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204 | public void Clear() {
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205 | TItem[] items = dict.Values.ToArray();
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206 | ClearItems();
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207 | OnCollectionReset(new TItem[0], items);
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208 | }
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209 | #endregion
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210 |
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211 | #region Conversion
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212 | public TItem[] ToArray() {
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213 | return dict.Values.ToArray();
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214 | }
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215 | public void CopyTo(TItem[] array, int arrayIndex) {
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216 | dict.Values.CopyTo(array, arrayIndex);
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217 | }
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218 | public ICollection<TOutput> ConvertAll<TOutput>(Converter<TItem, TOutput> converter) {
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219 | if (converter == null) throw new ArgumentNullException();
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220 | List<TOutput> result = new List<TOutput>();
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221 | foreach (TItem item in dict.Values)
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222 | result.Add(converter(item));
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223 | return result;
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224 | }
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225 | #endregion
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226 |
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227 | #region Processing
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228 | public void ForEach(Action<TItem> action) {
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229 | if (action == null) throw new ArgumentNullException();
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230 | foreach (TItem item in dict.Values)
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231 | action(item);
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232 | }
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233 | public bool TrueForAll(Predicate<TItem> match) {
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234 | if (match == null) throw new ArgumentNullException();
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235 | foreach (TItem item in dict.Values)
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236 | if (! match(item)) return false;
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237 | return true;
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238 | }
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239 | #endregion
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240 |
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241 | #region Enumeration
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242 | public IEnumerator<TItem> GetEnumerator() {
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243 | return dict.Values.GetEnumerator();
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244 | }
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245 | IEnumerator IEnumerable.GetEnumerator() {
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246 | return dict.Values.GetEnumerator();
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247 | }
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248 | #endregion
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249 |
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250 | #region Events
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251 | [field: NonSerialized]
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252 | public event CollectionItemsChangedEventHandler<TItem> ItemsAdded;
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253 | protected virtual void OnItemsAdded(IEnumerable<TItem> items) {
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254 | if (ItemsAdded != null)
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255 | ItemsAdded(this, new CollectionItemsChangedEventArgs<TItem>(items));
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256 | }
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257 |
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258 | [field: NonSerialized]
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259 | public event CollectionItemsChangedEventHandler<TItem> ItemsRemoved;
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260 | protected virtual void OnItemsRemoved(IEnumerable<TItem> items) {
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261 | if (ItemsRemoved != null)
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262 | ItemsRemoved(this, new CollectionItemsChangedEventArgs<TItem>(items));
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263 | }
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264 |
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265 | [field: NonSerialized]
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266 | public event CollectionItemsChangedEventHandler<TItem> ItemsReplaced;
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267 | protected virtual void OnItemsReplaced(IEnumerable<TItem> items, IEnumerable<TItem> oldItems) {
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268 | if (ItemsReplaced != null)
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269 | ItemsReplaced(this, new CollectionItemsChangedEventArgs<TItem>(items, oldItems));
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270 | }
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271 |
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272 | [field: NonSerialized]
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273 | public event CollectionItemsChangedEventHandler<TItem> CollectionReset;
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274 | protected virtual void OnCollectionReset(IEnumerable<TItem> items, IEnumerable<TItem> oldItems) {
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275 | if (CollectionReset != null)
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276 | CollectionReset(this, new CollectionItemsChangedEventArgs<TItem>(items, oldItems));
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277 | }
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278 | #endregion
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279 | }
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280 | }
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