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1 /*******************************************************************************
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2 * Copyright (c) 2006, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Matthew Hall - bug 208332
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11 *******************************************************************************/
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12
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13 module org.eclipse.core.databinding.observable.set.ObservableSet;
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14
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15 import java.lang.all;
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16
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17 import java.util.Collection;
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18 import java.util.Iterator;
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19 import java.util.Set;
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20
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21 import org.eclipse.core.databinding.observable.AbstractObservable;
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22 import org.eclipse.core.databinding.observable.ObservableTracker;
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23 import org.eclipse.core.databinding.observable.Realm;
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24
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25 /**
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26 *
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27 * Abstract implementation of {@link IObservableSet}.
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28 *
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29 * <p>
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30 * This class is thread safe. All state accessing methods must be invoked from
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31 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
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32 * listeners may be invoked from any thread.
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33 * </p>
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34 *
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35 * @since 1.0
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36 *
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37 */
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38 public abstract class ObservableSet : AbstractObservable ,
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39 IObservableSet {
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40
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41 protected Set wrappedSet;
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42
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43 private bool stale = false;
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44
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45 protected Object elementType;
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46
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47 protected this(Set wrappedSet, Object elementType) {
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48 this(Realm.getDefault(), wrappedSet, elementType);
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49 }
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50
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51 protected this(Realm realm, Set wrappedSet, Object elementType) {
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52 super(realm);
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53 this.wrappedSet = wrappedSet;
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54 this.elementType = elementType;
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55 }
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56
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57 public synchronized void addSetChangeListener(ISetChangeListener listener) {
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58 addListener(SetChangeEvent.TYPE, listener);
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59 }
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60
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61 public synchronized void removeSetChangeListener(ISetChangeListener listener) {
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62 removeListener(SetChangeEvent.TYPE, listener);
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63 }
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64
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65 protected void fireSetChange(SetDiff diff) {
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66 // fire general change event first
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67 super.fireChange();
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68
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69 fireEvent(new SetChangeEvent(this, diff));
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70 }
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71
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72 public bool contains(Object o) {
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73 getterCalled();
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74 return wrappedSet.contains(o);
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75 }
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76
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77 public bool containsAll(Collection c) {
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78 getterCalled();
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79 return wrappedSet.containsAll(c);
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80 }
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81
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82 public override bool opEquals(Object o) {
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83 getterCalled();
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84 return wrappedSet.equals(o);
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85 }
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86
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87 public int hashCode() {
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88 getterCalled();
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89 return wrappedSet.hashCode();
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90 }
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91
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92 public bool isEmpty() {
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93 getterCalled();
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94 return wrappedSet.isEmpty();
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95 }
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96
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97 public Iterator iterator() {
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98 getterCalled();
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99 final Iterator wrappedIterator = wrappedSet.iterator();
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100 return new class() Iterator {
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101
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102 public void remove() {
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103 throw new UnsupportedOperationException();
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104 }
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105
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106 public bool hasNext() {
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107 ObservableTracker.getterCalled(this.outer);
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108 return wrappedIterator.hasNext();
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109 }
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110
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111 public Object next() {
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112 ObservableTracker.getterCalled(this.outer);
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113 return wrappedIterator.next();
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114 }
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115 };
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116 }
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117
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118 public int size() {
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119 getterCalled();
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120 return wrappedSet.size();
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121 }
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122
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123 public Object[] toArray() {
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124 getterCalled();
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125 return wrappedSet.toArray();
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126 }
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127
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128 public Object[] toArray(Object[] a) {
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129 getterCalled();
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130 return wrappedSet.toArray(a);
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131 }
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132
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133 public String toString() {
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134 getterCalled();
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135 return wrappedSet.toString();
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136 }
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137
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138 protected void getterCalled() {
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139 ObservableTracker.getterCalled(this);
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140 }
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141
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142 public bool add(Object o) {
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143 throw new UnsupportedOperationException();
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144 }
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145
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146 public bool addAll(Collection c) {
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147 throw new UnsupportedOperationException();
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148 }
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149
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150 public bool remove(Object o) {
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151 throw new UnsupportedOperationException();
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152 }
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153
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154 public bool removeAll(Collection c) {
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155 throw new UnsupportedOperationException();
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156 }
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157
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158 public bool retainAll(Collection c) {
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159 throw new UnsupportedOperationException();
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160 }
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161
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162 public void clear() {
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163 throw new UnsupportedOperationException();
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164 }
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165
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166 /**
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167 * @return Returns the stale state.
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168 */
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169 public bool isStale() {
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170 getterCalled();
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171 return stale;
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172 }
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173
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174 /**
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175 * @param stale
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176 * The stale state to set. This will fire a stale event if the
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177 * given bool is true and this observable set was not already
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178 * stale.
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179 */
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180 public void setStale(bool stale) {
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181 checkRealm();
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182 bool wasStale = this.stale;
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183 this.stale = stale;
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184 if (!wasStale && stale) {
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185 fireStale();
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186 }
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187 }
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188
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189 /**
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190 * @param wrappedSet The wrappedSet to set.
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191 */
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192 protected void setWrappedSet(Set wrappedSet) {
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193 this.wrappedSet = wrappedSet;
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194 }
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195
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196 protected void fireChange() {
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197 throw new RuntimeException("fireChange should not be called, use fireSetChange() instead"); //$NON-NLS-1$
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198 }
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199
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200 /* (non-Javadoc)
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201 * @see org.eclipse.jface.provisional.databinding.observable.AbstractObservable#dispose()
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202 */
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203 public synchronized void dispose() {
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204 super.dispose();
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205 }
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206
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207 public Object getElementType() {
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208 return elementType;
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209 }
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210 }
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