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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/internal/databinding/observable/EmptyObservableList.d @ 96:b74ac5dfcc06

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package to module and java.lang.all import
author Frank Benoit <benoit@tionex.de>
date Tue, 21 Apr 2009 11:03:33 +0200
parents 6208d4f6a277
children
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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 208858
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11 * Matthew Hall - bug 208332
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12 *******************************************************************************/
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13
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14 module org.eclipse.core.internal.databinding.observable.EmptyObservableList;
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15
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16 import java.lang.all;
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17
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18 import java.util.Collection;
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19 import java.util.Collections;
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20 import java.util.Iterator;
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21 import java.util.List;
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22 import java.util.ListIterator;
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23
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24 import org.eclipse.core.databinding.observable.IChangeListener;
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25 import org.eclipse.core.databinding.observable.IStaleListener;
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26 import org.eclipse.core.databinding.observable.Realm;
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27 import org.eclipse.core.databinding.observable.list.IListChangeListener;
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28 import org.eclipse.core.databinding.observable.list.IObservableList;
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29 import org.eclipse.core.runtime.Assert;
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30
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31 /**
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32 * Singleton empty list
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33 */
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34 public class EmptyObservableList : IObservableList {
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35
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36 private static final List emptyList = Collections.EMPTY_LIST;
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37
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38 private Realm realm;
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39 private Object elementType;
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40
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41 /**
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42 * Creates an empty list. This list may be disposed multiple times
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43 * without any side-effects.
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44 *
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45 * @param realm
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46 * the realm of the constructed list
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47 */
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48 public this(Realm realm) {
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49 this(realm, null);
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50 }
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51
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52 /**
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53 * Creates an empty list. This list may be disposed multiple times
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54 * without any side-effects.
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55 *
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56 * @param realm
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57 * the realm of the constructed list
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58 * @param elementType
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59 * the element type of the constructed list
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60 * @since 1.1
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61 */
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62 public this(Realm realm, Object elementType) {
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63 this.realm = realm;
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64 this.elementType = elementType;
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65 }
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66
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67 public void addListChangeListener(IListChangeListener listener) {
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68 // ignore
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69 }
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70
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71 public void removeListChangeListener(IListChangeListener listener) {
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72 // ignore
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73 }
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74
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75 public Object getElementType() {
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76 return elementType;
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77 }
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78
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79 public int size() {
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80 checkRealm();
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81 return 0;
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82 }
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83
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84 void checkRealm() {
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85 Assert.isTrue(realm.isCurrent(),
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86 "Observable cannot be accessed outside its realm"); //$NON-NLS-1$
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87 }
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88
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89 public bool isEmpty() {
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90 checkRealm();
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91 return true;
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92 }
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93
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94 public bool contains(Object o) {
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95 checkRealm();
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96 return false;
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97 }
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98
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99 public Iterator iterator() {
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100 checkRealm();
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101 return emptyList.iterator();
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102 }
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103
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104 public Object[] toArray() {
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105 checkRealm();
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106 return emptyList.toArray();
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107 }
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108
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109 public Object[] toArray(Object[] a) {
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110 return emptyList.toArray(a);
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111 }
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112
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113 public bool add(Object o) {
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114 throw new UnsupportedOperationException();
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115 }
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116
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117 public bool remove(Object o) {
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118 throw new UnsupportedOperationException();
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119 }
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120
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121 public bool containsAll(Collection c) {
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122 checkRealm();
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123 return c.isEmpty();
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124 }
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125
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126 public bool addAll(Collection c) {
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127 throw new UnsupportedOperationException();
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128 }
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129
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130 public bool retainAll(Collection c) {
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131 throw new UnsupportedOperationException();
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132 }
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133
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134 public bool removeAll(Collection c) {
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135 throw new UnsupportedOperationException();
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136 }
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137
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138 public void clear() {
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139 throw new UnsupportedOperationException();
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140 }
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141
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142 public void addChangeListener(IChangeListener listener) {
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143 }
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144
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145 public void removeChangeListener(IChangeListener listener) {
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146 }
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147
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148 public void addStaleListener(IStaleListener listener) {
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149 }
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150
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151 public void removeStaleListener(IStaleListener listener) {
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152 }
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153
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154 public bool isStale() {
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155 checkRealm();
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156 return false;
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157 }
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158
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159 public void dispose() {
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160 }
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161
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162 public bool addAll(int index, Collection c) {
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163 throw new UnsupportedOperationException();
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164 }
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165
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166 public Object get(int index) {
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167 return emptyList.get(index);
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168 }
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169
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170 public int indexOf(Object o) {
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171 return -1;
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172 }
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173
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174 public int lastIndexOf(Object o) {
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175 return -1;
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176 }
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177
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178 public ListIterator listIterator() {
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179 return emptyList.listIterator();
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180 }
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181
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182 public ListIterator listIterator(int index) {
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183 return emptyList.listIterator(index);
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184 }
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185
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186 public Object remove(int index) {
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187 throw new UnsupportedOperationException();
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188 }
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189
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190 public Object set(int index, Object element) {
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191 throw new UnsupportedOperationException();
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192 }
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193
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194 public Object move(int oldIndex, int newIndex) {
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195 throw new UnsupportedOperationException();
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196 }
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197
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198 public List subList(int fromIndex, int toIndex) {
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199 return emptyList.subList(fromIndex, toIndex);
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200 }
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201
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202 public void add(int index, Object o) {
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203 throw new UnsupportedOperationException();
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204 }
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205
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206 public Realm getRealm() {
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207 return realm;
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208 }
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209
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210 public override equals_t opEquals(Object obj) {
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211 checkRealm();
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212 if (obj is this)
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213 return true;
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214 if (obj is null)
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215 return false;
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216 if (!( null !is cast(List)obj ))
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217 return false;
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218
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219 return (cast(List) obj).isEmpty();
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220 }
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221
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222 public override hash_t toHash() {
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223 checkRealm();
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224 return 1;
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225 }
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226 }