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comparison org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/list/WritableList.d @ 78:0a55d2d5a946

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Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
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76:f05e6e8b2f2d 78:0a55d2d5a946
1 /*******************************************************************************
2 * Copyright (c) 2005, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Brad Reynolds - bug 164653
11 * Brad Reynolds - bug 167204
12 * Gautam Saggar - bug 169529
13 * Brad Reynolds - bug 147515
14 * Matthew Hall - bug 208858, 213145
15 *******************************************************************************/
16 module org.eclipse.core.databinding.observable.list.WritableList;
17
18 import java.lang.all;
19
20 import java.util.ArrayList;
21 import java.util.Collection;
22 import java.util.Iterator;
23 import java.util.List;
24
25 import org.eclipse.core.databinding.observable.Diffs;
26 import org.eclipse.core.databinding.observable.Realm;
27
28 /**
29 * Mutable observable list backed by an ArrayList.
30 *
31 * <p>
32 * This class is thread safe. All state accessing methods must be invoked from
33 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
34 * listeners may be invoked from any thread.
35 * </p>
36 *
37 * @since 1.0
38 */
39 public class WritableList : ObservableList {
40
41 /**
42 * Creates an empty writable list in the default realm with a
43 * <code>null</code> element type.
44 *
45 */
46 public this() {
47 this(Realm.getDefault());
48 }
49
50 /**
51 * Creates an empty writable list with a <code>null</code> element type.
52 *
53 * @param realm
54 */
55 public this(Realm realm) {
56 this(realm, new ArrayList(), null);
57 }
58
59 /**
60 * Constructs a new instance with the default realm.
61 *
62 * @param toWrap
63 * @param elementType
64 * can be <code>null</code>
65 */
66 public this(List toWrap, Object elementType) {
67 this(Realm.getDefault(), toWrap, elementType);
68 }
69
70 /**
71 * Creates a writable list containing elements of the given type, wrapping
72 * an existing client-supplied list.
73 *
74 * @param realm
75 * @param toWrap
76 * The java.utilList to wrap
77 * @param elementType
78 * can be <code>null</code>
79 */
80 public this(Realm realm, List toWrap, Object elementType) {
81 super(realm, toWrap, elementType);
82 }
83
84 public Object set(int index, Object element) {
85 checkRealm();
86 Object oldElement = wrappedList.set(index, element);
87 fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
88 false, oldElement), Diffs.createListDiffEntry(index, true,
89 element)));
90 return oldElement;
91 }
92
93 /**
94 * @since 1.1
95 */
96 public Object move(int oldIndex, int newIndex) {
97 checkRealm();
98 int size = wrappedList.size();
99 if (oldIndex < 0 || oldIndex >= size)
100 throw new IndexOutOfBoundsException(
101 "oldIndex: " + oldIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$
102 if (newIndex < 0 || newIndex >= size)
103 throw new IndexOutOfBoundsException(
104 "newIndex: " + newIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$
105 if (oldIndex is newIndex)
106 return wrappedList.get(oldIndex);
107 Object element = wrappedList.remove(oldIndex);
108 wrappedList.add(newIndex, element);
109 fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(oldIndex,
110 false, element), Diffs.createListDiffEntry(newIndex, true,
111 element)));
112 return element;
113 }
114
115 public Object remove(int index) {
116 checkRealm();
117 Object oldElement = wrappedList.remove(index);
118 fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
119 false, oldElement)));
120 return oldElement;
121 }
122
123 public bool add(Object element) {
124 checkRealm();
125 bool added = wrappedList.add(element);
126 if (added) {
127 fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(
128 wrappedList.size() - 1, true, element)));
129 }
130 return added;
131 }
132
133 public void add(int index, Object element) {
134 checkRealm();
135 wrappedList.add(index, element);
136 fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
137 true, element)));
138 }
139
140 public bool addAll(Collection c) {
141 checkRealm();
142 ListDiffEntry[] entries = new ListDiffEntry[c.size()];
143 int i = 0;
144 int addIndex = wrappedList.size();
145 for (Iterator it = c.iterator(); it.hasNext();) {
146 Object element = it.next();
147 entries[i++] = Diffs.createListDiffEntry(addIndex++, true, element);
148 }
149 bool added = wrappedList.addAll(c);
150 fireListChange(Diffs.createListDiff(entries));
151 return added;
152 }
153
154 public bool addAll(int index, Collection c) {
155 checkRealm();
156 ListDiffEntry[] entries = new ListDiffEntry[c.size()];
157 int i = 0;
158 int addIndex = index;
159 for (Iterator it = c.iterator(); it.hasNext();) {
160 Object element = it.next();
161 entries[i++] = Diffs.createListDiffEntry(addIndex++, true, element);
162 }
163 bool added = wrappedList.addAll(index, c);
164 fireListChange(Diffs.createListDiff(entries));
165 return added;
166 }
167
168 public bool remove(Object o) {
169 checkRealm();
170 int index = wrappedList.indexOf(o);
171 if (index is -1) {
172 return false;
173 }
174 wrappedList.remove(index);
175 fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index,
176 false, o)));
177 return true;
178 }
179
180 public bool removeAll(Collection c) {
181 checkRealm();
182 List entries = new ArrayList();
183 for (Iterator it = c.iterator(); it.hasNext();) {
184 Object element = it.next();
185 int removeIndex = wrappedList.indexOf(element);
186 if (removeIndex !is -1) {
187 wrappedList.remove(removeIndex);
188 entries.add(Diffs.createListDiffEntry(removeIndex, false,
189 element));
190 }
191 }
192 if (entries.size() > 0)
193 fireListChange(Diffs.createListDiff(cast(ListDiffEntry[]) entries
194 .toArray(new ListDiffEntry[entries.size()])));
195 return entries.size() > 0;
196 }
197
198 public bool retainAll(Collection c) {
199 checkRealm();
200 List entries = new ArrayList();
201 int removeIndex = 0;
202 for (Iterator it = wrappedList.iterator(); it.hasNext();) {
203 Object element = it.next();
204 if (!c.contains(element)) {
205 entries.add(Diffs.createListDiffEntry(removeIndex, false,
206 element));
207 it.remove();
208 } else {
209 // only increment if we haven't removed the current element
210 removeIndex++;
211 }
212 }
213 if (entries.size() > 0)
214 fireListChange(Diffs.createListDiff(cast(ListDiffEntry[]) entries
215 .toArray(new ListDiffEntry[entries.size()])));
216 return entries.size() > 0;
217 }
218
219 public void clear() {
220 checkRealm();
221 List entries = new ArrayList();
222 for (Iterator it = wrappedList.iterator(); it.hasNext();) {
223 Object element = it.next();
224 // always report 0 as the remove index
225 entries.add(Diffs.createListDiffEntry(0, false, element));
226 it.remove();
227 }
228 fireListChange(Diffs.createListDiff(cast(ListDiffEntry[]) entries
229 .toArray(new ListDiffEntry[entries.size()])));
230 }
231
232 /**
233 * @param elementType
234 * can be <code>null</code>
235 * @return new list with the default realm.
236 */
237 public static WritableList withElementType(Object elementType) {
238 return new WritableList(Realm.getDefault(), new ArrayList(),
239 elementType);
240 }
241 }