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comparison org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/IdentityWrapper.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) 2006 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 * Daniel Kruegler - bug 137435
11 ******************************************************************************/
12
13 module org.eclipse.core.internal.databinding.IdentityWrapper;
14
15 import java.lang.all;
16
17 /**
18 * Used for wrapping objects that define their own implementations of equals()
19 * and hashCode() when putting them in sets or hashmaps to ensure identity
20 * comparison.
21 *
22 * @since 1.0
23 *
24 */
25 public class IdentityWrapper {
26 final Object o;
27
28 /**
29 * @param o
30 */
31 public this(Object o) {
32 this.o = o;
33 }
34
35 /**
36 * @return the unwrapped object
37 */
38 public Object unwrap() {
39 return o;
40 }
41
42 public override bool opEquals(Object obj) {
43 if (obj is null || obj.getClass() !is IdentityWrapper.classinfo) {
44 return false;
45 }
46 return o is (cast(IdentityWrapper) obj).o;
47 }
48
49 public int hashCode() {
50 return System.identityHashCode(o);
51 }
52 }