1 /*
2 * Copyright (C) 2007 ETH Zurich
3 *
4 * This file is part of Fosstrak (www.fosstrak.org).
5 *
6 * Fosstrak is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License version 2.1, as published by the Free Software Foundation.
9 *
10 * Fosstrak is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with Fosstrak; if not, write to the Free
17 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301 USA
19 */
20
21 package org.fosstrak.epcis.repository;
22
23 /**
24 * Miscellaneous utility functions.
25 *
26 * @author Sean Wellington
27 */
28 public class Utils {
29
30 /**
31 * @return <code>true</code> if both <code>o1</code> and <code>o2</code>
32 * are <code>null</code>; or <code>o1</code> and
33 * <code>o2</code> are both non-<code>null</code> and equal
34 * according to their <code>equals()</code> methods.
35 */
36 public static final boolean eq(Object o1, Object o2) {
37 return (o1 == null && o2 == null) || (o1 != null && o2 != null && o1.equals(o2));
38 }
39
40 /**
41 * @return <code>o.hashCode()</code> or <code>0</code> if <code>o</code>
42 * is <code>null</code>.
43 */
44 public static final int hc(Object o) {
45 return o != null ? o.hashCode() : 0;
46 }
47
48 /**
49 * Hidden default constructor.
50 */
51 private Utils() {
52 }
53 }