Source code: javatools/util/Compare.java
1 /*
2 Javatools (modified version) - Some useful general classes.
3 Copyright (C) 2002-2003 Chris Bitmead (original) Antonio Petrelli (modified)
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program 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
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Contact me at: brenmcguire@users.sourceforge.net
20 */
21 package javatools.util;
22
23 /** Such a preliminary class.
24 */
25 public class Compare {
26 /** Equals object to object.
27 * @param o1 The first term.
28 * @param o2 The second term.
29 * @return Are they equal?
30 */
31 public static boolean eq(Object o1, Object o2) {
32 if (o1 == null && o2 == null) {
33 return true;
34 } else if (o1 == null || o2 == null) {
35 return false;
36 } else {
37 return o1.equals(o2);
38 }
39 }
40
41 /** Returns the hash code for an object, or zero for a null object.
42 * @param o The object to hash.
43 * @return The hash code.
44 */
45 public static int hashOne(Object o) {
46 if (o == null) {
47 return 0;
48 } else {
49 return o.hashCode();
50 }
51 }
52 }