1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.common.util;
25
26 /**
27 * Common utility methods for general objects.
28 */
29 public class ObjectUtil {
30
31 public static <Type> boolean isEqualNoNulls( Type reference1,
32 Type reference2 ) {
33 return reference1.equals(reference2);
34 }
35
36 public static <Type> boolean isEqualWithNulls( Type reference1,
37 Type reference2 ) {
38 return reference1 == null ? reference2 == null : reference1.equals(reference2);
39 }
40
41 @SuppressWarnings( "unchecked" )
42 public static int compareNoNulls( Comparable reference1,
43 Comparable reference2 ) {
44 return reference1.compareTo(reference2);
45 }
46
47 @SuppressWarnings( "unchecked" )
48 public static int compareWithNulls( Comparable reference1,
49 Comparable reference2 ) {
50 if (reference1 == null) return reference2 == null ? 0 : 1;
51 if (reference2 == null) return 1;
52 return reference1.compareTo(reference2);
53 }
54 }