1 /*
2 * EL4J, the Extension Library for the J2EE, adds incremental enhancements to
3 * the spring framework, http://el4j.sf.net
4 * Copyright (C) 2005 by ELCA Informatique SA, Av. de la Harpe 22-24,
5 * 1000 Lausanne, Switzerland, http://www.elca.ch
6 *
7 * EL4J is published under the GNU Lesser General Public License (LGPL)
8 * Version 2.1. See http://www.gnu.org/licenses/
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 Lesser General Public License for more details.
14 *
15 * For alternative licensing, please contact info@elca.ch
16 */
17
18 package ch.elca.el4j.util.codingsupport;
19
20
21 /**
22 * This class supports methods to handle with objects. It covers only caps of
23 * class <code>org.springframework.util.ObjectUtils</code>.
24 *
25 * @svnLink $Revision: 3881 $;$Date: 2009-08-04 15:22:05 +0200 (Di, 04. Aug 2009) $;$Author: swismer $;$URL: https://el4j.svn.sourceforge.net/svnroot/el4j/branches/el4j_3_1/el4j/framework/modules/core/src/main/java/ch/elca/el4j/util/codingsupport/ObjectUtils.java $
26 *
27 * @author Martin Zeltner (MZE)
28 */
29 public final class ObjectUtils {
30
31 /**
32 * Default constructor.
33 */
34 private ObjectUtils() {
35 }
36
37 /**
38 * This method is used to compare two strings.
39 *
40 * @param s1 Is the first string.
41 * @param s2 Is the second string.
42 * @return Returns true if s1 and s2 are null or empty and naturally if they
43 * are equals.
44 */
45 public static boolean nullSaveEquals(String s1, String s2) {
46 if ((s1 == null || s1.length() == 0)
47 && (s2 == null || s2.length() == 0)) {
48 return true;
49 } else {
50 return s1 != null && s1.equals(s2);
51 }
52 }
53
54 /**
55 * Method which always returns a string object.
56 *
57 * @param s
58 * Is the string to check.
59 * @return Returns an empty string if given string object is null, otherwise
60 * the given string.
61 */
62 public static String asString(String s) {
63 return s == null ? "" : s;
64 }
65 }