1 /*
2 * PROJECT : DAR Runtime and Tools
3 * COPYRIGHT : Copyright (C) 1999-2004 tim.stephenson@enableit.org
4 * LICENSE : GNU LESSER GENERAL PUBLIC LICENSE
5 * Version 2.1, February 1999
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 package org.enableit.db.util;
22
23 import org.apache.log4j.Logger;
24
25
26 /***
27 * @author $Author: tim $
28 */
29 public class StringHelper extends Object {
30 /*
31 * Properties
32 */
33
34 /***
35 * The Log4J <code>Logger</code> doing the logging.
36 */
37 private static Logger logger = Logger.getLogger(StringHelper.class);
38
39 /***
40 * CVS info ABOUT this class and its current version
41 */
42 public static final String ABOUT = "$Revision: 1.5 $";
43
44 /*
45 * Constructors
46 */
47
48 /***
49 * Constructor to prevent instantiation.
50 */
51 private StringHelper() {
52 }
53
54 /*
55 * Methods
56 */
57
58 /***
59 * Trims leading and trailing whitespace as defined by the Unicode
60 * (unlike <code>java.lang.String.trim()</code>).
61 */
62 public static String trim(String s) {
63 logger.info("METHOD_ENTRY: trim, string: " + s);
64
65 StringBuffer sb = new StringBuffer();
66 boolean started = false;
67
68 for (int y = 0; y < s.length(); y++) {
69 char c = s.charAt(y);
70
71 if (!Character.isSpaceChar(c)) {
72 started = true;
73 }
74
75 if (started) {
76 logger.debug("c: " + c + "y: " + y);
77 sb.append(s.substring(y));
78
79 break;
80 }
81 }
82
83 s = sb.toString();
84 logger.debug("After leading trim: " + s);
85 sb = new StringBuffer();
86 started = false;
87
88 for (int y = s.length() - 1; y > 0; y--) {
89 char c = s.charAt(y);
90
91 if (!Character.isSpaceChar(c)) {
92 started = true;
93 }
94
95 if (started) {
96 sb.append(s.substring(0, y + 1));
97
98 break;
99 }
100 }
101
102 logger.info("METHOD_EXIT: trim, returning: " + sb);
103
104 return sb.toString();
105 }
106 }
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