001: /*
002: License $Id: SingleDelimiterStringTokenizer.java,v 1.4 2003/09/13 04:59:58 hendriks73 Exp $
003:
004: Copyright (c) 2001-2005 tagtraum industries.
005:
006: LGPL
007: ====
008:
009: jo! is free software; you can redistribute it and/or
010: modify it under the terms of the GNU Lesser General Public
011: License as published by the Free Software Foundation; either
012: version 2.1 of the License, or (at your option) any later version.
013:
014: jo! is distributed in the hope that it will be useful,
015: but WITHOUT ANY WARRANTY; without even the implied warranty of
016: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017: Lesser General Public License for more details.
018:
019: You should have received a copy of the GNU Lesser General Public
020: License along with this library; if not, write to the Free Software
021: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
022:
023: For LGPL see <http://www.fsf.org/copyleft/lesser.txt>
024:
025:
026: Sun license
027: ===========
028:
029: This release contains software by Sun Microsystems. Therefore
030: the following conditions have to be met, too. They apply to the
031: files
032:
033: - lib/mail.jar
034: - lib/activation.jar
035: - lib/jsse.jar
036: - lib/jcert.jar
037: - lib/jaxp.jar
038: - lib/crimson.jar
039: - lib/servlet.jar
040: - lib/jnet.jar
041: - lib/jaas.jar
042: - lib/jaasmod.jar
043:
044: contained in this release.
045:
046: a. Licensee may not modify the Java Platform
047: Interface (JPI, identified as classes contained within the javax
048: package or any subpackages of the javax package), by creating additional
049: classes within the JPI or otherwise causing the addition to or modification
050: of the classes in the JPI. In the event that Licensee creates any
051: Java-related API and distribute such API to others for applet or
052: application development, you must promptly publish broadly, an accurate
053: specification for such API for free use by all developers of Java-based
054: software.
055:
056: b. Software is confidential copyrighted information of Sun and
057: title to all copies is retained by Sun and/or its licensors. Licensee
058: shall not modify, decompile, disassemble, decrypt, extract, or otherwise
059: reverse engineer Software. Software may not be leased, assigned, or
060: sublicensed, in whole or in part. Software is not designed or intended
061: for use in on-line control of aircraft, air traffic, aircraft navigation
062: or aircraft communications; or in the design, construction, operation or
063: maintenance of any nuclear facility. Licensee warrants that it will not
064: use or redistribute the Software for such purposes.
065:
066: c. Software is provided "AS IS," without a warranty
067: of any kind. ALL EXPRESS OR IMPLIED REPRESENTATIONS AND WARRANTIES,
068: INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
069: PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED.
070:
071: d. This License is effective until terminated. Licensee may
072: terminate this License at any time by destroying all copies of Software.
073: This License will terminate immediately without notice from Sun if Licensee
074: fails to comply with any provision of this License. Upon such termination,
075: Licensee must destroy all copies of Software.
076:
077: e. Software, including technical data, is subject to U.S.
078: export control laws, including the U.S. Export Administration Act and its
079: associated regulations, and may be subject to export or import regulations
080: in other countries. Licensee agrees to comply strictly with all such
081: regulations and acknowledges that it has the responsibility to obtain
082: licenses to export, re-export, or import Software. Software may not be
083: downloaded, or otherwise exported or re-exported (i) into, or to a national
084: or resident of, Cuba, Iraq, Iran, North Korea, Libya, Sudan, Syria or any
085: country to which the U.S. has embargoed goods; or (ii) to anyone on the
086: U.S. Treasury Department's list of Specially Designated Nations or the U.S.
087: Commerce Department's Table of Denial Orders.
088:
089:
090: Feedback
091: ========
092:
093: We encourage your feedback and suggestions and want to use your feedback to
094: improve the Software. Send all such feedback to:
095: <feedback@tagtraum.com>
096:
097: For more information on tagtraum industries and jo!
098: please see <http://www.tagtraum.com/>.
099:
100:
101: */
102: package com.tagtraum.perf.util;
103:
104: import java.util.Enumeration;
105: import java.util.NoSuchElementException;
106:
107: /**
108: * StringTokenizer that speeds up tokenizing for strings that are separated by
109: * one and only one char. The speed is significantly faster, when the tokens are
110: * short.
111: *
112: * @author <a href="mailto:hs@tagtraum.com">Hendrik Schreiber</a>
113: * @version 1.1beta1 $Id: SingleDelimiterStringTokenizer.java,v 1.4 2003/09/13 04:59:58 hendriks73 Exp $
114: */
115: public final class SingleDelimiterStringTokenizer implements
116: Enumeration {
117:
118: /**
119: * Source-Version
120: */
121: public static String vcid = "$Id: SingleDelimiterStringTokenizer.java,v 1.4 2003/09/13 04:59:58 hendriks73 Exp $";
122:
123: //private char[] cbuf;
124: private char delim;
125: private int pos;
126: private String string;
127: private int length;
128:
129: public SingleDelimiterStringTokenizer() {
130: init("", ' ');
131: }
132:
133: public SingleDelimiterStringTokenizer(String string) {
134: init(string, ' ');
135: }
136:
137: public SingleDelimiterStringTokenizer(String string, char delim) {
138: init(string, delim);
139: }
140:
141: public void init(String string, char delim) {
142: this .delim = delim;
143: this .string = string;
144: length = string.length();
145: if (length > 0 && string.charAt(0) == delim)
146: pos = 1;
147: else
148: pos = 0;
149: }
150:
151: public boolean hasMoreElements() {
152: return hasMoreTokens();
153: }
154:
155: public boolean hasMoreTokens() {
156: return !(pos >= length);
157: }
158:
159: public Object nextElement() {
160: return nextToken();
161: }
162:
163: public String nextToken() {
164: if (pos >= length)
165: throw new NoSuchElementException();
166: int start = pos;
167: while (pos < length && string.charAt(pos) != delim) {
168: pos++;
169: }
170: String token = string.substring(start, pos);
171: pos++; // skip next delimiter
172: return token;
173: }
174:
175: public int countTokens() {
176: if (pos >= length)
177: return 0;
178: int count = 0;
179: int countPos = pos;
180: while (true) {
181: if (countPos >= length)
182: return count;
183: count++;
184: while (string.charAt(countPos) != delim) {
185: countPos++;
186: if (countPos >= length)
187: return count;
188: }
189: countPos++;
190: }
191: }
192: }
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