2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import org.apache.oro.text.regex.*;
34 import java.util.ArrayList;
35 import java.util.List;
37 public class StringRoutines {
39 private StringRoutines() {
42 public static int indexOfCharacters(String aString, char[] aCharacters, int aFrom) {
47 for (i=0; i<aCharacters.length ; i++) {
48 position = aString.indexOf(aCharacters[i], aFrom);
50 if (position != -1 && ( result == -1 || position < result )) {
58 public static String replaceStringCharacters(String aText, char[] aCharactersToReplace, String[] aStringsToSubstitute) {
62 int position, nextPosition;
64 StringBuffer result = new StringBuffer();
68 nextPosition = StringRoutines.indexOfCharacters(aText, aCharactersToReplace, position);
71 nextPosition = aText.length();
73 result.append(aText.substring(position, nextPosition));
75 if (nextPosition<aText.length())
76 for (i=0; i<aCharactersToReplace.length; i++) {
77 if (aCharactersToReplace[i] == aText.charAt(nextPosition)) {
78 result.append(aStringsToSubstitute[i]);
82 position=nextPosition+1;
84 while (nextPosition<aText.length()) ;
86 return result.toString();
89 public static String replaceEscapedStringCharacters(String aText, char anEscapeCharacter, char[] aCharactersToReplace, String[] aStringsToSubstitute) {
93 int position, nextPosition;
95 StringBuffer result = new StringBuffer();
99 nextPosition = aText.indexOf(anEscapeCharacter, position);
102 nextPosition = aText.length();
104 result.append(aText.substring(position, nextPosition));
106 if (nextPosition+1<aText.length()) {
107 nextPosition = nextPosition+1;
109 boolean found = false;
110 for (i = 0; i < aCharactersToReplace.length; i++) {
111 if (aCharactersToReplace[i] == aText.charAt(nextPosition)) {
112 result.append(aStringsToSubstitute[i]);
119 result.append(aText.charAt(nextPosition));
122 position=nextPosition+1;
124 while (nextPosition<aText.length()) ;
126 return result.toString();
129 public static String interpretAsString(Object aValue) throws Exception {
130 if (aValue instanceof String)
131 return (String) aValue;
133 if (aValue instanceof Integer)
134 return aValue.toString();
139 throw new Exception("String expected, "+aValue+" found");
142 public static int interpretAsInteger(Object aValue) throws Exception {
143 if (aValue instanceof Integer)
144 return ((Integer) aValue).intValue();
146 if (aValue instanceof String)
148 return Integer.parseInt((String) aValue);
150 catch (Throwable t) {
151 throw new Exception("Integer expected, "+aValue+" found");
154 throw new Exception("Integer expected, "+aValue+" found");
157 public static String performRegularExpressionReplacement(String aSource, String aSearchExpression, String aReplacement) {
159 Pattern pattern = new Perl5Compiler().compile(aSearchExpression);
161 return Util.substitute(
162 new Perl5Matcher(), pattern, new Perl5Substitution(aReplacement), aSource, Util.SUBSTITUTE_ALL);
164 catch (MalformedPatternException t) {
165 throw new UtilFailure("Invalid regular expression", t);
170 * Separates a string based on a separator:
171 * <code>seperateString("a:b:c", ":");</code> will lead to
172 * a List with 3 Strings: <code>"a"</code>, <code>"b"</code> and <code>"c"</code>
174 * @param aString The string to split
179 public static List splitString(String aString, String aSeparator) {
180 List result= new ArrayList();
181 int previousPosition = 0;
185 while ( (position = aString.indexOf(aSeparator, previousPosition)) >= 0) {
186 result.add(aString.substring(previousPosition, position));
187 previousPosition = position + aSeparator.length();
189 result.add(aString.substring(previousPosition, aString.length()));
196 * Separates a String into at most 2 parts based on a separator:
199 * <code>seperateString("a:b:c", ":");</code> will lead to
200 * a List with 2 Strings: <code>"a"</code> and <code>"b:c"</code>
202 * <code>seperateString("abc", ":");</code> will lead to
203 * a List with a single String: <code>"abc"</code>
211 public static List separateString(String aString, String aSeparator) {
212 List result= new ArrayList();
213 int previousPosition = 0;
216 if((position = aString.indexOf(aSeparator, previousPosition))>=0) {
217 result.add(aString.substring(previousPosition, position));
218 previousPosition = position + aSeparator.length();
221 result.add(aString.substring(previousPosition, aString.length()));
227 * Separates a string based on a separator, taking into account an escape character:
228 * <code>seperateString("a:/::b", ":", "/");</code> will lead to
229 * a List with 3 Strings: <code>"a"</code>, <code>":"</code> and <code>"b"</code>
231 * @param aString The string to split
236 public static List splitStringWithEscape(String aString, char aSeparator, char anEscape) {
237 List result= new ArrayList();
238 int previousPosition = 0;
241 StringBuffer currentItem = new StringBuffer();
243 if (aString!=null && aString.length()>0) {
244 while ((position = indexOfCharacters(aString, new char[] {aSeparator, anEscape}, previousPosition))>=0) {
245 currentItem.append(aString.substring(previousPosition, position));
247 if (aString.charAt(position)==aSeparator) {
248 result.add(currentItem.toString());
249 currentItem.delete(0, currentItem.length());
252 if (aString.length()>position+1) {
254 currentItem.append(aString.charAt(position));
257 currentItem.append(aString.charAt(position));
260 previousPosition = position + 1;
262 currentItem.append(aString.substring(previousPosition, aString.length()));
263 result.add(currentItem.toString());
269 public static String replicateString(String aString, int aCount) {
270 StringBuffer result = new StringBuffer();
272 for (int i=0; i<aCount; i++)
273 result.append(aString);
275 return result.toString();
278 public static String replicateChar(char aCharacter, int aCount) {
279 char result[] = new char[aCount];
281 for (int i=0; i<aCount; i++)
282 result[i]= aCharacter;
284 return new String(result);
287 public static String padStringLeft(String aString, int aLength, char aPadCharacter) {
288 if (aString.length()<aLength)
289 return replicateChar(aPadCharacter, aLength-aString.length()) + aString;
293 private static final char HEX_CHARACTERS[] = {
294 '0', '1', '2', '3', '4', '5', '6', '7',
295 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
298 public static String convertToHex(long aData, int aNumberOfDigits) {
299 StringBuffer result = new StringBuffer();
301 for (int digit = aNumberOfDigits-1; digit>=0; digit--) {
302 int value = (int) (aData >> (digit*4)) & 0xf;
303 result.append(HEX_CHARACTERS[value]);
306 return result.toString();
309 public static String convertToHex(byte[] aData) {
310 StringBuffer result = new StringBuffer();
312 for (int i = 0; i<aData.length; i++) {
313 result.append(convertToHex(aData[i], 2));
317 return result.toString();