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comparison flys-backend/src/main/java/de/intevation/flys/utils/StringUtil.java @ 508:a9c7f6ec3a5a 2.3.1

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merged flys-backend/2.3.1
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:12 +0200
parents ed38839a6b08
children 6662b0ea20c1
comparison
equal deleted inserted replaced
462:ebf049a1eb53 508:a9c7f6ec3a5a
1 package de.intevation.flys.utils;
2
3 /**
4 * Copyright (c) 2006 by Intevation GmbH
5 *
6 * @author Sascha L. Teichmann (teichmann@intevation.de)
7 * @author Ludwig Reiter (ludwig@intevation.de)
8 *
9 * This program is free software under the LGPL (&gt;=v2.1)
10 * Read the file LGPL coming with FLYS for details.
11 */
12 import java.util.Arrays;
13 import java.util.ArrayList;
14 import java.util.Locale;
15
16 import java.net.URLEncoder;
17 import java.net.URLDecoder;
18
19 import java.io.UnsupportedEncodingException;
20 import java.io.IOException;
21 import java.io.BufferedReader;
22 import java.io.StringReader;
23 import java.io.StringWriter;
24 import java.io.PrintWriter;
25
26 public final class StringUtil {
27 final static String NUMBER_SEPERATOR = ";";
28 final static String LINE_SEPERATOR = ":";
29
30 private StringUtil() {
31 }
32
33 public static final String double2DArrayToString(double[][] values) {
34
35 if (values == null) {
36 throw new IllegalArgumentException("keine double[][]-Werte");
37 }
38
39 StringBuilder strbuf = new StringBuilder();
40
41 for (int i=0; i < values.length; i++) {
42 if (i>0) {
43 strbuf.append(LINE_SEPERATOR);
44 }
45 for (int j=0; j < values[i].length; j++) {
46 if (j > 0) {
47 strbuf.append(NUMBER_SEPERATOR);
48 }
49 strbuf.append(values[i][j]);
50 }
51 }
52
53 return strbuf.toString();
54 }
55
56 public static final double[][] stringToDouble2DArray(String str) {
57 if (str == null || str.length() == 0) {
58 return null;
59 }
60
61 String[] lineSplit = str.split(LINE_SEPERATOR);
62 double[][] array2D = new double[lineSplit.length][];
63 for (int i=0; i < lineSplit.length; i++) {
64 String[] numberSplit = lineSplit[i].split(NUMBER_SEPERATOR);
65
66 double[] numbers = new double[numberSplit.length];
67 for (int j=0; j < numberSplit.length; j++) {
68 numbers[j] = Double.valueOf(numberSplit[j]).doubleValue();
69 }
70
71 array2D[i] = numbers;
72 }
73
74 return array2D;
75 }
76
77 public static final String [] splitLines(String s) {
78 if (s == null) {
79 return null;
80 }
81 ArrayList<String> list = new ArrayList<String>();
82
83 BufferedReader in = null;
84
85 try {
86 in =
87 new BufferedReader(
88 new StringReader(s));
89
90 String line;
91
92 while ((line = in.readLine()) != null) {
93 list.add(line);
94 }
95 }
96 catch (IOException ioe) {
97 return null;
98 }
99 finally {
100 if (in != null)
101 try {
102 in.close();
103 }
104 catch (IOException ioe) {}
105 }
106
107 return list.toArray(new String[list.size()]);
108 }
109
110 public static final String concat(String [] s) {
111 return concat(s, null);
112 }
113
114 public static final String concat(String [] s, String glue) {
115 if (s == null) {
116 return null;
117 }
118 StringBuilder sb = new StringBuilder();
119 for (int i = 0; i < s.length; ++i) {
120 if (i > 0 && glue != null) {
121 sb.append(glue);
122 }
123 sb.append(s[i]);
124 }
125 return sb.toString();
126 }
127
128 public static final String [] splitAfter(String [] src, int N) {
129 if (src == null) {
130 return null;
131 }
132
133 ArrayList<String> list = new ArrayList<String>(src.length);
134 for (int i = 0; i < src.length; ++i) {
135 String s = src[i];
136 int R;
137 if (s == null || (R = s.length()) == 0) {
138 list.add(s);
139 }
140 else {
141 while (R > N) {
142 list.add(s.substring(0, N));
143 s = s.substring(N);
144 R = s.length();
145 }
146 list.add(s);
147 }
148 }
149 return list.toArray(new String[list.size()]);
150 }
151
152 public static final String [] splitQuoted(String s) {
153 return splitQuoted(s, '"');
154 }
155
156 public static final String[] fitArray(String [] src, String [] dst) {
157 if (src == null) {
158 return dst;
159 }
160 if (dst == null) {
161 return src;
162 }
163
164 if (src.length == dst.length) {
165 return src;
166 }
167
168 System.arraycopy(src, 0, dst, 0, Math.min(dst.length, src.length));
169
170 return dst;
171 }
172
173 public static final String [] splitQuoted(String s, char quoteChar) {
174 if (s == null) {
175 return null;
176 }
177 ArrayList<String> l = new ArrayList<String>();
178 int mode = 0, last_mode = 0;
179 StringBuilder sb = new StringBuilder();
180 for (int N = s.length(), i = 0; i < N; ++i) {
181 char c = s.charAt(i);
182 switch (mode) {
183 case 0: // unquoted mode
184 if (c == quoteChar) {
185 mode = 1; // to quoted mode
186 if (sb.length() > 0) {
187 l.add(sb.toString());
188 sb.setLength(0);
189 }
190 }
191 else if (c == '\\') {
192 last_mode = 0;
193 mode = 2; // escape mode
194 }
195 else if (!Character.isWhitespace(c)) {
196 sb.append(c);
197 }
198 else if (sb.length() > 0) {
199 l.add(sb.toString());
200 sb.setLength(0);
201 }
202 break;
203 case 1: // quote mode
204 if (c == '\\') {
205 last_mode = 1;
206 mode = 2; // escape mode
207 }
208 else if (c == quoteChar) { // leave quote mode
209 l.add(sb.toString());
210 sb.setLength(0);
211 mode = 0; // to unquoted mode
212 }
213 else {
214 sb.append(c);
215 }
216 break;
217 case 2: // escape mode
218 sb.append(c);
219 mode = last_mode;
220 break;
221 }
222 }
223 if (sb.length() > 0) {
224 l.add(sb.toString());
225 }
226 return l.toArray(new String[l.size()]);
227 }
228
229 public static final String [] splitUnique(String s) {
230 return splitUnique(s, "[\\s,]+");
231 }
232
233 public static final String [] splitUnique(String s, String sep) {
234 return s != null ? unique(s.split(sep)) : null;
235 }
236
237 public static final String [] unique(String [] str) {
238 if (str == null || str.length == 1) {
239 return str;
240 }
241
242 Arrays.sort(str);
243
244 for (int i = 1; i < str.length; ++i)
245 if (str[i].equals(str[i-1])) {
246 ArrayList<String> list = new ArrayList<String>(str.length);
247
248 for (int j = 0; j < i; ++j) {
249 list.add(str[j]);
250 }
251
252 String last = str[i];
253
254 for (++i; i < str.length; ++i)
255 if (!last.equals(str[i])) {
256 list.add(last = str[i]);
257 }
258
259 return list.toArray(new String[list.size()]);
260 }
261
262 return str;
263 }
264
265 public static final String [] ensureEmptyExistence(String [] str) {
266 if (str == null) {
267 return null;
268 }
269
270 for (int i = 0; i < str.length; ++i)
271 if (str[i].length() == 0) {
272 if (i != 0) { // copy to front
273 String t = str[0];
274 str[0] = str[i];
275 str[i] = t;
276 }
277 return str;
278 }
279
280 String [] n = new String[str.length+1];
281 n[0] = "";
282 System.arraycopy(str, 0, n, 1, str.length);
283 return n;
284 }
285
286 public static final String ensureWidthPadLeft(String s, int width, char pad) {
287 int N = s.length();
288 if (N >= width) {
289 return s;
290 }
291 StringBuilder sb = new StringBuilder(width);
292 for (; N < width; ++N) {
293 sb.append(pad);
294 }
295 sb.append(s);
296 return sb.toString();
297 }
298
299 public static final String [] splitWhiteSpaceWithNAsPad(
300 String s,
301 int N,
302 String pad
303 ) {
304 if (s == null) {
305 return null;
306 }
307
308 boolean copyChars = true;
309 int count = 0; // number of WS
310
311 int S = s.length();
312
313 ArrayList<String> parts = new ArrayList<String>();
314
315 StringBuilder part = new StringBuilder(S);
316
317 for (int i = 0; i < S; ++i) {
318 char c = s.charAt(i);
319 if (copyChars) { // char mode
320 if (Character.isWhitespace(c)) {
321 if (part.length() > 0) {
322 parts.add(part.toString());
323 part.setLength(0);
324 }
325 count = 1;
326 copyChars = false; // to WS mode
327 }
328 else {
329 part.append(c);
330 }
331 }
332 else { // counting WS
333 if (Character.isWhitespace(c)) {
334 ++count;
335 }
336 else {
337 while (count >= N) {// enough to insert pad?
338 parts.add(pad);
339 count -= N;
340 }
341 part.append(c);
342 count = 0;
343 copyChars = true; // back to char mode
344 }
345 }
346 } // for all chars
347
348 if (copyChars) {
349 if (part.length() > 0) {
350 parts.add(part.toString());
351 }
352 }
353 else {
354 while (count >= N) { // enough to insert pad?
355 parts.add(pad);
356 count -= N;
357 }
358 }
359
360 return parts.toArray(new String[parts.size()]);
361 }
362
363 public static final String encodeURL(String url) {
364 try {
365 return url != null
366 ? URLEncoder.encode(url, "UTF-8")
367 : "";
368 }
369 catch (UnsupportedEncodingException usee) {
370 throw new RuntimeException(usee.getLocalizedMessage());
371 }
372 }
373
374 public static final String decodeURL(String url) {
375 try {
376 return url != null
377 ? URLDecoder.decode(url, "UTF-8")
378 : "";
379 }
380 catch (UnsupportedEncodingException usee) {
381 throw new RuntimeException(usee.getLocalizedMessage());
382 }
383 }
384
385 public static final boolean isEmpty(String s) {
386 return s == null || s.length() == 0;
387 }
388
389 public static final String empty(String s) {
390 return s == null ? "" : s;
391 }
392
393
394 public static final String trim(String s) {
395 return s != null ? s.trim() : null;
396 }
397
398 public static final String uniqueWhitespaces(String s) {
399 if (s == null) {
400 return null;
401 }
402
403 boolean wasWS = false;
404 StringBuilder sb = new StringBuilder();
405
406 for (int N = s.length(), i = 0; i < N; ++i) {
407 char c = s.charAt(i);
408 if (Character.isWhitespace(c)) {
409 if (!wasWS) {
410 sb.append(c);
411 wasWS = true;
412 }
413 }
414 else {
415 sb.append(c);
416 wasWS = false;
417 }
418 }
419
420 return sb.toString();
421 }
422
423 public static final String replaceNewlines(String s) {
424 return s == null
425 ? null
426 : s.replace('\r', ' ').replace('\n', ' ');
427 }
428
429 /*
430 public static final String quoteReplacement(String s) {
431
432 if (s == null || (s.indexOf('\\') == -1 && s.indexOf('$') == -1))
433 return s;
434
435 StringBuilder sb = new StringBuilder();
436
437 for (int N = s.length(), i = 0; i < N; ++i) {
438 char c = s.charAt(i);
439 if (c == '\\' || c == '$') sb.append('\\');
440 sb.append(c);
441 }
442
443 return sb.toString();
444 }
445 */
446
447 public static final String quoteReplacement(String s) {
448
449 if (s == null) {
450 return null;
451 }
452
453 for (int N = s.length(), i = 0; i < N; ++i) { // plain check loop
454 char c = s.charAt(i);
455 if (c == '$' || c == '\\') { // first special -> StringBuilder
456 StringBuilder sb = new StringBuilder(s.substring(0, i))
457 .append('\\')
458 .append(c);
459 for (++i; i < N; ++i) { // build StringBuilder with rest
460 if ((c = s.charAt(i)) == '$' || c == '\\') {
461 sb.append('\\');
462 }
463 sb.append(c);
464 }
465 return sb.toString();
466 }
467 }
468
469 return s;
470 }
471
472 public static final String repeat(String what, int times) {
473 return repeat(what, times, new StringBuilder()).toString();
474 }
475
476 public static final StringBuilder repeat(String what, int times, StringBuilder sb) {
477 while (times-- > 0) {
478 sb.append(what);
479 }
480 return sb;
481 }
482
483 /**
484 * Gibt den Dateinamen in S ohne Dateiendung zurück.
485 */
486 public static final String cutExtension(String s) {
487 if (s == null) {
488 return null;
489 }
490 int dot = s.lastIndexOf('.');
491 return dot >= 0
492 ? s.substring(0, dot)
493 : s;
494 }
495
496 public static final String extension(String s) {
497 if (s == null) {
498 return null;
499 }
500 int dot = s.lastIndexOf('.');
501 return dot >= 0
502 ? s.substring(dot+1)
503 : s;
504 }
505
506 public static final String [] splitExtension(String x) {
507 if (x == null) {
508 return null;
509 }
510 int i = x.lastIndexOf('.');
511 return i < 0
512 ? new String[] { x, null }
513 : new String[] { x.substring(0, Math.max(0, i)), x.substring(i+1).toLowerCase() };
514 }
515
516 public static String entityEncode(String s) {
517 if (s == null || s.length() == 0) {
518 return s;
519 }
520
521 StringBuilder sb = new StringBuilder();
522 for (int i=0, N =s.length(); i < N; i++) {
523 char c = s.charAt(i);
524 switch (c) {
525 case '<':
526 sb.append("&lt;");
527 break;
528 case '>':
529 sb.append("&gt;");
530 break;
531 case '&':
532 sb.append("&amp;");
533 break;
534 default:
535 sb.append(c);
536 }
537 }
538 return sb.toString();
539 }
540
541 public static String entityDecode(String s) {
542 if (s == null || s.length() == 0) {
543 return s;
544 }
545
546 boolean amp = false;
547 StringBuilder sb = new StringBuilder();
548 StringBuilder ampbuf = new StringBuilder();
549 for (int i=0, N =s.length(); i < N; i++) {
550 char c = s.charAt(i);
551 if (amp) {
552 if (c == ';') {
553 amp = false;
554 String str = ampbuf.toString();
555 ampbuf.setLength(0);
556 if (str.equals("lt")) {
557 sb.append('<');
558 }
559 else if (str.equals("gt")) {
560 sb.append('>');
561 }
562 else if (str.equals("amp")) {
563 sb.append('&');
564 }
565 else {
566 sb.append('&').append(str).append(';');
567 }
568 }
569 else {
570 ampbuf.append(c);
571 }
572 }
573 else if (c=='&') {
574 amp = true;
575 }
576 else {
577 sb.append(c);
578 }
579
580 }
581 return sb.toString();
582 }
583
584 public static final String quote(String s) {
585 return quote(s, '"');
586 }
587
588 public static final String quote(String s, char quoteChar) {
589 if (s == null) {
590 return null;
591 }
592
593 int N = s.length();
594
595 if (N == 0)
596 return new StringBuilder(2)
597 .append(quoteChar)
598 .append(quoteChar)
599 .toString();
600
601 StringBuilder sb = null;
602
603 int i = 0;
604
605 for (; i < N; ++i) {
606 char c = s.charAt(i);
607
608 if (Character.isWhitespace(c)) {
609 sb = new StringBuilder()
610 .append(quoteChar)
611 .append(s.substring(0, i+1));
612 break;
613 }
614 else if (c == quoteChar) {
615 sb = new StringBuilder()
616 .append(quoteChar)
617 .append(s.substring(0, i))
618 .append('\\')
619 .append(quoteChar);
620 break;
621 }
622 }
623
624 if (sb == null) {
625 return s;
626 }
627
628 for (++i; i < N; ++i) {
629 char c = s.charAt(i);
630 if (c == quoteChar || c == '\\') {
631 sb.append('\\');
632 }
633
634 sb.append(c);
635 }
636
637 return sb.append(quoteChar).toString();
638 }
639
640 /*
641 public static String sprintf(String format, Object... args) {
642 return sprintf(null, format, args);
643 }
644 */
645
646 public static String sprintf(Locale locale, String format, Object ... args) {
647 StringWriter sw = new StringWriter();
648 PrintWriter pw = new PrintWriter(sw);
649 pw.printf(locale, format, args);
650 pw.flush();
651 return sw.toString();
652 }
653
654
655 public static void testQuote() {
656 System.err.println("testing quote:");
657
658 String cases [] = {
659 "", "''",
660 "test", "test",
661 "test test", "'test test'",
662 " test", "' test'",
663 "test ", "'test '",
664 " test ", "' test '",
665 "'test", "'\\'test'",
666 "'", "'\\''",
667 " ' ' ", "' \\' \\' '",
668 "te'st", "'te\\'st'"
669 };
670
671 int failed = 0;
672
673 for (int i = 0; i < cases.length; i += 2) {
674 String in = cases[i];
675 String out = cases[i+1];
676
677 String res = quote(in, '\'');
678 if (!res.equals(out)) {
679 ++failed;
680 System.err.println(
681 "quote failed on: >" + in +
682 "< result: >" + res +
683 "< expected: >" + out + "<");
684 }
685 }
686
687 int T = cases.length/2;
688
689 System.err.println("tests total: " + T);
690 System.err.println("tests failed: " + failed);
691 System.err.println("tests passed: " + (T - failed));
692 }
693
694 public static void testQuoteReplacement() {
695 System.err.println("testing quoteReplacement:");
696
697 String cases [] = {
698 "", "",
699 "test", "test",
700 "$", "\\$",
701 "\\", "\\\\",
702 "\\$", "\\\\\\$",
703 "test\\$", "test\\\\\\$",
704 "\\test", "\\\\test",
705 "test$", "test\\$",
706 "test$test", "test\\$test",
707 "$test$", "\\$test\\$"
708 };
709
710 int failed = 0;
711
712 for (int i = 0; i < cases.length; i += 2) {
713 String in = cases[i];
714 String out = cases[i+1];
715
716 String res = quoteReplacement(in);
717 if (!res.equals(out)) {
718 ++failed;
719 System.err.println(
720 "quoteReplacement failed on: '" + in +
721 "' result: '" + res +
722 "' expected: '" + out + "'");
723 }
724 }
725
726 int T = cases.length/2;
727
728 System.err.println("tests total: " + T);
729 System.err.println("tests failed: " + failed);
730 System.err.println("tests passed: " + (T - failed));
731 }
732
733 public static void testStringArray2D() {
734 int total = 0;
735 int fail = 0;
736 int passed = 0;
737
738 System.err.println("testing StringArray2D:");
739
740 double[][] testarray = {{1.0, 2.0, 3.0},
741 {1.1, 2.1, 3.1},
742 {100.2, 200.2}
743 };
744 String str = double2DArrayToString(testarray);
745
746 total += 1;
747 if (str.equals("1.0;2.0;3.0:1.1;2.1;3.1:100.2;200.2")) {
748 passed +=1;
749 }
750 else {
751 fail +=1;
752 System.err.println("Der Ergebnis-String ist nicht richtig:");
753 System.err.println(str);
754 }
755
756
757
758 double[][] testarray2 = stringToDouble2DArray(str);
759 boolean failed = false;
760
761 total +=1;
762 for (int i=0; i < testarray.length; i++)
763 for (int j=0; j < testarray[i].length; j++)
764 if (testarray[i][j] != testarray2[i][j]) {
765 System.err.println("Test scheitert bei i=" +i +" j=" +j);
766 System.err.println("alter Wert=" + testarray[i][j] +" neuer Wert=" +testarray2[i][j]);
767 failed = true;
768 }
769 if (failed) {
770 fail +=1;
771 }
772 else {
773 passed +=1;
774 }
775 System.err.println("tests total: "+ total);
776 System.err.println("tests failed: "+ fail);
777 System.err.println("tests passed: "+ passed);
778 }
779
780 public static void main(String [] args) {
781
782 testQuoteReplacement();
783 testQuote();
784 testStringArray2D();
785 }
786 }
787 // end of file
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