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1
30 package com.genimen.djeneric.util;
31
32 public class DjString
33 {
34 static public final String  WHITESPACE = " \t\r\n";
35
36 static public final String reverse(String p_string)
37 {
38 StringBuffer arg = new StringBuffer (p_string);
39 return reverse(arg).toString();
40 }
41
42 static public final StringBuffer reverse(StringBuffer p_string)
43 {
44 return p_string.reverse();
45 }
46
47 static public final String left(String p_string, int p_len)
48 {
49 return p_string.length() > p_len ? p_string.substring(0, p_len) : p_string;
50 }
51
52 static public final String right(String p_string, int p_len)
53 {
54 return p_string.length() > p_len ? p_string.substring(p_string.length() - p_len) : p_string;
55 }
56
57 static public final String strip(String p_stringToStrip, String p_sepChars)
58 {
59 StringBuffer arg = new StringBuffer (p_stringToStrip);
60 strip(arg, p_sepChars);
61 return arg.toString();
62 }
63
64 static public final String strip(String p_toStrip)
65 {
66 return (strip(p_toStrip, WHITESPACE));
67 }
68
69 static public final String stripLeft(String p_stringToStrip, String p_sepChars)
70 {
71 StringBuffer arg = new StringBuffer (p_stringToStrip);
72 stripLeft(arg, p_sepChars);
73 return arg.toString();
74 }
75
76 static public final String stripLeft(String p_toStrip)
77 {
78 return (stripLeft(p_toStrip, WHITESPACE));
79 }
80
81 static public final String stripRight(String p_stringToStrip, String p_sepChars)
82 {
83 StringBuffer arg = new StringBuffer (p_stringToStrip);
84 stripRight(arg, p_sepChars);
85 return arg.toString();
86 }
87
88 static public final String stripRight(String p_toStrip)
89 {
90 return (stripRight(p_toStrip, WHITESPACE));
91 }
92
93 static public final String appendToLength(String p_original, String p_toAppend, int len)
94 {
95 if (p_toAppend == null || p_toAppend.length() == 0) throw new RuntimeException ("append string is empty");
96 StringBuffer arg = new StringBuffer (p_original);
97 appendToLength(arg, p_toAppend, len);
98 return arg.toString();
99 }
100
101 static public final StringBuffer strip(StringBuffer p_toStrip, String p_sepChars)
102 {
103 stripLeft(p_toStrip, p_sepChars);
104 stripRight(p_toStrip, p_sepChars);
105 return (p_toStrip);
106 }
107
108 static public final StringBuffer stripLeft(StringBuffer p_toStrip, String p_sepChars)
109 {
110 int i = 0;
111 while (i < p_toStrip.length() && p_sepChars.indexOf(p_toStrip.charAt(i)) != -1)
112 {
113 i++;
114 }
115 if (i > 0)
116 {
117 String sres = new String (p_toStrip.toString().substring(i));
118 p_toStrip.setLength(0);
119 p_toStrip.append(sres);
120 }
121 return (p_toStrip);
122 }
123
124 static public final StringBuffer stripRight(StringBuffer p_toStrip, String p_sepChars)
125 {
126 p_toStrip.reverse();
127 stripLeft(p_toStrip, p_sepChars);
128 p_toStrip.reverse();
129 return (p_toStrip);
130 }
131
132 static public final StringBuffer stripRight(StringBuffer p_toStrip)
133 {
134 return (stripRight(p_toStrip, WHITESPACE));
135 }
136
137 static public final StringBuffer stripLeft(StringBuffer p_toStrip)
138 {
139 return (stripLeft(p_toStrip, WHITESPACE));
140 }
141
142 static public final StringBuffer appendToLength(StringBuffer p_original, String p_toAppend, int len)
143 { while (p_original.length() < len)
145 {
146 p_original.append(p_toAppend);
147 }
148 p_original.setLength(len);
149 return (p_original);
150 }
151
152 static public final StringBuffer left(StringBuffer p_string, int p_len)
153 {
154 if (p_string.length() > p_len) p_string.setLength(p_len);
155 return (p_string);
156 }
157
158 static public final StringBuffer right(StringBuffer p_string, int p_len)
159 {
160 if (p_string.length() > p_len)
161 {
162 p_string.reverse();
163 p_string.setLength(p_len);
164 p_string.reverse();
165 }
166 return (p_string);
167 }
168
169 static public final String initCapNoLowerCase(String src)
170 {
171 if ((src == null) || (src.length() == 0)) return src;
172 StringBuffer sb = new StringBuffer (src);
173 sb.setCharAt(0, sb.substring(0, 1).toUpperCase().charAt(0));
174 for (int i = 0; i < sb.length(); i++)
175 {
176 if (i > 0)
177 {
178 if ((sb.charAt(i - 1) == ' ') || (sb.charAt(i - 1) == '_'))
179 {
180 sb.setCharAt(i, sb.substring(i, i + 1).toUpperCase().charAt(0));
181 }
182 }
183 }
184 return new String (sb);
185 }
186
187 static public final String initCap(String src)
188 {
189 return initCapNoLowerCase(src.toLowerCase());
190 }
191
192 static public final String getNextLine(StringBuffer srcBuf)
193 {
194 if ((srcBuf == null) || (srcBuf.length() == 0)) return (null);
195 String src = srcBuf.toString();
196 String result = null;
197 int offset = src.indexOf("\n");
198 if (offset >= 0)
199 {
200 result = srcBuf.substring(0, offset + 1);
201 srcBuf.delete(0, offset + 1);
202 }
203 else
204 {
205 result = srcBuf.toString();
206 srcBuf.setLength(0);
207 }
208 return (result);
209 }
210
211 public static final String getNextParam(StringBuffer srcBuf, String separator, char quoteChar, char escapeChar)
212 {
213 if ((srcBuf == null) || (srcBuf.length() == 0)) return (null);
214 String src = srcBuf.toString();
215 src = wipeConstantText(src, quoteChar, escapeChar, ' ');
216 String result = null;
217 int offset = src.indexOf(separator);
218 if (offset >= 0)
219 {
220 result = srcBuf.substring(0, offset);
221 srcBuf.delete(0, offset + separator.length());
222 }
223 else
224 {
225 result = srcBuf.toString();
226 srcBuf.setLength(0);
227 }
228 DjStringReplacer sr = new DjStringReplacer(result);
229 result = sr.replace("" + escapeChar + "" + quoteChar, "" + quoteChar, true); result = sr.replace("" + escapeChar + "" + escapeChar, "" + escapeChar, true); return (result);
236 }
237
238 public static final String replace(String srcBuf, String fromStr, String toStr)
239 {
240 DjStringReplacer sr = new DjStringReplacer(srcBuf);
241 return sr.replace(fromStr, toStr);
242 }
243
244 public static final String replace(String srcBuf, String fromStr, String toStr, boolean caseSensitive)
245 {
246 DjStringReplacer sr = new DjStringReplacer(srcBuf);
247 return sr.replace(fromStr, toStr, caseSensitive);
248 }
249
250 public static final String makeTitle(String srcBuf)
251 {
252 return replace(initCap(srcBuf), "_", " ");
253 }
254
255 static private final String _valids = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_";
256
257 public static final String makeClassName(String srcBuf)
258 {
259 StringBuffer sb = new StringBuffer (srcBuf);
260 for (int i = 0; i < sb.length(); i++)
261 {
262 if (_valids.indexOf(sb.charAt(i)) == -1) sb.replace(i, i + 1, "_");
263 }
264 return replace(replace(initCapNoLowerCase(sb.toString()), "_", ""), " ", "");
265 }
266
267 public static String stripPackagePrefixFromClassName(String cls)
268 {
269 String result = cls;
270 cls = DjString.reverse(cls);
271 int offs = cls.indexOf(".");
272 if (offs != -1)
273 {
274 result = DjString.reverse(cls.substring(0, offs));
275 }
276 return result;
277 }
278
279 public static String stripFromBegin(String str, String what)
280 {
281 if (str.trim().toUpperCase().startsWith(what.toUpperCase()))
282 {
283 str = str.trim().substring(what.length()).trim();
284 }
285 return str;
286 }
287
288 public static boolean isEmpty(String str)
290 {
291 if (str == null) return true;
292 if (str.trim().length() == 0) return true;
293 return false;
294 }
295
296 public static String wipeConstantText(String src, char textMarker, char escapeChar, char wipeChar)
297 {
298 int offset = 0;
299 int len = src.length();
300 boolean inText = false;
301 int inc;
302 char[] ca = (src + " ").toCharArray();
305
309 while (offset < len)
310 {
311 inc = 1;
312 if (inText)
313 {
314 if (ca[offset] == escapeChar && ca[offset + 1] == textMarker)
315 {
317 inc = 2;
318 }
319 else if (ca[offset] == textMarker)
320 {
321 ca[offset] = ' ';
322 inText = false;
323 }
324 }
325 else
326 {
328 if (ca[offset] == textMarker) inText = true;
329 }
330 if (inText)
331 {
332 ca[offset] = ' ';
333 if (inc != 1) ca[offset + 1] = ' ';
334 }
335 if (!inText)
336 {
337 offset = src.indexOf(textMarker, offset + inc);
338 if (offset == -1) offset = len;
339 }
340 else offset += inc;
341 }
342 return new String (ca);
343 }
344
345 public static boolean isValidInteger(String str)
346 {
347 try
348 {
349 Integer.parseInt(str);
350 return true;
351 }
352 catch (Exception x)
353 {
354 DjLogger.log(x);
355 }
356 return false; }
358
359 public static int safeCompare(Object one, Object two)
360 {
361 if (one == null && two == null) return 0;
362 if (one == null) return -1;
363 if (two == null) return 1;
364 return one.toString().toLowerCase().compareTo(two.toString().toLowerCase());
365 }
366
367 public static String indentString(String val, int ind)
368 {
369 if (ind == 0) return val;
370
371 StringBuffer result = new StringBuffer (val);
372
373 if (ind > 0)
374 {
375 for (int x = 0; x < ind; x++)
376 result.insert(0, ' ');
377 int i = 0;
378 while (i < result.length())
379 {
380 if (i < result.length() - 1 && result.charAt(i) == '\n' && result.charAt(i + 1) != '\n')
381 {
382 for (int x = 0; x < ind; x++)
383 result.insert(i + 1, ' ');
384 i += ind;
385 }
386 i++;
387 }
388 }
389 if (ind < 0)
390 {
391 ind = -ind;
392 for (int d = 0; d < ind; d++)
393 if (result.charAt(0) == ' ') result.deleteCharAt(0);
394 int i = 0;
395 while (i < result.length())
396 {
397 if (i < result.length() - 1 && result.charAt(i) == '\n' && result.charAt(i + 1) != '\n')
398 {
399 int end = i + ind;
400 if (end > result.length()) end = result.length();
401 for (int d = i; d < end; d++)
402 if (result.charAt(i + 1) == ' ') result.deleteCharAt(i + 1);
403 }
404 i++;
405 }
406 }
407 return result.toString();
408 }
409 } |
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