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1
9 package com.vladium.util;
10
11 import java.io.File  ;
12 import java.io.IOException ;
13 import java.util.ArrayList ;
14 import java.util.HashSet ;
15 import java.util.List ;
16 import java.util.Set ;
17 import java.util.StringTokenizer ;
18
19
23 public
24 abstract class Strings
25 {
26
28
29 public static final String WHITE_SPACE = " \t\r\n";
30
31
32 public static String toListForm (final String [] strings, final char delimiter)
34 {
35 if (strings == null) return null;
36 if (strings.length == 0) return "";
37
38 final StringBuffer s = new StringBuffer ();
39 for (int i = 0, iLimit = strings.length; i < iLimit; ++ i)
40 {
41 if (i != 0) s.append (delimiter);
42 s.append (strings [i]);
43 }
44
45 return s.toString ();
46 }
47
48 public static String [] removeDuplicates (final String [] strings, final boolean removeNull)
49 {
50 if (strings == null) return strings;
51
52 final int length = strings.length;
53 if (length == 0) return strings;
54
55 final Set _strings = new HashSet (length);
56 final List _result = new ArrayList (length);
57
58 for (int i = 0; i < length; ++ i)
59 {
60 final String s = strings [i];
61 if (removeNull && (s == null)) continue;
62
63 if (_strings.add (s)) _result.add (s);
64 }
65
66 final int resultLength = _result.size ();
67 if (resultLength == length)
68 return strings;
69 else
70 {
71 final String [] result = new String [resultLength];
72 _result.toArray (result);
73
74 return result;
75 }
76 }
77
78
86 public static String [] merge (final String [] strings, final String delimiters, final boolean removeNull)
87 {
88 if (strings == null) return strings;
89
90 final int length = strings.length;
91 if (length == 0) return strings;
92
93 if ((delimiters == null) || (delimiters.length () == 0))
94 throw new IllegalArgumentException ("null/empty input: delimiters");
95
96 final Set _strings = new HashSet (length);
97 final List _result = new ArrayList (length);
98
99 for (int i = 0; i < length; ++ i)
100 {
101 final String s = strings [i];
102 if (removeNull && (s == null)) continue;
103
104 final StringTokenizer tokenizer = new StringTokenizer (s, delimiters);
105 while (tokenizer.hasMoreTokens ())
106 {
107 final String ss = tokenizer.nextToken ();
108 if (_strings.add (ss)) _result.add (ss);
109 }
110 }
111
112 final String [] result = new String [_result.size ()];
113 _result.toArray (result);
114
115 return result;
116 }
117
118
126 public static String [] mergeAT (final String [] strings, final String delimiters, final boolean processAtFiles)
127 throws IOException
128 {
129 if (! processAtFiles)
130 return merge (strings, delimiters, true);
131 else
132 {
133 if (strings == null) return strings;
134
135 final int length = strings.length;
136 if (length == 0) return strings;
137
138 if ((delimiters == null) || (delimiters.length () == 0))
139 throw new IllegalArgumentException ("null/empty input: delimiters");
140
141 final Set _strings = new HashSet (length);
142 final List _result = new ArrayList (length);
143
144 for (int i = 0; i < length; ++ i)
145 {
146 final String s = strings [i];
147 if (s == null) continue;
148
149 final StringTokenizer tokenizer = new StringTokenizer (s, delimiters);
150 while (tokenizer.hasMoreTokens ())
151 {
152 final String ss = tokenizer.nextToken ();
153
154 if (ss.startsWith ("@"))
155 {
156 final String [] fileList = Files.readFileList (new File (ss.substring (1)));
157 for (int j = 0; j < fileList.length; ++ j)
158 {
159 final String sss = fileList [j];
160 if (_strings.add (sss)) _result.add (sss);
161 }
162 }
163 else if (_strings.add (ss)) _result.add (ss);
164 }
165 }
166
167 final String [] result = new String [_result.size ()];
168 _result.toArray (result);
169
170 return result;
171 }
172 }
173
174
180 public static void HTMLEscape (final String s, final StringBuffer append)
181 {
182 if (s == null) throw new IllegalArgumentException ("null input: s");
183 if (append == null) throw new IllegalArgumentException ("null input: append");
184
185 final char [] chars;
186 if (USE_GET_CHARS) chars = s.toCharArray ();
187
188 for (int i = 0, iLimit = s.length (); i < iLimit; ++ i)
189 {
190 final char c = USE_GET_CHARS ? chars [i] : s.charAt (i);
191
192 switch (c)
193 {
194 case '<':
195 append.append ("<");
196 break;
197
198 case '>':
199 append.append (">");
200 break;
201
202 case '"':
203 append.append (""");
204 break;
205
206 case '&':
207 append.append ("&");
208 break;
209
210 default:
211 append.append (c);
212
213 } }
215 }
216
217
221 public static void HTMLEscapeNB (final String s, final StringBuffer append)
222 {
223 if (s == null) throw new IllegalArgumentException ("null input: s");
224 if (append == null) throw new IllegalArgumentException ("null input: append");
225
226 final char [] chars;
227 if (USE_GET_CHARS) chars = s.toCharArray ();
228
229 for (int i = 0, iLimit = s.length (); i < iLimit; ++ i)
230 {
231 final char c = USE_GET_CHARS ? chars [i] : s.charAt (i);
232
233 switch (c)
234 {
235 case ' ':
236 append.append ('\u00A0'); break;
238
239 case '\t':
240 append.append ("\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0"); break;
242
243
247 case '<':
248 append.append ("<");
249 break;
250
251 case '>':
252 append.append (">");
253 break;
254
255 case '"':
256 append.append (""");
257 break;
258
259 case '&':
260 append.append ("&");
261 break;
262
263 default:
264 append.append (c);
265
266 } }
268 }
269
270 public static String HTMLEscape (final String s)
271 {
272 final StringBuffer buf = new StringBuffer ();
273 HTMLEscape (s, buf);
274
275 return buf.toString ();
276 }
277
278 public static String HTMLEscapeSP (final String s)
279 {
280 final StringBuffer buf = new StringBuffer ();
281 HTMLEscapeNB (s, buf);
282
283 return buf.toString ();
284 }
285
286
288
290
292
293 private Strings () {}
295
296 private static final boolean USE_GET_CHARS = true;
297
298 } |
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