source: josm/trunk/src/org/openstreetmap/josm/data/validation/util/Entities.java

Last change on this file was 10214, checked in by Don-vip, 10 years ago

findbugs - SE_BAD_FIELD_STORE + LI_LAZY_INIT_UPDATE_STATIC
  • Property svn:eol-style set to native
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Line 
1/*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18/* Taken from: http://svn.apache.org/viewvc/commons/proper/lang/trunk/src/java/org/apache/commons/lang/Entities.java?revision=636641 */
19package org.openstreetmap.josm.data.validation.util;
20
21import java.util.HashMap;
22import java.util.Map;
23
24/**
25 * <p>
26 * Provides HTML and XML entity utilities.
27 * </p>
28 * @see <a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character Entities for ISO Latin-1</a>
29 * @see <a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0 Character entity references</a>
30 * @see <a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01 Character References</a>
31 * @see <a href="http://www.w3.org/TR/html401/charset.html#code-position">HTML 4.01 Code positions</a>
32 * @since 3669
33 */
34public final class Entities {
35 private static final String[][] ARRAY = {
36 /* BASIC */
37 {"quot", "34"}, // " - double-quote
38 {"amp", "38"}, // & - ampersand
39 {"lt", "60"}, // < - less-than
40 {"gt", "62"}, // > - greater-than
41 /* XML */
42 {"apos", "39"}, // XML apostrophe
43 /* ISO8859_1 */
44 {"nbsp", "160"}, // non-breaking space
45 {"iexcl", "161"}, // inverted exclamation mark
46 {"cent", "162"}, // cent sign
47 {"pound", "163"}, // pound sign
48 {"curren", "164"}, // currency sign
49 {"yen", "165"}, // yen sign = yuan sign
50 {"brvbar", "166"}, // broken bar = broken vertical bar
51 {"sect", "167"}, // section sign
52 {"uml", "168"}, // diaeresis = spacing diaeresis
53 {"copy", "169"}, // © - copyright sign
54 {"ordf", "170"}, // feminine ordinal indicator
55 {"laquo", "171"}, // left-pointing double angle quotation mark = left pointing guillemet
56 {"not", "172"}, // not sign
57 {"shy", "173"}, // soft hyphen = discretionary hyphen
58 {"reg", "174"}, // ® - registered trademark sign
59 {"macr", "175"}, // macron = spacing macron = overline = APL overbar
60 {"deg", "176"}, // degree sign
61 {"plusmn", "177"}, // plus-minus sign = plus-or-minus sign
62 {"sup2", "178"}, // superscript two = superscript digit two = squared
63 {"sup3", "179"}, // superscript three = superscript digit three = cubed
64 {"acute", "180"}, // acute accent = spacing acute
65 {"micro", "181"}, // micro sign
66 {"para", "182"}, // pilcrow sign = paragraph sign
67 {"middot", "183"}, // middle dot = Georgian comma = Greek middle dot
68 {"cedil", "184"}, // cedilla = spacing cedilla
69 {"sup1", "185"}, // superscript one = superscript digit one
70 {"ordm", "186"}, // masculine ordinal indicator
71 {"raquo", "187"}, // right-pointing double angle quotation mark = right pointing guillemet
72 {"frac14", "188"}, // vulgar fraction one quarter = fraction one quarter
73 {"frac12", "189"}, // vulgar fraction one half = fraction one half
74 {"frac34", "190"}, // vulgar fraction three quarters = fraction three quarters
75 {"iquest", "191"}, // inverted question mark = turned question mark
76 {"Agrave", "192"}, // À - uppercase A, grave accent
77 {"Aacute", "193"}, // Á - uppercase A, acute accent
78 {"Acirc", "194"}, // Â - uppercase A, circumflex accent
79 {"Atilde", "195"}, // Ã - uppercase A, tilde
80 {"Auml", "196"}, // Ä - uppercase A, umlaut
81 {"Aring", "197"}, // Å - uppercase A, ring
82 {"AElig", "198"}, // Æ - uppercase AE
83 {"Ccedil", "199"}, // Ç - uppercase C, cedilla
84 {"Egrave", "200"}, // È - uppercase E, grave accent
85 {"Eacute", "201"}, // É - uppercase E, acute accent
86 {"Ecirc", "202"}, // Ê - uppercase E, circumflex accent
87 {"Euml", "203"}, // Ë - uppercase E, umlaut
88 {"Igrave", "204"}, // Ì - uppercase I, grave accent
89 {"Iacute", "205"}, // Í - uppercase I, acute accent
90 {"Icirc", "206"}, // Î - uppercase I, circumflex accent
91 {"Iuml", "207"}, // Ï - uppercase I, umlaut
92 {"ETH", "208"}, // Ð - uppercase Eth, Icelandic
93 {"Ntilde", "209"}, // Ñ - uppercase N, tilde
94 {"Ograve", "210"}, // Ò - uppercase O, grave accent
95 {"Oacute", "211"}, // Ó - uppercase O, acute accent
96 {"Ocirc", "212"}, // Ô - uppercase O, circumflex accent
97 {"Otilde", "213"}, // Õ - uppercase O, tilde
98 {"Ouml", "214"}, // Ö - uppercase O, umlaut
99 {"times", "215"}, // multiplication sign
100 {"Oslash", "216"}, // Ø - uppercase O, slash
101 {"Ugrave", "217"}, // Ù - uppercase U, grave accent
102 {"Uacute", "218"}, // Ú - uppercase U, acute accent
103 {"Ucirc", "219"}, // Û - uppercase U, circumflex accent
104 {"Uuml", "220"}, // Ü - uppercase U, umlaut
105 {"Yacute", "221"}, // Ý - uppercase Y, acute accent
106 {"THORN", "222"}, // Þ - uppercase THORN, Icelandic
107 {"szlig", "223"}, // ß - lowercase sharps, German
108 {"agrave", "224"}, // à - lowercase a, grave accent
109 {"aacute", "225"}, // á - lowercase a, acute accent
110 {"acirc", "226"}, // â - lowercase a, circumflex accent
111 {"atilde", "227"}, // ã - lowercase a, tilde
112 {"auml", "228"}, // ä - lowercase a, umlaut
113 {"aring", "229"}, // å - lowercase a, ring
114 {"aelig", "230"}, // æ - lowercase ae
115 {"ccedil", "231"}, // ç - lowercase c, cedilla
116 {"egrave", "232"}, // è - lowercase e, grave accent
117 {"eacute", "233"}, // é - lowercase e, acute accent
118 {"ecirc", "234"}, // ê - lowercase e, circumflex accent
119 {"euml", "235"}, // ë - lowercase e, umlaut
120 {"igrave", "236"}, // ì - lowercase i, grave accent
121 {"iacute", "237"}, // í - lowercase i, acute accent
122 {"icirc", "238"}, // î - lowercase i, circumflex accent
123 {"iuml", "239"}, // ï - lowercase i, umlaut
124 {"eth", "240"}, // ð - lowercase eth, Icelandic
125 {"ntilde", "241"}, // ñ - lowercase n, tilde
126 {"ograve", "242"}, // ò - lowercase o, grave accent
127 {"oacute", "243"}, // ó - lowercase o, acute accent
128 {"ocirc", "244"}, // ô - lowercase o, circumflex accent
129 {"otilde", "245"}, // õ - lowercase o, tilde
130 {"ouml", "246"}, // ö - lowercase o, umlaut
131 {"divide", "247"}, // division sign
132 {"oslash", "248"}, // ø - lowercase o, slash
133 {"ugrave", "249"}, // ù - lowercase u, grave accent
134 {"uacute", "250"}, // ú - lowercase u, acute accent
135 {"ucirc", "251"}, // û - lowercase u, circumflex accent
136 {"uuml", "252"}, // ü - lowercase u, umlaut
137 {"yacute", "253"}, // ý - lowercase y, acute accent
138 {"thorn", "254"}, // þ - lowercase thorn, Icelandic
139 {"yuml", "255"}, // ÿ - lowercase y, umlaut
140 /* HTML 40 */
141 // <!-- Latin Extended-B -->
142 {"fnof", "402"}, // latin small f with hook = function= florin, U+0192 ISOtech -->
143 // <!-- Greek -->
144 {"Alpha", "913"}, // greek capital letter alpha, U+0391 -->
145 {"Beta", "914"}, // greek capital letter beta, U+0392 -->
146 {"Gamma", "915"}, // greek capital letter gamma,U+0393 ISOgrk3 -->
147 {"Delta", "916"}, // greek capital letter delta,U+0394 ISOgrk3 -->
148 {"Epsilon", "917"}, // greek capital letter epsilon, U+0395 -->
149 {"Zeta", "918"}, // greek capital letter zeta, U+0396 -->
150 {"Eta", "919"}, // greek capital letter eta, U+0397 -->
151 {"Theta", "920"}, // greek capital letter theta,U+0398 ISOgrk3 -->
152 {"Iota", "921"}, // greek capital letter iota, U+0399 -->
153 {"Kappa", "922"}, // greek capital letter kappa, U+039A -->
154 {"Lambda", "923"}, // greek capital letter lambda,U+039B ISOgrk3 -->
155 {"Mu", "924"}, // greek capital letter mu, U+039C -->
156 {"Nu", "925"}, // greek capital letter nu, U+039D -->
157 {"Xi", "926"}, // greek capital letter xi, U+039E ISOgrk3 -->
158 {"Omicron", "927"}, // greek capital letter omicron, U+039F -->
159 {"Pi", "928"}, // greek capital letter pi, U+03A0 ISOgrk3 -->
160 {"Rho", "929"}, // greek capital letter rho, U+03A1 -->
161 // <!-- there is no Sigmaf, and no U+03A2 character either -->
162 {"Sigma", "931"}, // greek capital letter sigma,U+03A3 ISOgrk3 -->
163 {"Tau", "932"}, // greek capital letter tau, U+03A4 -->
164 {"Upsilon", "933"}, // greek capital letter upsilon,U+03A5 ISOgrk3 -->
165 {"Phi", "934"}, // greek capital letter phi,U+03A6 ISOgrk3 -->
166 {"Chi", "935"}, // greek capital letter chi, U+03A7 -->
167 {"Psi", "936"}, // greek capital letter psi,U+03A8 ISOgrk3 -->
168 {"Omega", "937"}, // greek capital letter omega,U+03A9 ISOgrk3 -->
169 {"alpha", "945"}, // greek small letter alpha,U+03B1 ISOgrk3 -->
170 {"beta", "946"}, // greek small letter beta, U+03B2 ISOgrk3 -->
171 {"gamma", "947"}, // greek small letter gamma,U+03B3 ISOgrk3 -->
172 {"delta", "948"}, // greek small letter delta,U+03B4 ISOgrk3 -->
173 {"epsilon", "949"}, // greek small letter epsilon,U+03B5 ISOgrk3 -->
174 {"zeta", "950"}, // greek small letter zeta, U+03B6 ISOgrk3 -->
175 {"eta", "951"}, // greek small letter eta, U+03B7 ISOgrk3 -->
176 {"theta", "952"}, // greek small letter theta,U+03B8 ISOgrk3 -->
177 {"iota", "953"}, // greek small letter iota, U+03B9 ISOgrk3 -->
178 {"kappa", "954"}, // greek small letter kappa,U+03BA ISOgrk3 -->
179 {"lambda", "955"}, // greek small letter lambda,U+03BB ISOgrk3 -->
180 {"mu", "956"}, // greek small letter mu, U+03BC ISOgrk3 -->
181 {"nu", "957"}, // greek small letter nu, U+03BD ISOgrk3 -->
182 {"xi", "958"}, // greek small letter xi, U+03BE ISOgrk3 -->
183 {"omicron", "959"}, // greek small letter omicron, U+03BF NEW -->
184 {"pi", "960"}, // greek small letter pi, U+03C0 ISOgrk3 -->
185 {"rho", "961"}, // greek small letter rho, U+03C1 ISOgrk3 -->
186 {"sigmaf", "962"}, // greek small letter final sigma,U+03C2 ISOgrk3 -->
187 {"sigma", "963"}, // greek small letter sigma,U+03C3 ISOgrk3 -->
188 {"tau", "964"}, // greek small letter tau, U+03C4 ISOgrk3 -->
189 {"upsilon", "965"}, // greek small letter upsilon,U+03C5 ISOgrk3 -->
190 {"phi", "966"}, // greek small letter phi, U+03C6 ISOgrk3 -->
191 {"chi", "967"}, // greek small letter chi, U+03C7 ISOgrk3 -->
192 {"psi", "968"}, // greek small letter psi, U+03C8 ISOgrk3 -->
193 {"omega", "969"}, // greek small letter omega,U+03C9 ISOgrk3 -->
194 {"thetasym", "977"}, // greek small letter theta symbol,U+03D1 NEW -->
195 {"upsih", "978"}, // greek upsilon with hook symbol,U+03D2 NEW -->
196 {"piv", "982"}, // greek pi symbol, U+03D6 ISOgrk3 -->
197 // <!-- General Punctuation -->
198 {"bull", "8226"}, // bullet = black small circle,U+2022 ISOpub -->
199 // <!-- bullet is NOT the same as bullet operator, U+2219 -->
200 {"hellip", "8230"}, // horizontal ellipsis = three dot leader,U+2026 ISOpub -->
201 {"prime", "8242"}, // prime = minutes = feet, U+2032 ISOtech -->
202 {"Prime", "8243"}, // double prime = seconds = inches,U+2033 ISOtech -->
203 {"oline", "8254"}, // overline = spacing overscore,U+203E NEW -->
204 {"frasl", "8260"}, // fraction slash, U+2044 NEW -->
205 // <!-- Letterlike Symbols -->
206 {"weierp", "8472"}, // script capital P = power set= Weierstrass p, U+2118 ISOamso -->
207 {"image", "8465"}, // blackletter capital I = imaginary part,U+2111 ISOamso -->
208 {"real", "8476"}, // blackletter capital R = real part symbol,U+211C ISOamso -->
209 {"trade", "8482"}, // trade mark sign, U+2122 ISOnum -->
210 {"alefsym", "8501"}, // alef symbol = first transfinite cardinal,U+2135 NEW -->
211 // <!-- alef symbol is NOT the same as hebrew letter alef,U+05D0 although the
212 // same glyph could be used to depict both characters -->
213 // <!-- Arrows -->
214 {"larr", "8592"}, // leftwards arrow, U+2190 ISOnum -->
215 {"uarr", "8593"}, // upwards arrow, U+2191 ISOnum-->
216 {"rarr", "8594"}, // rightwards arrow, U+2192 ISOnum -->
217 {"darr", "8595"}, // downwards arrow, U+2193 ISOnum -->
218 {"harr", "8596"}, // left right arrow, U+2194 ISOamsa -->
219 {"crarr", "8629"}, // downwards arrow with corner leftwards= carriage return, U+21B5 NEW -->
220 {"lArr", "8656"}, // leftwards double arrow, U+21D0 ISOtech -->
221 // <!-- ISO 10646 does not say that lArr is the same as the 'is implied by'
222 // arrow but also does not have any other character for that function.
223 // So ? lArr canbe used for 'is implied by' as ISOtech suggests -->
224 {"uArr", "8657"}, // upwards double arrow, U+21D1 ISOamsa -->
225 {"rArr", "8658"}, // rightwards double arrow,U+21D2 ISOtech -->
226 // <!-- ISO 10646 does not say this is the 'implies' character but does not
227 // have another character with this function so ?rArr can be used for
228 // 'implies' as ISOtech suggests -->
229 {"dArr", "8659"}, // downwards double arrow, U+21D3 ISOamsa -->
230 {"hArr", "8660"}, // left right double arrow,U+21D4 ISOamsa -->
231 // <!-- Mathematical Operators -->
232 {"forall", "8704"}, // for all, U+2200 ISOtech -->
233 {"part", "8706"}, // partial differential, U+2202 ISOtech -->
234 {"exist", "8707"}, // there exists, U+2203 ISOtech -->
235 {"empty", "8709"}, // empty set = null set = diameter,U+2205 ISOamso -->
236 {"nabla", "8711"}, // nabla = backward difference,U+2207 ISOtech -->
237 {"isin", "8712"}, // element of, U+2208 ISOtech -->
238 {"notin", "8713"}, // not an element of, U+2209 ISOtech -->
239 {"ni", "8715"}, // contains as member, U+220B ISOtech -->
240 // <!-- should there be a more memorable name than 'ni'? -->
241 {"prod", "8719"}, // n-ary product = product sign,U+220F ISOamsb -->
242 // <!-- prod is NOT the same character as U+03A0 'greek capital letter pi'
243 // though the same glyph might be used for both -->
244 {"sum", "8721"}, // n-ary summation, U+2211 ISOamsb -->
245 // <!-- sum is NOT the same character as U+03A3 'greek capital letter sigma'
246 // though the same glyph might be used for both -->
247 {"minus", "8722"}, // minus sign, U+2212 ISOtech -->
248 {"lowast", "8727"}, // asterisk operator, U+2217 ISOtech -->
249 {"radic", "8730"}, // square root = radical sign,U+221A ISOtech -->
250 {"prop", "8733"}, // proportional to, U+221D ISOtech -->
251 {"infin", "8734"}, // infinity, U+221E ISOtech -->
252 {"ang", "8736"}, // angle, U+2220 ISOamso -->
253 {"and", "8743"}, // logical and = wedge, U+2227 ISOtech -->
254 {"or", "8744"}, // logical or = vee, U+2228 ISOtech -->
255 {"cap", "8745"}, // intersection = cap, U+2229 ISOtech -->
256 {"cup", "8746"}, // union = cup, U+222A ISOtech -->
257 {"int", "8747"}, // integral, U+222B ISOtech -->
258 {"there4", "8756"}, // therefore, U+2234 ISOtech -->
259 {"sim", "8764"}, // tilde operator = varies with = similar to,U+223C ISOtech -->
260 // <!-- tilde operator is NOT the same character as the tilde, U+007E,although
261 // the same glyph might be used to represent both -->
262 {"cong", "8773"}, // approximately equal to, U+2245 ISOtech -->
263 {"asymp", "8776"}, // almost equal to = asymptotic to,U+2248 ISOamsr -->
264 {"ne", "8800"}, // not equal to, U+2260 ISOtech -->
265 {"equiv", "8801"}, // identical to, U+2261 ISOtech -->
266 {"le", "8804"}, // less-than or equal to, U+2264 ISOtech -->
267 {"ge", "8805"}, // greater-than or equal to,U+2265 ISOtech -->
268 {"sub", "8834"}, // subset of, U+2282 ISOtech -->
269 {"sup", "8835"}, // superset of, U+2283 ISOtech -->
270 // <!-- note that nsup, 'not a superset of, U+2283' is not covered by the
271 // Symbol font encoding and is not included. Should it be, for symmetry?
272 // It is in ISOamsn --> <!ENTITY nsub", "8836"},
273 // not a subset of, U+2284 ISOamsn -->
274 {"sube", "8838"}, // subset of or equal to, U+2286 ISOtech -->
275 {"supe", "8839"}, // superset of or equal to,U+2287 ISOtech -->
276 {"oplus", "8853"}, // circled plus = direct sum,U+2295 ISOamsb -->
277 {"otimes", "8855"}, // circled times = vector product,U+2297 ISOamsb -->
278 {"perp", "8869"}, // up tack = orthogonal to = perpendicular,U+22A5 ISOtech -->
279 {"sdot", "8901"}, // dot operator, U+22C5 ISOamsb -->
280 // <!-- dot operator is NOT the same character as U+00B7 middle dot -->
281 // <!-- Miscellaneous Technical -->
282 {"lceil", "8968"}, // left ceiling = apl upstile,U+2308 ISOamsc -->
283 {"rceil", "8969"}, // right ceiling, U+2309 ISOamsc -->
284 {"lfloor", "8970"}, // left floor = apl downstile,U+230A ISOamsc -->
285 {"rfloor", "8971"}, // right floor, U+230B ISOamsc -->
286 {"lang", "9001"}, // left-pointing angle bracket = bra,U+2329 ISOtech -->
287 // <!-- lang is NOT the same character as U+003C 'less than' or U+2039 'single left-pointing angle quotation
288 // mark' -->
289 {"rang", "9002"}, // right-pointing angle bracket = ket,U+232A ISOtech -->
290 // <!-- rang is NOT the same character as U+003E 'greater than' or U+203A
291 // 'single right-pointing angle quotation mark' -->
292 // <!-- Geometric Shapes -->
293 {"loz", "9674"}, // lozenge, U+25CA ISOpub -->
294 // <!-- Miscellaneous Symbols -->
295 {"spades", "9824"}, // black spade suit, U+2660 ISOpub -->
296 // <!-- black here seems to mean filled as opposed to hollow -->
297 {"clubs", "9827"}, // black club suit = shamrock,U+2663 ISOpub -->
298 {"hearts", "9829"}, // black heart suit = valentine,U+2665 ISOpub -->
299 {"diams", "9830"}, // black diamond suit, U+2666 ISOpub -->
300
301 // <!-- Latin Extended-A -->
302 {"OElig", "338"}, // -- latin capital ligature OE,U+0152 ISOlat2 -->
303 {"oelig", "339"}, // -- latin small ligature oe, U+0153 ISOlat2 -->
304 // <!-- ligature is a misnomer, this is a separate character in some languages -->
305 {"Scaron", "352"}, // -- latin capital letter S with caron,U+0160 ISOlat2 -->
306 {"scaron", "353"}, // -- latin small letter s with caron,U+0161 ISOlat2 -->
307 {"Yuml", "376"}, // -- latin capital letter Y with diaeresis,U+0178 ISOlat2 -->
308 // <!-- Spacing Modifier Letters -->
309 {"circ", "710"}, // -- modifier letter circumflex accent,U+02C6 ISOpub -->
310 {"tilde", "732"}, // small tilde, U+02DC ISOdia -->
311 // <!-- General Punctuation -->
312 {"ensp", "8194"}, // en space, U+2002 ISOpub -->
313 {"emsp", "8195"}, // em space, U+2003 ISOpub -->
314 {"thinsp", "8201"}, // thin space, U+2009 ISOpub -->
315 {"zwnj", "8204"}, // zero width non-joiner,U+200C NEW RFC 2070 -->
316 {"zwj", "8205"}, // zero width joiner, U+200D NEW RFC 2070 -->
317 {"lrm", "8206"}, // left-to-right mark, U+200E NEW RFC 2070 -->
318 {"rlm", "8207"}, // right-to-left mark, U+200F NEW RFC 2070 -->
319 {"ndash", "8211"}, // en dash, U+2013 ISOpub -->
320 {"mdash", "8212"}, // em dash, U+2014 ISOpub -->
321 {"lsquo", "8216"}, // left single quotation mark,U+2018 ISOnum -->
322 {"rsquo", "8217"}, // right single quotation mark,U+2019 ISOnum -->
323 {"sbquo", "8218"}, // single low-9 quotation mark, U+201A NEW -->
324 {"ldquo", "8220"}, // left double quotation mark,U+201C ISOnum -->
325 {"rdquo", "8221"}, // right double quotation mark,U+201D ISOnum -->
326 {"bdquo", "8222"}, // double low-9 quotation mark, U+201E NEW -->
327 {"dagger", "8224"}, // dagger, U+2020 ISOpub -->
328 {"Dagger", "8225"}, // double dagger, U+2021 ISOpub -->
329 {"permil", "8240"}, // per mille sign, U+2030 ISOtech -->
330 {"lsaquo", "8249"}, // single left-pointing angle quotation mark,U+2039 ISO proposed -->
331 // <!-- lsaquo is proposed but not yet ISO standardized -->
332 {"rsaquo", "8250"}, // single right-pointing angle quotation mark,U+203A ISO proposed -->
333 // <!-- rsaquo is proposed but not yet ISO standardized -->
334 {"euro", "8364"}, // -- euro sign, U+20AC NEW -->
335 };
336
337 private static volatile Map<String, String> mapNameToValue;
338
339 private Entities() {
340 // Private constructor for utilities classes
341 }
342
343 /**
344 * Returns unescaped entity representation.
345 * @param str entity
346 * @return unescaped entity representation
347 */
348 public static String unescape(String str) {
349 int firstAmp = str.indexOf('&');
350 if (firstAmp < 0)
351 return str;
352 StringBuilder res = new StringBuilder(str.substring(0, firstAmp));
353 int len = str.length();
354 for (int i = firstAmp; i < len; i++) {
355 char c = str.charAt(i);
356 if (c == '&') {
357 int nextIdx = i + 1;
358 int semiColonIdx = str.indexOf(';', nextIdx);
359 if (semiColonIdx == -1) {
360 res.append(c);
361 continue;
362 }
363 int amphersandIdx = str.indexOf('&', i + 1);
364 if (amphersandIdx != -1 && amphersandIdx < semiColonIdx) {
365 // Then the text looks like "&...&...;"
366 res.append(c);
367 continue;
368 }
369 String entityContent = str.substring(nextIdx, semiColonIdx);
370 int entityValue = -1;
371 int entityContentLen = entityContent.length();
372 if (entityContentLen > 0) {
373 if (entityContent.charAt(0) == '#') { // escaped value content is an integer (decimal or hexidecimal)
374 if (entityContentLen > 1) {
375 char isHexChar = entityContent.charAt(1);
376 try {
377 switch (isHexChar) {
378 case 'X' :
379 case 'x' :
380 entityValue = Integer.parseInt(entityContent.substring(2), 16);
381 break;
382 default :
383 entityValue = Integer.parseInt(entityContent.substring(1), 10);
384 }
385 if (entityValue > 0xFFFF) {
386 entityValue = -1;
387 }
388 } catch (NumberFormatException e) {
389 entityValue = -1;
390 }
391 }
392 } else { // escaped value content is an entity name
393 String value = getMapNameToValue().get(entityContent);
394 entityValue = value == null ? -1 : Integer.parseInt(value);
395 }
396 }
397
398 if (entityValue == -1) {
399 res.append('&').append(entityContent).append(';');
400 } else {
401 res.append((char) entityValue);
402 }
403 i = semiColonIdx; // move index up to the semi-colon
404 } else {
405 res.append(c);
406 }
407 }
408 return res.toString();
409 }
410
411 private static synchronized Map<String, String> getMapNameToValue() {
412 if (mapNameToValue == null) {
413 mapNameToValue = new HashMap<>();
414 for (String[] pair : ARRAY) {
415 mapNameToValue.put(pair[0], pair[1]);
416 }
417 }
418 return mapNameToValue;
419 }
420}
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