001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    /* Taken from: http://svn.apache.org/viewvc/commons/proper/lang/trunk/src/java/org/apache/commons/lang/Entities.java?revision=636641 */
019    package org.openstreetmap.josm.data.validation.util;
020    
021    import java.util.HashMap;
022    import java.util.Map;
023    
024    /**
025     * <p>
026     * Provides HTML and XML entity utilities.
027     * </p>
028     * @see <a href="http://hotwired.lycos.com/webmonkey/reference/special_characters/">ISO Entities</a>
029     * @see <a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character Entities for ISO Latin-1</a>
030     * @see <a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0 Character entity references</a>
031     * @see <a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01 Character References</a>
032     * @see <a href="http://www.w3.org/TR/html401/charset.html#code-position">HTML 4.01 Code positions</a>
033     */
034    public class Entities {
035        private static final String[][] ARRAY = {
036            /* BASIC */
037            {"quot", "34"}, // " - double-quote
038            {"amp", "38"}, // & - ampersand
039            {"lt", "60"}, // < - less-than
040            {"gt", "62"}, // > - greater-than
041            /* XML */
042            {"apos", "39"}, // XML apostrophe
043            /* ISO8859_1 */
044            {"nbsp", "160"}, // non-breaking space
045            {"iexcl", "161"}, // inverted exclamation mark
046            {"cent", "162"}, // cent sign
047            {"pound", "163"}, // pound sign
048            {"curren", "164"}, // currency sign
049            {"yen", "165"}, // yen sign = yuan sign
050            {"brvbar", "166"}, // broken bar = broken vertical bar
051            {"sect", "167"}, // section sign
052            {"uml", "168"}, // diaeresis = spacing diaeresis
053            {"copy", "169"}, // ?? - copyright sign
054            {"ordf", "170"}, // feminine ordinal indicator
055            {"laquo", "171"}, // left-pointing double angle quotation mark = left pointing guillemet
056            {"not", "172"}, // not sign
057            {"shy", "173"}, // soft hyphen = discretionary hyphen
058            {"reg", "174"}, // ?? - registered trademark sign
059            {"macr", "175"}, // macron = spacing macron = overline = APL overbar
060            {"deg", "176"}, // degree sign
061            {"plusmn", "177"}, // plus-minus sign = plus-or-minus sign
062            {"sup2", "178"}, // superscript two = superscript digit two = squared
063            {"sup3", "179"}, // superscript three = superscript digit three = cubed
064            {"acute", "180"}, // acute accent = spacing acute
065            {"micro", "181"}, // micro sign
066            {"para", "182"}, // pilcrow sign = paragraph sign
067            {"middot", "183"}, // middle dot = Georgian comma = Greek middle dot
068            {"cedil", "184"}, // cedilla = spacing cedilla
069            {"sup1", "185"}, // superscript one = superscript digit one
070            {"ordm", "186"}, // masculine ordinal indicator
071            {"raquo", "187"}, // right-pointing double angle quotation mark = right pointing guillemet
072            {"frac14", "188"}, // vulgar fraction one quarter = fraction one quarter
073            {"frac12", "189"}, // vulgar fraction one half = fraction one half
074            {"frac34", "190"}, // vulgar fraction three quarters = fraction three quarters
075            {"iquest", "191"}, // inverted question mark = turned question mark
076            {"Agrave", "192"}, // ?? - uppercase A, grave accent
077            {"Aacute", "193"}, // ?? - uppercase A, acute accent
078            {"Acirc", "194"}, // ?? - uppercase A, circumflex accent
079            {"Atilde", "195"}, // ?? - uppercase A, tilde
080            {"Auml", "196"}, // ?? - uppercase A, umlaut
081            {"Aring", "197"}, // ?? - uppercase A, ring
082            {"AElig", "198"}, // ?? - uppercase AE
083            {"Ccedil", "199"}, // ?? - uppercase C, cedilla
084            {"Egrave", "200"}, // ?? - uppercase E, grave accent
085            {"Eacute", "201"}, // ?? - uppercase E, acute accent
086            {"Ecirc", "202"}, // ?? - uppercase E, circumflex accent
087            {"Euml", "203"}, // ?? - uppercase E, umlaut
088            {"Igrave", "204"}, // ?? - uppercase I, grave accent
089            {"Iacute", "205"}, // ?? - uppercase I, acute accent
090            {"Icirc", "206"}, // ?? - uppercase I, circumflex accent
091            {"Iuml", "207"}, // ?? - uppercase I, umlaut
092            {"ETH", "208"}, // ?? - uppercase Eth, Icelandic
093            {"Ntilde", "209"}, // ?? - uppercase N, tilde
094            {"Ograve", "210"}, // ?? - uppercase O, grave accent
095            {"Oacute", "211"}, // ?? - uppercase O, acute accent
096            {"Ocirc", "212"}, // ?? - uppercase O, circumflex accent
097            {"Otilde", "213"}, // ?? - uppercase O, tilde
098            {"Ouml", "214"}, // ?? - uppercase O, umlaut
099            {"times", "215"}, // multiplication sign
100            {"Oslash", "216"}, // ?? - uppercase O, slash
101            {"Ugrave", "217"}, // ?? - uppercase U, grave accent
102            {"Uacute", "218"}, // ?? - uppercase U, acute accent
103            {"Ucirc", "219"}, // ?? - uppercase U, circumflex accent
104            {"Uuml", "220"}, // ?? - uppercase U, umlaut
105            {"Yacute", "221"}, // ?? - uppercase Y, acute accent
106            {"THORN", "222"}, // ?? - uppercase THORN, Icelandic
107            {"szlig", "223"}, // ?? - lowercase sharps, German
108            {"agrave", "224"}, // ?? - lowercase a, grave accent
109            {"aacute", "225"}, // ?? - lowercase a, acute accent
110            {"acirc", "226"}, // ?? - lowercase a, circumflex accent
111            {"atilde", "227"}, // ?? - lowercase a, tilde
112            {"auml", "228"}, // ?? - lowercase a, umlaut
113            {"aring", "229"}, // ?? - lowercase a, ring
114            {"aelig", "230"}, // ?? - lowercase ae
115            {"ccedil", "231"}, // ?? - lowercase c, cedilla
116            {"egrave", "232"}, // ?? - lowercase e, grave accent
117            {"eacute", "233"}, // ?? - lowercase e, acute accent
118            {"ecirc", "234"}, // ?? - lowercase e, circumflex accent
119            {"euml", "235"}, // ?? - lowercase e, umlaut
120            {"igrave", "236"}, // ?? - lowercase i, grave accent
121            {"iacute", "237"}, // ?? - lowercase i, acute accent
122            {"icirc", "238"}, // ?? - lowercase i, circumflex accent
123            {"iuml", "239"}, // ?? - lowercase i, umlaut
124            {"eth", "240"}, // ?? - lowercase eth, Icelandic
125            {"ntilde", "241"}, // ?? - lowercase n, tilde
126            {"ograve", "242"}, // ?? - lowercase o, grave accent
127            {"oacute", "243"}, // ?? - lowercase o, acute accent
128            {"ocirc", "244"}, // ?? - lowercase o, circumflex accent
129            {"otilde", "245"}, // ?? - lowercase o, tilde
130            {"ouml", "246"}, // ?? - lowercase o, umlaut
131            {"divide", "247"}, // division sign
132            {"oslash", "248"}, // ?? - lowercase o, slash
133            {"ugrave", "249"}, // ?? - lowercase u, grave accent
134            {"uacute", "250"}, // ?? - lowercase u, acute accent
135            {"ucirc", "251"}, // ?? - lowercase u, circumflex accent
136            {"uuml", "252"}, // ?? - lowercase u, umlaut
137            {"yacute", "253"}, // ?? - lowercase y, acute accent
138            {"thorn", "254"}, // ?? - lowercase thorn, Icelandic
139            {"yuml", "255"}, // ?? - 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 Map<String, String> mapNameToValue = null;
338    
339        public String unescape(String str) {
340            int firstAmp = str.indexOf('&');
341            if (firstAmp < 0)
342                return str;
343            String res = str.substring(0, firstAmp);
344            int len = str.length();
345            for (int i = firstAmp; i < len; i++) {
346                char c = str.charAt(i);
347                if (c == '&') {
348                    int nextIdx = i + 1;
349                    int semiColonIdx = str.indexOf(';', nextIdx);
350                    if (semiColonIdx == -1) {
351                        res += c;
352                        continue;
353                    }
354                    int amphersandIdx = str.indexOf('&', i + 1);
355                    if (amphersandIdx != -1 && amphersandIdx < semiColonIdx) {
356                        // Then the text looks like &...&...;
357                        res += c;
358                        continue;
359                    }
360                    String entityContent = str.substring(nextIdx, semiColonIdx);
361                    int entityValue = -1;
362                    int entityContentLen = entityContent.length();
363                    if (entityContentLen > 0) {
364                        if (entityContent.charAt(0) == '#') { // escaped value content is an integer (decimal or
365                            // hexidecimal)
366                            if (entityContentLen > 1) {
367                                char isHexChar = entityContent.charAt(1);
368                                try {
369                                    switch (isHexChar) {
370                                        case 'X' :
371                                        case 'x' : {
372                                            entityValue = Integer.parseInt(entityContent.substring(2), 16);
373                                            break;
374                                        }
375                                        default : {
376                                            entityValue = Integer.parseInt(entityContent.substring(1), 10);
377                                        }
378                                    }
379                                    if (entityValue > 0xFFFF) {
380                                        entityValue = -1;
381                                    }
382                                } catch (NumberFormatException e) {
383                                    entityValue = -1;
384                                }
385                            }
386                        } else { // escaped value content is an entity name
387                            if(mapNameToValue == null)
388                            {
389                                mapNameToValue = new HashMap<String, String>();
390                                for (int in = 0; in < ARRAY.length; ++in)
391                                    mapNameToValue.put(ARRAY[in][0], ARRAY[in][1]);
392                            }
393                            String value = mapNameToValue.get(entityContent);
394                            entityValue = (value == null ? -1 : Integer.parseInt(value));
395                        }
396                    }
397    
398                    if (entityValue == -1) {
399                        res += '&' + entityContent + ';';
400                    } else {
401                        res += (char) entityValue;
402                    }
403                    i = semiColonIdx; // move index up to the semi-colon
404                } else {
405                    res += c;
406                }
407            }
408            return res;
409        }
410    }