Java tutorial
/* * Copyright 2002-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.lang; import java.util.HashMap; import java.util.Map; import java.util.TreeMap; /** * <p>Provides HTML and XML entity utilities.</p> * * @see <a href="http://hotwired.lycos.com/webmonkey/reference/special_characters/">ISO Entities</a> * @see </br><a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character Entities for ISO Latin-1</a> * @see </br><a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0 Character entity references</a> * @see </br><a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01 Character References</a> * @see </br><a href="http://www.w3.org/TR/html401/charset.html#code-position">HTML 4.01 Code positions</a> * * @author <a href="mailto:alex@purpletech.com">Alexander Day Chaffee</a> * @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a> * @since 2.0 * @version $Id: Entities.java,v 1.1 2008-05-02 15:43:01 gudy Exp $ */ public class Entities { private static final String[][] BASIC_ARRAY = { { "quot", "34" }, // " - double-quote { "amp", "38" }, // & - ampersand { "lt", "60" }, // < - less-than { "gt", "62" }, // > - greater-than }; private static final String[][] APOS_ARRAY = { { "apos", "39" }, // XML apostrophe }; // package scoped for testing static final String[][] ISO8859_1_ARRAY = { { "nbsp", "160" }, // non-breaking space { "iexcl", "161" }, //inverted exclamation mark { "cent", "162" }, //cent sign { "pound", "163" }, //pound sign { "curren", "164" }, //currency sign { "yen", "165" }, //yen sign = yuan sign { "brvbar", "166" }, //broken bar = broken vertical bar { "sect", "167" }, //section sign { "uml", "168" }, //diaeresis = spacing diaeresis { "copy", "169" }, // - copyright sign { "ordf", "170" }, //feminine ordinal indicator { "laquo", "171" }, //left-pointing double angle quotation mark = left pointing guillemet { "not", "172" }, //not sign { "shy", "173" }, //soft hyphen = discretionary hyphen { "reg", "174" }, // - registered trademark sign { "macr", "175" }, //macron = spacing macron = overline = APL overbar { "deg", "176" }, //degree sign { "plusmn", "177" }, //plus-minus sign = plus-or-minus sign { "sup2", "178" }, //superscript two = superscript digit two = squared { "sup3", "179" }, //superscript three = superscript digit three = cubed { "acute", "180" }, //acute accent = spacing acute { "micro", "181" }, //micro sign { "para", "182" }, //pilcrow sign = paragraph sign { "middot", "183" }, //middle dot = Georgian comma = Greek middle dot { "cedil", "184" }, //cedilla = spacing cedilla { "sup1", "185" }, //superscript one = superscript digit one { "ordm", "186" }, //masculine ordinal indicator { "raquo", "187" }, //right-pointing double angle quotation mark = right pointing guillemet { "frac14", "188" }, //vulgar fraction one quarter = fraction one quarter { "frac12", "189" }, //vulgar fraction one half = fraction one half { "frac34", "190" }, //vulgar fraction three quarters = fraction three quarters { "iquest", "191" }, //inverted question mark = turned question mark { "Agrave", "192" }, // - uppercase A, grave accent { "Aacute", "193" }, // - uppercase A, acute accent { "Acirc", "194" }, // - uppercase A, circumflex accent { "Atilde", "195" }, // - uppercase A, tilde { "Auml", "196" }, // - uppercase A, umlaut { "Aring", "197" }, // - uppercase A, ring { "AElig", "198" }, // - uppercase AE { "Ccedil", "199" }, // - uppercase C, cedilla { "Egrave", "200" }, // - uppercase E, grave accent { "Eacute", "201" }, // - uppercase E, acute accent { "Ecirc", "202" }, // - uppercase E, circumflex accent { "Euml", "203" }, // - uppercase E, umlaut { "Igrave", "204" }, // - uppercase I, grave accent { "Iacute", "205" }, // - uppercase I, acute accent { "Icirc", "206" }, // - uppercase I, circumflex accent { "Iuml", "207" }, // - uppercase I, umlaut { "ETH", "208" }, // - uppercase Eth, Icelandic { "Ntilde", "209" }, // - uppercase N, tilde { "Ograve", "210" }, // - uppercase O, grave accent { "Oacute", "211" }, // - uppercase O, acute accent { "Ocirc", "212" }, // - uppercase O, circumflex accent { "Otilde", "213" }, // - uppercase O, tilde { "Ouml", "214" }, // - uppercase O, umlaut { "times", "215" }, //multiplication sign { "Oslash", "216" }, // - uppercase O, slash { "Ugrave", "217" }, // - uppercase U, grave accent { "Uacute", "218" }, // - uppercase U, acute accent { "Ucirc", "219" }, // - uppercase U, circumflex accent { "Uuml", "220" }, // - uppercase U, umlaut { "Yacute", "221" }, // - uppercase Y, acute accent { "THORN", "222" }, // - uppercase THORN, Icelandic { "szlig", "223" }, // - lowercase sharps, German { "agrave", "224" }, // - lowercase a, grave accent { "aacute", "225" }, // - lowercase a, acute accent { "acirc", "226" }, // - lowercase a, circumflex accent { "atilde", "227" }, // - lowercase a, tilde { "auml", "228" }, // - lowercase a, umlaut { "aring", "229" }, // - lowercase a, ring { "aelig", "230" }, // - lowercase ae { "ccedil", "231" }, // - lowercase c, cedilla { "egrave", "232" }, // - lowercase e, grave accent { "eacute", "233" }, // - lowercase e, acute accent { "ecirc", "234" }, // - lowercase e, circumflex accent { "euml", "235" }, // - lowercase e, umlaut { "igrave", "236" }, // - lowercase i, grave accent { "iacute", "237" }, // - lowercase i, acute accent { "icirc", "238" }, // - lowercase i, circumflex accent { "iuml", "239" }, // - lowercase i, umlaut { "eth", "240" }, // - lowercase eth, Icelandic { "ntilde", "241" }, // - lowercase n, tilde { "ograve", "242" }, // - lowercase o, grave accent { "oacute", "243" }, // - lowercase o, acute accent { "ocirc", "244" }, // - lowercase o, circumflex accent { "otilde", "245" }, // - lowercase o, tilde { "ouml", "246" }, // - lowercase o, umlaut { "divide", "247" }, // division sign { "oslash", "248" }, // - lowercase o, slash { "ugrave", "249" }, // - lowercase u, grave accent { "uacute", "250" }, // - lowercase u, acute accent { "ucirc", "251" }, // - lowercase u, circumflex accent { "uuml", "252" }, // - lowercase u, umlaut { "yacute", "253" }, // - lowercase y, acute accent { "thorn", "254" }, // - lowercase thorn, Icelandic { "yuml", "255" }, // - lowercase y, umlaut }; // http://www.w3.org/TR/REC-html40/sgml/entities.html // package scoped for testing static final String[][] HTML40_ARRAY = { // <!-- Latin Extended-B --> { "fnof", "402" }, //latin small f with hook = function= florin, U+0192 ISOtech --> // <!-- Greek --> { "Alpha", "913" }, //greek capital letter alpha, U+0391 --> { "Beta", "914" }, //greek capital letter beta, U+0392 --> { "Gamma", "915" }, //greek capital letter gamma,U+0393 ISOgrk3 --> { "Delta", "916" }, //greek capital letter delta,U+0394 ISOgrk3 --> { "Epsilon", "917" }, //greek capital letter epsilon, U+0395 --> { "Zeta", "918" }, //greek capital letter zeta, U+0396 --> { "Eta", "919" }, //greek capital letter eta, U+0397 --> { "Theta", "920" }, //greek capital letter theta,U+0398 ISOgrk3 --> { "Iota", "921" }, //greek capital letter iota, U+0399 --> { "Kappa", "922" }, //greek capital letter kappa, U+039A --> { "Lambda", "923" }, //greek capital letter lambda,U+039B ISOgrk3 --> { "Mu", "924" }, //greek capital letter mu, U+039C --> { "Nu", "925" }, //greek capital letter nu, U+039D --> { "Xi", "926" }, //greek capital letter xi, U+039E ISOgrk3 --> { "Omicron", "927" }, //greek capital letter omicron, U+039F --> { "Pi", "928" }, //greek capital letter pi, U+03A0 ISOgrk3 --> { "Rho", "929" }, //greek capital letter rho, U+03A1 --> // <!-- there is no Sigmaf, and no U+03A2 character either --> { "Sigma", "931" }, //greek capital letter sigma,U+03A3 ISOgrk3 --> { "Tau", "932" }, //greek capital letter tau, U+03A4 --> { "Upsilon", "933" }, //greek capital letter upsilon,U+03A5 ISOgrk3 --> { "Phi", "934" }, //greek capital letter phi,U+03A6 ISOgrk3 --> { "Chi", "935" }, //greek capital letter chi, U+03A7 --> { "Psi", "936" }, //greek capital letter psi,U+03A8 ISOgrk3 --> { "Omega", "937" }, //greek capital letter omega,U+03A9 ISOgrk3 --> { "alpha", "945" }, //greek small letter alpha,U+03B1 ISOgrk3 --> { "beta", "946" }, //greek small letter beta, U+03B2 ISOgrk3 --> { "gamma", "947" }, //greek small letter gamma,U+03B3 ISOgrk3 --> { "delta", "948" }, //greek small letter delta,U+03B4 ISOgrk3 --> { "epsilon", "949" }, //greek small letter epsilon,U+03B5 ISOgrk3 --> { "zeta", "950" }, //greek small letter zeta, U+03B6 ISOgrk3 --> { "eta", "951" }, //greek small letter eta, U+03B7 ISOgrk3 --> { "theta", "952" }, //greek small letter theta,U+03B8 ISOgrk3 --> { "iota", "953" }, //greek small letter iota, U+03B9 ISOgrk3 --> { "kappa", "954" }, //greek small letter kappa,U+03BA ISOgrk3 --> { "lambda", "955" }, //greek small letter lambda,U+03BB ISOgrk3 --> { "mu", "956" }, //greek small letter mu, U+03BC ISOgrk3 --> { "nu", "957" }, //greek small letter nu, U+03BD ISOgrk3 --> { "xi", "958" }, //greek small letter xi, U+03BE ISOgrk3 --> { "omicron", "959" }, //greek small letter omicron, U+03BF NEW --> { "pi", "960" }, //greek small letter pi, U+03C0 ISOgrk3 --> { "rho", "961" }, //greek small letter rho, U+03C1 ISOgrk3 --> { "sigmaf", "962" }, //greek small letter final sigma,U+03C2 ISOgrk3 --> { "sigma", "963" }, //greek small letter sigma,U+03C3 ISOgrk3 --> { "tau", "964" }, //greek small letter tau, U+03C4 ISOgrk3 --> { "upsilon", "965" }, //greek small letter upsilon,U+03C5 ISOgrk3 --> { "phi", "966" }, //greek small letter phi, U+03C6 ISOgrk3 --> { "chi", "967" }, //greek small letter chi, U+03C7 ISOgrk3 --> { "psi", "968" }, //greek small letter psi, U+03C8 ISOgrk3 --> { "omega", "969" }, //greek small letter omega,U+03C9 ISOgrk3 --> { "thetasym", "977" }, //greek small letter theta symbol,U+03D1 NEW --> { "upsih", "978" }, //greek upsilon with hook symbol,U+03D2 NEW --> { "piv", "982" }, //greek pi symbol, U+03D6 ISOgrk3 --> // <!-- General Punctuation --> { "bull", "8226" }, //bullet = black small circle,U+2022 ISOpub --> // <!-- bullet is NOT the same as bullet operator, U+2219 --> { "hellip", "8230" }, //horizontal ellipsis = three dot leader,U+2026 ISOpub --> { "prime", "8242" }, //prime = minutes = feet, U+2032 ISOtech --> { "Prime", "8243" }, //double prime = seconds = inches,U+2033 ISOtech --> { "oline", "8254" }, //overline = spacing overscore,U+203E NEW --> { "frasl", "8260" }, //fraction slash, U+2044 NEW --> // <!-- Letterlike Symbols --> { "weierp", "8472" }, //script capital P = power set= Weierstrass p, U+2118 ISOamso --> { "image", "8465" }, //blackletter capital I = imaginary part,U+2111 ISOamso --> { "real", "8476" }, //blackletter capital R = real part symbol,U+211C ISOamso --> { "trade", "8482" }, //trade mark sign, U+2122 ISOnum --> { "alefsym", "8501" }, //alef symbol = first transfinite cardinal,U+2135 NEW --> // <!-- alef symbol is NOT the same as hebrew letter alef,U+05D0 although the same glyph could be used to depict both characters --> // <!-- Arrows --> { "larr", "8592" }, //leftwards arrow, U+2190 ISOnum --> { "uarr", "8593" }, //upwards arrow, U+2191 ISOnum--> { "rarr", "8594" }, //rightwards arrow, U+2192 ISOnum --> { "darr", "8595" }, //downwards arrow, U+2193 ISOnum --> { "harr", "8596" }, //left right arrow, U+2194 ISOamsa --> { "crarr", "8629" }, //downwards arrow with corner leftwards= carriage return, U+21B5 NEW --> { "lArr", "8656" }, //leftwards double arrow, U+21D0 ISOtech --> // <!-- ISO 10646 does not say that lArr is the same as the 'is implied by' arrowbut also does not have any other character for that function. So ? lArr canbe used for 'is implied by' as ISOtech suggests --> { "uArr", "8657" }, //upwards double arrow, U+21D1 ISOamsa --> { "rArr", "8658" }, //rightwards double arrow,U+21D2 ISOtech --> // <!-- ISO 10646 does not say this is the 'implies' character but does not have another character with this function so ?rArr can be used for 'implies' as ISOtech suggests --> { "dArr", "8659" }, //downwards double arrow, U+21D3 ISOamsa --> { "hArr", "8660" }, //left right double arrow,U+21D4 ISOamsa --> // <!-- Mathematical Operators --> { "forall", "8704" }, //for all, U+2200 ISOtech --> { "part", "8706" }, //partial differential, U+2202 ISOtech --> { "exist", "8707" }, //there exists, U+2203 ISOtech --> { "empty", "8709" }, //empty set = null set = diameter,U+2205 ISOamso --> { "nabla", "8711" }, //nabla = backward difference,U+2207 ISOtech --> { "isin", "8712" }, //element of, U+2208 ISOtech --> { "notin", "8713" }, //not an element of, U+2209 ISOtech --> { "ni", "8715" }, //contains as member, U+220B ISOtech --> // <!-- should there be a more memorable name than 'ni'? --> { "prod", "8719" }, //n-ary product = product sign,U+220F ISOamsb --> // <!-- prod is NOT the same character as U+03A0 'greek capital letter pi' though the same glyph might be used for both --> { "sum", "8721" }, //n-ary summation, U+2211 ISOamsb --> // <!-- sum is NOT the same character as U+03A3 'greek capital letter sigma' though the same glyph might be used for both --> { "minus", "8722" }, //minus sign, U+2212 ISOtech --> { "lowast", "8727" }, //asterisk operator, U+2217 ISOtech --> { "radic", "8730" }, //square root = radical sign,U+221A ISOtech --> { "prop", "8733" }, //proportional to, U+221D ISOtech --> { "infin", "8734" }, //infinity, U+221E ISOtech --> { "ang", "8736" }, //angle, U+2220 ISOamso --> { "and", "8743" }, //logical and = wedge, U+2227 ISOtech --> { "or", "8744" }, //logical or = vee, U+2228 ISOtech --> { "cap", "8745" }, //intersection = cap, U+2229 ISOtech --> { "cup", "8746" }, //union = cup, U+222A ISOtech --> { "int", "8747" }, //integral, U+222B ISOtech --> { "there4", "8756" }, //therefore, U+2234 ISOtech --> { "sim", "8764" }, //tilde operator = varies with = similar to,U+223C ISOtech --> // <!-- tilde operator is NOT the same character as the tilde, U+007E,although the same glyph might be used to represent both --> { "cong", "8773" }, //approximately equal to, U+2245 ISOtech --> { "asymp", "8776" }, //almost equal to = asymptotic to,U+2248 ISOamsr --> { "ne", "8800" }, //not equal to, U+2260 ISOtech --> { "equiv", "8801" }, //identical to, U+2261 ISOtech --> { "le", "8804" }, //less-than or equal to, U+2264 ISOtech --> { "ge", "8805" }, //greater-than or equal to,U+2265 ISOtech --> { "sub", "8834" }, //subset of, U+2282 ISOtech --> { "sup", "8835" }, //superset of, U+2283 ISOtech --> // <!-- note that nsup, 'not a superset of, U+2283' is not covered by the Symbol font encoding and is not included. Should it be, for symmetry?It is in ISOamsn --> <!ENTITY nsub", "8836"}, //not a subset of, U+2284 ISOamsn --> { "sube", "8838" }, //subset of or equal to, U+2286 ISOtech --> { "supe", "8839" }, //superset of or equal to,U+2287 ISOtech --> { "oplus", "8853" }, //circled plus = direct sum,U+2295 ISOamsb --> { "otimes", "8855" }, //circled times = vector product,U+2297 ISOamsb --> { "perp", "8869" }, //up tack = orthogonal to = perpendicular,U+22A5 ISOtech --> { "sdot", "8901" }, //dot operator, U+22C5 ISOamsb --> // <!-- dot operator is NOT the same character as U+00B7 middle dot --> // <!-- Miscellaneous Technical --> { "lceil", "8968" }, //left ceiling = apl upstile,U+2308 ISOamsc --> { "rceil", "8969" }, //right ceiling, U+2309 ISOamsc --> { "lfloor", "8970" }, //left floor = apl downstile,U+230A ISOamsc --> { "rfloor", "8971" }, //right floor, U+230B ISOamsc --> { "lang", "9001" }, //left-pointing angle bracket = bra,U+2329 ISOtech --> // <!-- lang is NOT the same character as U+003C 'less than' or U+2039 'single left-pointing angle quotation mark' --> { "rang", "9002" }, //right-pointing angle bracket = ket,U+232A ISOtech --> // <!-- rang is NOT the same character as U+003E 'greater than' or U+203A 'single right-pointing angle quotation mark' --> // <!-- Geometric Shapes --> { "loz", "9674" }, //lozenge, U+25CA ISOpub --> // <!-- Miscellaneous Symbols --> { "spades", "9824" }, //black spade suit, U+2660 ISOpub --> // <!-- black here seems to mean filled as opposed to hollow --> { "clubs", "9827" }, //black club suit = shamrock,U+2663 ISOpub --> { "hearts", "9829" }, //black heart suit = valentine,U+2665 ISOpub --> { "diams", "9830" }, //black diamond suit, U+2666 ISOpub --> // <!-- Latin Extended-A --> { "OElig", "338" }, // -- latin capital ligature OE,U+0152 ISOlat2 --> { "oelig", "339" }, // -- latin small ligature oe, U+0153 ISOlat2 --> // <!-- ligature is a misnomer, this is a separate character in some languages --> { "Scaron", "352" }, // -- latin capital letter S with caron,U+0160 ISOlat2 --> { "scaron", "353" }, // -- latin small letter s with caron,U+0161 ISOlat2 --> { "Yuml", "376" }, // -- latin capital letter Y with diaeresis,U+0178 ISOlat2 --> // <!-- Spacing Modifier Letters --> { "circ", "710" }, // -- modifier letter circumflex accent,U+02C6 ISOpub --> { "tilde", "732" }, //small tilde, U+02DC ISOdia --> // <!-- General Punctuation --> { "ensp", "8194" }, //en space, U+2002 ISOpub --> { "emsp", "8195" }, //em space, U+2003 ISOpub --> { "thinsp", "8201" }, //thin space, U+2009 ISOpub --> { "zwnj", "8204" }, //zero width non-joiner,U+200C NEW RFC 2070 --> { "zwj", "8205" }, //zero width joiner, U+200D NEW RFC 2070 --> { "lrm", "8206" }, //left-to-right mark, U+200E NEW RFC 2070 --> { "rlm", "8207" }, //right-to-left mark, U+200F NEW RFC 2070 --> { "ndash", "8211" }, //en dash, U+2013 ISOpub --> { "mdash", "8212" }, //em dash, U+2014 ISOpub --> { "lsquo", "8216" }, //left single quotation mark,U+2018 ISOnum --> { "rsquo", "8217" }, //right single quotation mark,U+2019 ISOnum --> { "sbquo", "8218" }, //single low-9 quotation mark, U+201A NEW --> { "ldquo", "8220" }, //left double quotation mark,U+201C ISOnum --> { "rdquo", "8221" }, //right double quotation mark,U+201D ISOnum --> { "bdquo", "8222" }, //double low-9 quotation mark, U+201E NEW --> { "dagger", "8224" }, //dagger, U+2020 ISOpub --> { "Dagger", "8225" }, //double dagger, U+2021 ISOpub --> { "permil", "8240" }, //per mille sign, U+2030 ISOtech --> { "lsaquo", "8249" }, //single left-pointing angle quotation mark,U+2039 ISO proposed --> // <!-- lsaquo is proposed but not yet ISO standardized --> { "rsaquo", "8250" }, //single right-pointing angle quotation mark,U+203A ISO proposed --> // <!-- rsaquo is proposed but not yet ISO standardized --> { "euro", "8364" }, // -- euro sign, U+20AC NEW --> }; /** * <p>The set of entities supported by standard XML.</p> */ public static final Entities XML; /** * <p>The set of entities supported by HTML 3.2.</p> */ public static final Entities HTML32; /** * <p>The set of entities supported by HTML 4.0.</p> */ public static final Entities HTML40; static { XML = new Entities(); XML.addEntities(BASIC_ARRAY); XML.addEntities(APOS_ARRAY); } static { HTML32 = new Entities(); HTML32.addEntities(BASIC_ARRAY); HTML32.addEntities(ISO8859_1_ARRAY); } static { HTML40 = new Entities(); fillWithHtml40Entities(HTML40); } static void fillWithHtml40Entities(Entities entities) { entities.addEntities(BASIC_ARRAY); entities.addEntities(ISO8859_1_ARRAY); entities.addEntities(HTML40_ARRAY); } static interface EntityMap { void add(String name, int value); String name(int value); int value(String name); } static class PrimitiveEntityMap implements EntityMap { private Map mapNameToValue = new HashMap(); private IntHashMap mapValueToName = new IntHashMap(); public void add(String name, int value) { mapNameToValue.put(name, new Integer(value)); mapValueToName.put(value, name); } public String name(int value) { return (String) mapValueToName.get(value); } public int value(String name) { Object value = mapNameToValue.get(name); if (value == null) { return -1; } return ((Integer) value).intValue(); } } static abstract class MapIntMap implements Entities.EntityMap { protected Map mapNameToValue; protected Map mapValueToName; public void add(String name, int value) { mapNameToValue.put(name, new Integer(value)); mapValueToName.put(new Integer(value), name); } public String name(int value) { return (String) mapValueToName.get(new Integer(value)); } public int value(String name) { Object value = mapNameToValue.get(name); if (value == null) { return -1; } return ((Integer) value).intValue(); } } static class HashEntityMap extends MapIntMap { public HashEntityMap() { mapNameToValue = new HashMap(); mapValueToName = new HashMap(); } } static class TreeEntityMap extends MapIntMap { public TreeEntityMap() { mapNameToValue = new TreeMap(); mapValueToName = new TreeMap(); } } static class LookupEntityMap extends PrimitiveEntityMap { private String[] lookupTable; private int LOOKUP_TABLE_SIZE = 256; public String name(int value) { if (value < LOOKUP_TABLE_SIZE) { return lookupTable()[value]; } return super.name(value); } private String[] lookupTable() { if (lookupTable == null) { createLookupTable(); } return lookupTable; } private void createLookupTable() { lookupTable = new String[LOOKUP_TABLE_SIZE]; for (int i = 0; i < LOOKUP_TABLE_SIZE; ++i) { lookupTable[i] = super.name(i); } } } static class ArrayEntityMap implements EntityMap { protected int growBy = 100; protected int size = 0; protected String[] names; protected int[] values; public ArrayEntityMap() { names = new String[growBy]; values = new int[growBy]; } public ArrayEntityMap(int growBy) { this.growBy = growBy; names = new String[growBy]; values = new int[growBy]; } public void add(String name, int value) { ensureCapacity(size + 1); names[size] = name; values[size] = value; size++; } protected void ensureCapacity(int capacity) { if (capacity > names.length) { int newSize = Math.max(capacity, size + growBy); String[] newNames = new String[newSize]; System.arraycopy(names, 0, newNames, 0, size); names = newNames; int[] newValues = new int[newSize]; System.arraycopy(values, 0, newValues, 0, size); values = newValues; } } public String name(int value) { for (int i = 0; i < size; ++i) { if (values[i] == value) { return names[i]; } } return null; } public int value(String name) { for (int i = 0; i < size; ++i) { if (names[i].equals(name)) { return values[i]; } } return -1; } } static class BinaryEntityMap extends ArrayEntityMap { public BinaryEntityMap() { } public BinaryEntityMap(int growBy) { super(growBy); } // based on code in java.util.Arrays private int binarySearch(int key) { int low = 0; int high = size - 1; while (low <= high) { int mid = (low + high) >> 1; int midVal = values[mid]; if (midVal < key) { low = mid + 1; } else if (midVal > key) { high = mid - 1; } else { return mid; // key found } } return -(low + 1); // key not found. } public void add(String name, int value) { ensureCapacity(size + 1); int insertAt = binarySearch(value); if (insertAt > 0) { return; // note: this means you can't insert the same value twice } insertAt = -(insertAt + 1); // binarySearch returns it negative and off-by-one System.arraycopy(values, insertAt, values, insertAt + 1, size - insertAt); values[insertAt] = value; System.arraycopy(names, insertAt, names, insertAt + 1, size - insertAt); names[insertAt] = name; size++; } public String name(int value) { int index = binarySearch(value); if (index < 0) { return null; } return names[index]; } } // package scoped for testing EntityMap map = new Entities.LookupEntityMap(); public void addEntities(String[][] entityArray) { for (int i = 0; i < entityArray.length; ++i) { addEntity(entityArray[i][0], Integer.parseInt(entityArray[i][1])); } } public void addEntity(String name, int value) { map.add(name, value); } public String entityName(int value) { return map.name(value); } public int entityValue(String name) { return map.value(name); } /** * <p>Escapes the characters in a <code>String</code>.</p> * * <p>For example, if you have called addEntity("foo", 0xA1), * escape("\u00A1") will return "&foo;"</p> * * @param str The <code>String</code> to escape. * @return A new escaped <code>String</code>. */ public String escape(String str) { //todo: rewrite to use a Writer StringBuffer buf = new StringBuffer(str.length() * 2); int i; for (i = 0; i < str.length(); ++i) { char ch = str.charAt(i); String entityName = this.entityName(ch); if (entityName == null) { if (ch > 0x7F) { int intValue = ch; buf.append("&#"); buf.append(intValue); buf.append(';'); } else { buf.append(ch); } } else { buf.append('&'); buf.append(entityName); buf.append(';'); } } return buf.toString(); } /** * <p>Unescapes the entities in a <code>String</code>.</p> * * <p>For example, if you have called addEntity("foo", 0xA1), * unescape("&foo;") will return "\u00A1"</p> * * @param str The <code>String</code> to escape. * @return A new escaped <code>String</code>. */ public String unescape(String str) { StringBuffer buf = new StringBuffer(str.length()); int i; for (i = 0; i < str.length(); ++i) { char ch = str.charAt(i); if (ch == '&') { int semi = str.indexOf(';', i + 1); if (semi == -1) { buf.append(ch); continue; } String entityName = str.substring(i + 1, semi); int entityValue; if (entityName.charAt(0) == '#') { char charAt1 = entityName.charAt(1); if (charAt1 == 'x' || charAt1 == 'X') { entityValue = Integer.valueOf(entityName.substring(2), 16).intValue(); } else { entityValue = Integer.parseInt(entityName.substring(1)); } } else { entityValue = this.entityValue(entityName); } if (entityValue == -1) { buf.append('&'); buf.append(entityName); buf.append(';'); } else { buf.append((char) (entityValue)); } i = semi; } else { buf.append(ch); } } return buf.toString(); } }