/**
* Copyright (C) 2011-2015 The XDocReport Team <xdocreport@googlegroups.com>
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fr.opensagres.xdocreport.utils;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;
public class StringEscapeUtils
{
// --------------------------------------------------------------------------
/**
* <p>
* Escapes the characters in a <code>String</code> using HTML entities.
* </p>
* <p>
* For example:
* </p>
* <p>
* <code>"bread" & "butter"</code>
* </p>
* becomes:
* <p>
* <code>"bread" & "butter"</code> .
* </p>
* <p>
* Supports all known HTML 4.0 entities, including funky accents. Note that the commonly used apostrophe escape
* character (') is not a legal entity and so is not supported).
* </p>
*
* @param str the <code>String</code> to escape, may be null
* @return a new escaped <code>String</code>, <code>null</code> if null string input
* @see #unescapeHtml(String)
* @see <a href="http://hotwired.lycos.com/webmonkey/reference/special_characters/">ISO Entities</a>
* @see <a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character Entities for ISO Latin-1</a>
* @see <a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0 Character entity references</a>
* @see <a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01 Character References</a>
* @see <a href="http://www.w3.org/TR/html401/charset.html#code-position">HTML 4.01 Code positions</a>
*/
public static String escapeHtml( String str )
{
if ( str == null )
{
return null;
}
try
{
StringWriter writer = new StringWriter( (int) ( str.length() * 1.5 ) );
escapeHtml( writer, str );
return writer.toString();
}
catch ( IOException e )
{
// assert false;
// should be impossible
e.printStackTrace();
return null;
}
}
/**
* <p>
* Escapes the characters in a <code>String</code> using HTML entities and writes them to a <code>Writer</code>.
* </p>
* <p>
* For example:
* </p>
* <code>"bread" & "butter"</code>
* <p>
* becomes:
* </p>
* <code>"bread" & "butter"</code> .
* <p>
* Supports all known HTML 4.0 entities, including funky accents. Note that the commonly used apostrophe escape
* character (') is not a legal entity and so is not supported).
* </p>
*
* @param writer the writer receiving the escaped string, not null
* @param string the <code>String</code> to escape, may be null
* @throws IllegalArgumentException if the writer is null
* @throws IOException when <code>Writer</code> passed throws the exception from calls to the
* {@link Writer#write(int)} methods.
* @see #escapeHtml(String)
* @see #unescapeHtml(String)
* @see <a href="http://hotwired.lycos.com/webmonkey/reference/special_characters/">ISO Entities</a>
* @see <a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character Entities for ISO Latin-1</a>
* @see <a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0 Character entity references</a>
* @see <a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01 Character References</a>
* @see <a href="http://www.w3.org/TR/html401/charset.html#code-position">HTML 4.01 Code positions</a>
*/
public static void escapeHtml( Writer writer, String string )
throws IOException
{
if ( writer == null )
{
throw new IllegalArgumentException( "The Writer must not be null." );
}
if ( string == null )
{
return;
}
Entities.HTML40.escape( writer, string );
}
/**
* <p>
* Provides HTML and XML entity utilities.
* </p>
*
* @see <a href="http://hotwired.lycos.com/webmonkey/reference/special_characters/">ISO Entities</a>
* @see <a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character Entities for ISO Latin-1</a>
* @see <a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0 Character entity references</a>
* @see <a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01 Character References</a>
* @see <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 636641 2008-03-13 06:11:30Z bayard $
*/
static 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'
// arrow but 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 );
}
/**
* <p>
* Fills the specified entities instance with HTML 40 entities.
* </p>
*
* @param entities the instance to be filled.
*/
static void fillWithHtml40Entities( Entities entities )
{
entities.addEntities( BASIC_ARRAY );
entities.addEntities( ISO8859_1_ARRAY );
entities.addEntities( HTML40_ARRAY );
}
static interface EntityMap
{
/**
* <p>
* Add an entry to this entity map.
* </p>
*
* @param name the entity name
* @param value the entity value
*/
void add( String name, int value );
/**
* <p>
* Returns the name of the entity identified by the specified value.
* </p>
*
* @param value the value to locate
* @return entity name associated with the specified value
*/
String name( int value );
/**
* <p>
* Returns the value of the entity identified by the specified name.
* </p>
*
* @param name the name to locate
* @return entity value associated with the specified name
*/
int value( String name );
}
static class PrimitiveEntityMap
implements EntityMap
{
private Map<String, Integer> mapNameToValue = new HashMap<String, Integer>();
private IntHashMap mapValueToName = new IntHashMap();
/**
* {@inheritDoc}
*/
public void add( String name, int value )
{
mapNameToValue.put( name, new Integer( value ) );
mapValueToName.put( value, name );
}
/**
* {@inheritDoc}
*/
public String name( int value )
{
return (String) mapValueToName.get( value );
}
/**
* {@inheritDoc}
*/
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<String, Integer> mapNameToValue;
protected Map<Integer, String> mapValueToName;
/**
* {@inheritDoc}
*/
public void add( String name, int value )
{
mapNameToValue.put( name, value );
mapValueToName.put( value, name );
}
/**
* {@inheritDoc}
*/
public String name( int value )
{
return (String) mapValueToName.get( new Integer( value ) );
}
/**
* {@inheritDoc}
*/
public int value( String name )
{
Object value = mapNameToValue.get( name );
if ( value == null )
{
return -1;
}
return ( (Integer) value ).intValue();
}
}
static class HashEntityMap
extends MapIntMap
{
/**
* Constructs a new instance of <code>HashEntityMap</code>.
*/
public HashEntityMap()
{
mapNameToValue = new HashMap<String, Integer>();
mapValueToName = new HashMap<Integer, String>();
}
}
static class TreeEntityMap
extends MapIntMap
{
/**
* Constructs a new instance of <code>TreeEntityMap</code>.
*/
public TreeEntityMap()
{
mapNameToValue = new TreeMap<String, Integer>();
mapValueToName = new TreeMap<Integer, String>();
}
}
static class LookupEntityMap
extends PrimitiveEntityMap
{
private String[] lookupTable;
private int LOOKUP_TABLE_SIZE = 256;
/**
* {@inheritDoc}
*/
public String name( int value )
{
if ( value < LOOKUP_TABLE_SIZE )
{
return lookupTable()[value];
}
return super.name( value );
}
/**
* <p>
* Returns the lookup table for this entity map. The lookup table is created if it has not been previously.
* </p>
*
* @return the lookup table
*/
private String[] lookupTable()
{
if ( lookupTable == null )
{
createLookupTable();
}
return lookupTable;
}
/**
* <p>
* Creates an entity lookup table of LOOKUP_TABLE_SIZE elements, initialized with entity names.
* </p>
*/
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;
/**
* Constructs a new instance of <code>ArrayEntityMap</code>.
*/
public ArrayEntityMap()
{
names = new String[growBy];
values = new int[growBy];
}
/**
* Constructs a new instance of <code>ArrayEntityMap</code> specifying the size by which the array should
* grow.
*
* @param growBy array will be initialized to and will grow by this amount
*/
public ArrayEntityMap( int growBy )
{
this.growBy = growBy;
names = new String[growBy];
values = new int[growBy];
}
/**
* {@inheritDoc}
*/
public void add( String name, int value )
{
ensureCapacity( size + 1 );
names[size] = name;
values[size] = value;
size++;
}
/**
* Verifies the capacity of the entity array, adjusting the size if necessary.
*
* @param capacity size the array should be
*/
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;
}
}
/**
* {@inheritDoc}
*/
public String name( int value )
{
for ( int i = 0; i < size; ++i )
{
if ( values[i] == value )
{
return names[i];
}
}
return null;
}
/**
* {@inheritDoc}
*/
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
{
/**
* Constructs a new instance of <code>BinaryEntityMap</code>.
*/
public BinaryEntityMap()
{
super();
}
/**
* Constructs a new instance of <code>ArrayEntityMap</code> specifying the size by which the underlying
* array should grow.
*
* @param growBy array will be initialized to and will grow by this amount
*/
public BinaryEntityMap( int growBy )
{
super( growBy );
}
/**
* Performs a binary search of the entity array for the specified key. This method is based on code in
* {@link java.util.Arrays}.
*
* @param key the key to be found
* @return the index of the entity array matching the specified key
*/
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.
}
/**
* {@inheritDoc}
*/
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++;
}
/**
* {@inheritDoc}
*/
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();
/**
* <p>
* Adds entities to this entity.
* </p>
*
* @param entityArray array of entities to be added
*/
public void addEntities( String[][] entityArray )
{
for ( int i = 0; i < entityArray.length; ++i )
{
addEntity( entityArray[i][0], Integer.parseInt( entityArray[i][1] ) );
}
}
/**
* <p>
* Add an entity to this entity.
* </p>
*
* @param name name of the entity
* @param value vale of the entity
*/
public void addEntity( String name, int value )
{
map.add( name, value );
}
/**
* <p>
* Returns the name of the entity identified by the specified value.
* </p>
*
* @param value the value to locate
* @return entity name associated with the specified value
*/
public String entityName( int value )
{
return map.name( value );
}
/**
* <p>
* Returns the value of the entity identified by the specified name.
* </p>
*
* @param name the name to locate
* @return entity value associated with the specified name
*/
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 )
{
StringWriter stringWriter = createStringWriter( str );
try
{
this.escape( stringWriter, str );
}
catch ( IOException e )
{
// This should never happen because ALL the StringWriter methods
// called by #escape(Writer, String) do not
// throw IOExceptions.
// throw new UnhandledException(e);
throw new RuntimeException( e );
}
return stringWriter.toString();
}
/**
* <p>
* Escapes the characters in the <code>String</code> passed and writes the result to the <code>Writer</code>
* passed.
* </p>
*
* @param writer The <code>Writer</code> to write the results of the escaping to. Assumed to be a non-null
* value.
* @param str The <code>String</code> to escape. Assumed to be a non-null value.
* @throws IOException when <code>Writer</code> passed throws the exception from calls to the
* {@link Writer#write(int)} methods.
* @see #escape(String)
* @see Writer
*/
public void escape( Writer writer, String str )
throws IOException
{
int len = str.length();
for ( int i = 0; i < len; i++ )
{
char c = str.charAt( i );
String entityName = this.entityName( c );
if ( entityName == null )
{
if ( c > 0x7F )
{
writer.write( "&#" );
writer.write( Integer.toString( c, 10 ) );
writer.write( ';' );
}
else
{
writer.write( c );
}
}
else
{
writer.write( '&' );
writer.write( entityName );
writer.write( ';' );
}
}
}
/**
* <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 )
{
int firstAmp = str.indexOf( '&' );
if ( firstAmp < 0 )
{
return str;
}
else
{
StringWriter stringWriter = createStringWriter( str );
try
{
this.doUnescape( stringWriter, str, firstAmp );
}
catch ( IOException e )
{
// This should never happen because ALL the StringWriter
// methods called by #escape(Writer, String)
// do not throw IOExceptions.
// throw new UnhandledException(e);
throw new RuntimeException( e );
}
return stringWriter.toString();
}
}
/**
* Make the StringWriter 10% larger than the source String to avoid growing the writer
*
* @param str The source string
* @return A newly created StringWriter
*/
private StringWriter createStringWriter( String str )
{
return new StringWriter( (int) ( str.length() + ( str.length() * 0.1 ) ) );
}
/**
* <p>
* Unescapes the escaped entities in the <code>String</code> passed and writes the result to the
* <code>Writer</code> passed.
* </p>
*
* @param writer The <code>Writer</code> to write the results to; assumed to be non-null.
* @param str The source <code>String</code> to unescape; assumed to be non-null.
* @throws IOException when <code>Writer</code> passed throws the exception from calls to the
* {@link Writer#write(int)} methods.
* @see #escape(String)
* @see Writer
*/
public void unescape( Writer writer, String str )
throws IOException
{
int firstAmp = str.indexOf( '&' );
if ( firstAmp < 0 )
{
writer.write( str );
return;
}
else
{
doUnescape( writer, str, firstAmp );
}
}
/**
* Underlying unescape method that allows the optimisation of not starting from the 0 index again.
*
* @param writer The <code>Writer</code> to write the results to; assumed to be non-null.
* @param str The source <code>String</code> to unescape; assumed to be non-null.
* @param firstAmp The <code>int</code> index of the first ampersand in the source String.
* @throws IOException when <code>Writer</code> passed throws the exception from calls to the
* {@link Writer#write(int)} methods.
*/
private void doUnescape( Writer writer, String str, int firstAmp )
throws IOException
{
writer.write( str, 0, firstAmp );
int len = str.length();
for ( int i = firstAmp; i < len; i++ )
{
char c = str.charAt( i );
if ( c == '&' )
{
int nextIdx = i + 1;
int semiColonIdx = str.indexOf( ';', nextIdx );
if ( semiColonIdx == -1 )
{
writer.write( c );
continue;
}
int amphersandIdx = str.indexOf( '&', i + 1 );
if ( amphersandIdx != -1 && amphersandIdx < semiColonIdx )
{
// Then the text looks like &...&...;
writer.write( c );
continue;
}
String entityContent = str.substring( nextIdx, semiColonIdx );
int entityValue = -1;
int entityContentLen = entityContent.length();
if ( entityContentLen > 0 )
{
if ( entityContent.charAt( 0 ) == '#' )
{ // escaped value
// content is an
// integer
// (decimal or
// hexidecimal)
if ( entityContentLen > 1 )
{
char isHexChar = entityContent.charAt( 1 );
try
{
switch ( isHexChar )
{
case 'X':
case 'x':
{
entityValue = Integer.parseInt( entityContent.substring( 2 ), 16 );
break;
}
default:
{
entityValue = Integer.parseInt( entityContent.substring( 1 ), 10 );
}
}
if ( entityValue > 0xFFFF )
{
entityValue = -1;
}
}
catch ( NumberFormatException e )
{
entityValue = -1;
}
}
}
else
{ // escaped value content is an entity name
entityValue = this.entityValue( entityContent );
}
}
if ( entityValue == -1 )
{
writer.write( '&' );
writer.write( entityContent );
writer.write( ';' );
}
else
{
writer.write( entityValue );
}
i = semiColonIdx; // move index up to the semi-colon
}
else
{
writer.write( c );
}
}
}
}
static/**
* <p>A hash map that uses primitive ints for the key rather than objects.</p>
*
* <p>Note that this class is for internal optimization purposes only, and may
* not be supported in future releases of Apache Commons Lang. Utilities of
* this sort may be included in future releases of Apache Commons Collections.</p>
*
* @author Justin Couch
* @author Alex Chaffee (alex@apache.org)
* @author Stephen Colebourne
* @since 2.0
* @version $Revision: 561230 $
* @see java.util.HashMap
*/
class IntHashMap
{
/**
* The hash table data.
*/
private transient Entry table[];
/**
* The total number of entries in the hash table.
*/
private transient int count;
/**
* The table is rehashed when its size exceeds this threshold. (The value of this field is (int)(capacity *
* loadFactor).)
*
* @serial
*/
private int threshold;
/**
* The load factor for the hashtable.
*
* @serial
*/
private float loadFactor;
/**
* <p>
* Innerclass that acts as a datastructure to create a new entry in the table.
* </p>
*/
private static class Entry
{
int hash;
// int key;
Object value;
Entry next;
/**
* <p>
* Create a new entry with the given values.
* </p>
*
* @param hash The code used to hash the object with
* @param key The key used to enter this in the table
* @param value The value for this key
* @param next A reference to the next entry in the table
*/
protected Entry( int hash, int key, Object value, Entry next )
{
this.hash = hash;
// this.key = key;
this.value = value;
this.next = next;
}
}
/**
* <p>
* Constructs a new, empty hashtable with a default capacity and load factor, which is <code>20</code> and
* <code>0.75</code> respectively.
* </p>
*/
public IntHashMap()
{
this( 20, 0.75f );
}
/**
* <p>
* Constructs a new, empty hashtable with the specified initial capacity and default load factor, which is
* <code>0.75</code>.
* </p>
*
* @param initialCapacity the initial capacity of the hashtable.
* @throws IllegalArgumentException if the initial capacity is less than zero.
*/
public IntHashMap( int initialCapacity )
{
this( initialCapacity, 0.75f );
}
/**
* <p>
* Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.
* </p>
*
* @param initialCapacity the initial capacity of the hashtable.
* @param loadFactor the load factor of the hashtable.
* @throws IllegalArgumentException if the initial capacity is less than zero, or if the load factor is
* nonpositive.
*/
public IntHashMap( int initialCapacity, float loadFactor )
{
super();
if ( initialCapacity < 0 )
{
throw new IllegalArgumentException( "Illegal Capacity: " + initialCapacity );
}
if ( loadFactor <= 0 )
{
throw new IllegalArgumentException( "Illegal Load: " + loadFactor );
}
if ( initialCapacity == 0 )
{
initialCapacity = 1;
}
this.loadFactor = loadFactor;
table = new Entry[initialCapacity];
threshold = (int) ( initialCapacity * loadFactor );
}
/**
* <p>
* Returns the number of keys in this hashtable.
* </p>
*
* @return the number of keys in this hashtable.
*/
public int size()
{
return count;
}
/**
* <p>
* Tests if this hashtable maps no keys to values.
* </p>
*
* @return <code>true</code> if this hashtable maps no keys to values; <code>false</code> otherwise.
*/
public boolean isEmpty()
{
return count == 0;
}
/**
* <p>
* Tests if some key maps into the specified value in this hashtable. This operation is more expensive than the
* <code>containsKey</code> method.
* </p>
* <p>
* Note that this method is identical in functionality to containsValue, (which is part of the Map interface in
* the collections framework).
* </p>
*
* @param value a value to search for.
* @return <code>true</code> if and only if some key maps to the <code>value</code> argument in this hashtable
* as determined by the <tt>equals</tt> method; <code>false</code> otherwise.
* @throws NullPointerException if the value is <code>null</code>.
* @see #containsKey(int)
* @see #containsValue(Object)
* @see java.util.Map
*/
public boolean contains( Object value )
{
if ( value == null )
{
throw new NullPointerException();
}
Entry tab[] = table;
for ( int i = tab.length; i-- > 0; )
{
for ( Entry e = tab[i]; e != null; e = e.next )
{
if ( e.value.equals( value ) )
{
return true;
}
}
}
return false;
}
/**
* <p>
* Returns <code>true</code> if this HashMap maps one or more keys to this value.
* </p>
* <p>
* Note that this method is identical in functionality to contains (which predates the Map interface).
* </p>
*
* @param value value whose presence in this HashMap is to be tested.
* @return boolean <code>true</code> if the value is contained
* @see java.util.Map
* @since JDK1.2
*/
public boolean containsValue( Object value )
{
return contains( value );
}
/**
* <p>
* Tests if the specified object is a key in this hashtable.
* </p>
*
* @param key possible key.
* @return <code>true</code> if and only if the specified object is a key in this hashtable, as determined by
* the <tt>equals</tt> method; <code>false</code> otherwise.
* @see #contains(Object)
*/
public boolean containsKey( int key )
{
Entry tab[] = table;
int hash = key;
int index = ( hash & 0x7FFFFFFF ) % tab.length;
for ( Entry e = tab[index]; e != null; e = e.next )
{
if ( e.hash == hash )
{
return true;
}
}
return false;
}
/**
* <p>
* Returns the value to which the specified key is mapped in this map.
* </p>
*
* @param key a key in the hashtable.
* @return the value to which the key is mapped in this hashtable; <code>null</code> if the key is not mapped to
* any value in this hashtable.
* @see #put(int, Object)
*/
public Object get( int key )
{
Entry tab[] = table;
int hash = key;
int index = ( hash & 0x7FFFFFFF ) % tab.length;
for ( Entry e = tab[index]; e != null; e = e.next )
{
if ( e.hash == hash )
{
return e.value;
}
}
return null;
}
/**
* <p>
* Increases the capacity of and internally reorganizes this hashtable, in order to accommodate and access its
* entries more efficiently.
* </p>
* <p>
* This method is called automatically when the number of keys in the hashtable exceeds this hashtable's
* capacity and load factor.
* </p>
*/
protected void rehash()
{
int oldCapacity = table.length;
Entry oldMap[] = table;
int newCapacity = oldCapacity * 2 + 1;
Entry newMap[] = new Entry[newCapacity];
threshold = (int) ( newCapacity * loadFactor );
table = newMap;
for ( int i = oldCapacity; i-- > 0; )
{
for ( Entry old = oldMap[i]; old != null; )
{
Entry e = old;
old = old.next;
int index = ( e.hash & 0x7FFFFFFF ) % newCapacity;
e.next = newMap[index];
newMap[index] = e;
}
}
}
/**
* <p>
* Maps the specified <code>key</code> to the specified <code>value</code> in this hashtable. The key cannot be
* <code>null</code>.
* </p>
* <p>
* The value can be retrieved by calling the <code>get</code> method with a key that is equal to the original
* key.
* </p>
*
* @param key the hashtable key.
* @param value the value.
* @return the previous value of the specified key in this hashtable, or <code>null</code> if it did not have
* one.
* @throws NullPointerException if the key is <code>null</code>.
* @see #get(int)
*/
public Object put( int key, Object value )
{
// Makes sure the key is not already in the hashtable.
Entry tab[] = table;
int hash = key;
int index = ( hash & 0x7FFFFFFF ) % tab.length;
for ( Entry e = tab[index]; e != null; e = e.next )
{
if ( e.hash == hash )
{
Object old = e.value;
e.value = value;
return old;
}
}
if ( count >= threshold )
{
// Rehash the table if the threshold is exceeded
rehash();
tab = table;
index = ( hash & 0x7FFFFFFF ) % tab.length;
}
// Creates the new entry.
Entry e = new Entry( hash, key, value, tab[index] );
tab[index] = e;
count++;
return null;
}
/**
* <p>
* Removes the key (and its corresponding value) from this hashtable.
* </p>
* <p>
* This method does nothing if the key is not present in the hashtable.
* </p>
*
* @param key the key that needs to be removed.
* @return the value to which the key had been mapped in this hashtable, or <code>null</code> if the key did not
* have a mapping.
*/
public Object remove( int key )
{
Entry tab[] = table;
int hash = key;
int index = ( hash & 0x7FFFFFFF ) % tab.length;
for ( Entry e = tab[index], prev = null; e != null; prev = e, e = e.next )
{
if ( e.hash == hash )
{
if ( prev != null )
{
prev.next = e.next;
}
else
{
tab[index] = e.next;
}
count--;
Object oldValue = e.value;
e.value = null;
return oldValue;
}
}
return null;
}
/**
* <p>
* Clears this hashtable so that it contains no keys.
* </p>
*/
public synchronized void clear()
{
Entry tab[] = table;
for ( int index = tab.length; --index >= 0; )
{
tab[index] = null;
}
count = 0;
}
}
}