/**
*******************************************************************************
* Copyright (C) 1996-2007, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
// copied from the Transliterator demo
package com.ibm.icu.dev.test.util;
import java.util.*;
import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.text.UTF16;
import com.ibm.icu.text.Transliterator;
import com.ibm.icu.text.UnicodeSet;
/**
* Incrementally returns the set of all strings that case-fold to the same value.
*/
public class CaseIterator {
// testing stuff
private static Transliterator toName = Transliterator.getInstance("[:^ascii:] Any-Name");
private static Transliterator toHex = Transliterator.getInstance("[:^ascii:] Any-Hex");
private static Transliterator toHex2 = Transliterator.getInstance("[[^\u0021-\u007F]-[,]] Any-Hex");
// global tables (could be precompiled)
private static Map fromCaseFold = new HashMap();
private static Map toCaseFold = new HashMap();
private static int maxLength = 0;
// This exception list is generated on the console by turning on the GENERATED flag,
// which MUST be false for normal operation.
// Once the list is generated, it is pasted in here.
// A bit of a cludge, but this bootstrapping is the easiest way
// to get around certain complications in the data.
private static final boolean GENERATE = false;
private static final boolean DUMP = false;
private static String[][] exceptionList = {
// a\N{MODIFIER LETTER RIGHT HALF RING}
{"a\u02BE","A\u02BE","a\u02BE",},
// ff
{"ff","FF","Ff","fF","ff",},
// ffi
{"ffi","FFI","FFi","FfI","Ffi","F\uFB01","fFI","fFi","ffI","ffi","f\uFB01","\uFB00I","\uFB00i",},
// ffl
{"ffl","FFL","FFl","FfL","Ffl","F\uFB02","fFL","fFl","ffL","ffl","f\uFB02","\uFB00L","\uFB00l",},
// fi
{"fi","FI","Fi","fI","fi",},
// fl
{"fl","FL","Fl","fL","fl",},
// h\N{COMBINING MACRON BELOW}
{"h\u0331","H\u0331","h\u0331",},
// i\N{COMBINING DOT ABOVE}
{"i\u0307","I\u0307","i\u0307",},
// j\N{COMBINING CARON}
{"j\u030C","J\u030C","j\u030C",},
// ss
{"ss","SS","Ss","S\u017F","sS","ss","s\u017F","\u017FS","\u017Fs","\u017F\u017F",},
// st
{"st","ST","St","sT","st","\u017FT","\u017Ft",},
// t\N{COMBINING DIAERESIS}
{"t\u0308","T\u0308","t\u0308",},
// w\N{COMBINING RING ABOVE}
{"w\u030A","W\u030A","w\u030A",},
// y\N{COMBINING RING ABOVE}
{"y\u030A","Y\u030A","y\u030A",},
// \N{MODIFIER LETTER APOSTROPHE}n
{"\u02BCn","\u02BCN","\u02BCn",},
// \N{GREEK SMALL LETTER ALPHA WITH TONOS}\N{GREEK SMALL LETTER IOTA}
{"\u03AC\u03B9","\u0386\u0345","\u0386\u0399","\u0386\u03B9","\u0386\u1FBE","\u03AC\u0345","\u03AC\u0399","\u03AC\u03B9","\u03AC\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH TONOS}\N{GREEK SMALL LETTER IOTA}
{"\u03AE\u03B9","\u0389\u0345","\u0389\u0399","\u0389\u03B9","\u0389\u1FBE","\u03AE\u0345","\u03AE\u0399","\u03AE\u03B9","\u03AE\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA}\N{COMBINING GREEK PERISPOMENI}
{"\u03B1\u0342","\u0391\u0342","\u03B1\u0342",},
// \N{GREEK SMALL LETTER ALPHA}\N{COMBINING GREEK PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u03B1\u0342\u03B9","\u0391\u0342\u0345","\u0391\u0342\u0399","\u0391\u0342\u03B9","\u0391\u0342\u1FBE",
"\u03B1\u0342\u0345","\u03B1\u0342\u0399","\u03B1\u0342\u03B9","\u03B1\u0342\u1FBE","\u1FB6\u0345",
"\u1FB6\u0399","\u1FB6\u03B9","\u1FB6\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA}\N{GREEK SMALL LETTER IOTA}
{"\u03B1\u03B9","\u0391\u0345","\u0391\u0399","\u0391\u03B9","\u0391\u1FBE","\u03B1\u0345","\u03B1\u0399","\u03B1\u03B9","\u03B1\u1FBE",},
// \N{GREEK SMALL LETTER ETA}\N{COMBINING GREEK PERISPOMENI}
{"\u03B7\u0342","\u0397\u0342","\u03B7\u0342",},
// \N{GREEK SMALL LETTER ETA}\N{COMBINING GREEK PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u03B7\u0342\u03B9","\u0397\u0342\u0345","\u0397\u0342\u0399","\u0397\u0342\u03B9","\u0397\u0342\u1FBE",
"\u03B7\u0342\u0345","\u03B7\u0342\u0399","\u03B7\u0342\u03B9","\u03B7\u0342\u1FBE","\u1FC6\u0345","\u1FC6\u0399",
"\u1FC6\u03B9","\u1FC6\u1FBE",},
// \N{GREEK SMALL LETTER ETA}\N{GREEK SMALL LETTER IOTA}
{"\u03B7\u03B9","\u0397\u0345","\u0397\u0399","\u0397\u03B9","\u0397\u1FBE","\u03B7\u0345","\u03B7\u0399","\u03B7\u03B9","\u03B7\u1FBE",},
// \N{GREEK SMALL LETTER IOTA}\N{COMBINING DIAERESIS}\N{COMBINING GRAVE ACCENT}
{"\u03B9\u0308\u0300","\u0345\u0308\u0300","\u0399\u0308\u0300","\u03B9\u0308\u0300","\u1FBE\u0308\u0300",},
// \N{GREEK SMALL LETTER IOTA}\N{COMBINING DIAERESIS}\N{COMBINING ACUTE ACCENT}
{"\u03B9\u0308\u0301","\u0345\u0308\u0301","\u0399\u0308\u0301","\u03B9\u0308\u0301","\u1FBE\u0308\u0301",},
// \N{GREEK SMALL LETTER IOTA}\N{COMBINING DIAERESIS}\N{COMBINING GREEK PERISPOMENI}
{"\u03B9\u0308\u0342","\u0345\u0308\u0342","\u0399\u0308\u0342","\u03B9\u0308\u0342","\u1FBE\u0308\u0342",},
// \N{GREEK SMALL LETTER IOTA}\N{COMBINING GREEK PERISPOMENI}
{"\u03B9\u0342","\u0345\u0342","\u0399\u0342","\u03B9\u0342","\u1FBE\u0342",},
// \N{GREEK SMALL LETTER RHO}\N{COMBINING COMMA ABOVE}
{"\u03C1\u0313","\u03A1\u0313","\u03C1\u0313","\u03F1\u0313",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING DIAERESIS}\N{COMBINING GRAVE ACCENT}
{"\u03C5\u0308\u0300","\u03A5\u0308\u0300","\u03C5\u0308\u0300",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING DIAERESIS}\N{COMBINING ACUTE ACCENT}
{"\u03C5\u0308\u0301","\u03A5\u0308\u0301","\u03C5\u0308\u0301",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING DIAERESIS}\N{COMBINING GREEK PERISPOMENI}
{"\u03C5\u0308\u0342","\u03A5\u0308\u0342","\u03C5\u0308\u0342",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING COMMA ABOVE}
{"\u03C5\u0313","\u03A5\u0313","\u03C5\u0313",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING COMMA ABOVE}\N{COMBINING GRAVE ACCENT}
{"\u03C5\u0313\u0300","\u03A5\u0313\u0300","\u03C5\u0313\u0300","\u1F50\u0300",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING COMMA ABOVE}\N{COMBINING ACUTE ACCENT}
{"\u03C5\u0313\u0301","\u03A5\u0313\u0301","\u03C5\u0313\u0301","\u1F50\u0301",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING COMMA ABOVE}\N{COMBINING GREEK PERISPOMENI}
{"\u03C5\u0313\u0342","\u03A5\u0313\u0342","\u03C5\u0313\u0342","\u1F50\u0342",},
// \N{GREEK SMALL LETTER UPSILON}\N{COMBINING GREEK PERISPOMENI}
{"\u03C5\u0342","\u03A5\u0342","\u03C5\u0342",},
// \N{GREEK SMALL LETTER OMEGA}\N{COMBINING GREEK PERISPOMENI}
{"\u03C9\u0342","\u03A9\u0342","\u03C9\u0342","\u2126\u0342",},
// \N{GREEK SMALL LETTER OMEGA}\N{COMBINING GREEK PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u03C9\u0342\u03B9","\u03A9\u0342\u0345","\u03A9\u0342\u0399","\u03A9\u0342\u03B9","\u03A9\u0342\u1FBE","\u03C9\u0342\u0345","\u03C9\u0342\u0399","\u03C9\u0342\u03B9","\u03C9\u0342\u1FBE","\u1FF6\u0345",
"\u1FF6\u0399","\u1FF6\u03B9","\u1FF6\u1FBE","\u2126\u0342\u0345","\u2126\u0342\u0399","\u2126\u0342\u03B9","\u2126\u0342\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA}\N{GREEK SMALL LETTER IOTA}
{"\u03C9\u03B9","\u03A9\u0345","\u03A9\u0399","\u03A9\u03B9","\u03A9\u1FBE","\u03C9\u0345","\u03C9\u0399","\u03C9\u03B9","\u03C9\u1FBE","\u2126\u0345","\u2126\u0399","\u2126\u03B9","\u2126\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH TONOS}\N{GREEK SMALL LETTER IOTA}
{"\u03CE\u03B9","\u038F\u0345","\u038F\u0399","\u038F\u03B9","\u038F\u1FBE","\u03CE\u0345","\u03CE\u0399","\u03CE\u03B9","\u03CE\u1FBE",},
// \N{ARMENIAN SMALL LETTER ECH}\N{ARMENIAN SMALL LETTER YIWN}
{"\u0565\u0582","\u0535\u0552","\u0535\u0582","\u0565\u0552","\u0565\u0582",},
// \N{ARMENIAN SMALL LETTER MEN}\N{ARMENIAN SMALL LETTER ECH}
{"\u0574\u0565","\u0544\u0535","\u0544\u0565","\u0574\u0535","\u0574\u0565",},
// \N{ARMENIAN SMALL LETTER MEN}\N{ARMENIAN SMALL LETTER INI}
{"\u0574\u056B","\u0544\u053B","\u0544\u056B","\u0574\u053B","\u0574\u056B",},
// \N{ARMENIAN SMALL LETTER MEN}\N{ARMENIAN SMALL LETTER XEH}
{"\u0574\u056D","\u0544\u053D","\u0544\u056D","\u0574\u053D","\u0574\u056D",},
// \N{ARMENIAN SMALL LETTER MEN}\N{ARMENIAN SMALL LETTER NOW}
{"\u0574\u0576","\u0544\u0546","\u0544\u0576","\u0574\u0546","\u0574\u0576",},
// \N{ARMENIAN SMALL LETTER VEW}\N{ARMENIAN SMALL LETTER NOW}
{"\u057E\u0576","\u054E\u0546","\u054E\u0576","\u057E\u0546","\u057E\u0576",},
// \N{GREEK SMALL LETTER ALPHA WITH PSILI}\N{GREEK SMALL LETTER IOTA}
{"\u1F00\u03B9","\u1F00\u0345","\u1F00\u0399","\u1F00\u03B9","\u1F00\u1FBE","\u1F08\u0345","\u1F08\u0399","\u1F08\u03B9","\u1F08\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH DASIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F01\u03B9","\u1F01\u0345","\u1F01\u0399","\u1F01\u03B9","\u1F01\u1FBE","\u1F09\u0345","\u1F09\u0399","\u1F09\u03B9","\u1F09\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH PSILI AND VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F02\u03B9","\u1F02\u0345","\u1F02\u0399","\u1F02\u03B9","\u1F02\u1FBE","\u1F0A\u0345","\u1F0A\u0399","\u1F0A\u03B9","\u1F0A\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH DASIA AND VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F03\u03B9","\u1F03\u0345","\u1F03\u0399","\u1F03\u03B9","\u1F03\u1FBE","\u1F0B\u0345","\u1F0B\u0399","\u1F0B\u03B9","\u1F0B\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH PSILI AND OXIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F04\u03B9","\u1F04\u0345","\u1F04\u0399","\u1F04\u03B9","\u1F04\u1FBE","\u1F0C\u0345","\u1F0C\u0399","\u1F0C\u03B9","\u1F0C\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH DASIA AND OXIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F05\u03B9","\u1F05\u0345","\u1F05\u0399","\u1F05\u03B9","\u1F05\u1FBE","\u1F0D\u0345","\u1F0D\u0399","\u1F0D\u03B9","\u1F0D\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH PSILI AND PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u1F06\u03B9","\u1F06\u0345","\u1F06\u0399","\u1F06\u03B9","\u1F06\u1FBE","\u1F0E\u0345","\u1F0E\u0399","\u1F0E\u03B9","\u1F0E\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH DASIA AND PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u1F07\u03B9","\u1F07\u0345","\u1F07\u0399","\u1F07\u03B9","\u1F07\u1FBE","\u1F0F\u0345","\u1F0F\u0399","\u1F0F\u03B9","\u1F0F\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH PSILI}\N{GREEK SMALL LETTER IOTA}
{"\u1F20\u03B9","\u1F20\u0345","\u1F20\u0399","\u1F20\u03B9","\u1F20\u1FBE","\u1F28\u0345","\u1F28\u0399","\u1F28\u03B9","\u1F28\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH DASIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F21\u03B9","\u1F21\u0345","\u1F21\u0399","\u1F21\u03B9","\u1F21\u1FBE","\u1F29\u0345","\u1F29\u0399","\u1F29\u03B9","\u1F29\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH PSILI AND VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F22\u03B9","\u1F22\u0345","\u1F22\u0399","\u1F22\u03B9","\u1F22\u1FBE","\u1F2A\u0345","\u1F2A\u0399","\u1F2A\u03B9","\u1F2A\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH DASIA AND VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F23\u03B9","\u1F23\u0345","\u1F23\u0399","\u1F23\u03B9","\u1F23\u1FBE","\u1F2B\u0345","\u1F2B\u0399","\u1F2B\u03B9","\u1F2B\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH PSILI AND OXIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F24\u03B9","\u1F24\u0345","\u1F24\u0399","\u1F24\u03B9","\u1F24\u1FBE","\u1F2C\u0345","\u1F2C\u0399","\u1F2C\u03B9","\u1F2C\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH DASIA AND OXIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F25\u03B9","\u1F25\u0345","\u1F25\u0399","\u1F25\u03B9","\u1F25\u1FBE","\u1F2D\u0345","\u1F2D\u0399","\u1F2D\u03B9","\u1F2D\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH PSILI AND PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u1F26\u03B9","\u1F26\u0345","\u1F26\u0399","\u1F26\u03B9","\u1F26\u1FBE","\u1F2E\u0345","\u1F2E\u0399","\u1F2E\u03B9","\u1F2E\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH DASIA AND PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u1F27\u03B9","\u1F27\u0345","\u1F27\u0399","\u1F27\u03B9","\u1F27\u1FBE","\u1F2F\u0345","\u1F2F\u0399","\u1F2F\u03B9","\u1F2F\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH PSILI}\N{GREEK SMALL LETTER IOTA}
{"\u1F60\u03B9","\u1F60\u0345","\u1F60\u0399","\u1F60\u03B9","\u1F60\u1FBE","\u1F68\u0345","\u1F68\u0399","\u1F68\u03B9","\u1F68\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH DASIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F61\u03B9","\u1F61\u0345","\u1F61\u0399","\u1F61\u03B9","\u1F61\u1FBE","\u1F69\u0345","\u1F69\u0399","\u1F69\u03B9","\u1F69\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH PSILI AND VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F62\u03B9","\u1F62\u0345","\u1F62\u0399","\u1F62\u03B9","\u1F62\u1FBE","\u1F6A\u0345","\u1F6A\u0399","\u1F6A\u03B9","\u1F6A\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH DASIA AND VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F63\u03B9","\u1F63\u0345","\u1F63\u0399","\u1F63\u03B9","\u1F63\u1FBE","\u1F6B\u0345","\u1F6B\u0399","\u1F6B\u03B9","\u1F6B\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH PSILI AND OXIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F64\u03B9","\u1F64\u0345","\u1F64\u0399","\u1F64\u03B9","\u1F64\u1FBE","\u1F6C\u0345","\u1F6C\u0399","\u1F6C\u03B9","\u1F6C\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH DASIA AND OXIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F65\u03B9","\u1F65\u0345","\u1F65\u0399","\u1F65\u03B9","\u1F65\u1FBE","\u1F6D\u0345","\u1F6D\u0399","\u1F6D\u03B9","\u1F6D\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH PSILI AND PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u1F66\u03B9","\u1F66\u0345","\u1F66\u0399","\u1F66\u03B9","\u1F66\u1FBE","\u1F6E\u0345","\u1F6E\u0399","\u1F6E\u03B9","\u1F6E\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH DASIA AND PERISPOMENI}\N{GREEK SMALL LETTER IOTA}
{"\u1F67\u03B9","\u1F67\u0345","\u1F67\u0399","\u1F67\u03B9","\u1F67\u1FBE","\u1F6F\u0345","\u1F6F\u0399","\u1F6F\u03B9","\u1F6F\u1FBE",},
// \N{GREEK SMALL LETTER ALPHA WITH VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F70\u03B9","\u1F70\u0345","\u1F70\u0399","\u1F70\u03B9","\u1F70\u1FBE","\u1FBA\u0345","\u1FBA\u0399","\u1FBA\u03B9","\u1FBA\u1FBE",},
// \N{GREEK SMALL LETTER ETA WITH VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F74\u03B9","\u1F74\u0345","\u1F74\u0399","\u1F74\u03B9","\u1F74\u1FBE","\u1FCA\u0345","\u1FCA\u0399","\u1FCA\u03B9","\u1FCA\u1FBE",},
// \N{GREEK SMALL LETTER OMEGA WITH VARIA}\N{GREEK SMALL LETTER IOTA}
{"\u1F7C\u03B9","\u1F7C\u0345","\u1F7C\u0399","\u1F7C\u03B9","\u1F7C\u1FBE","\u1FFA\u0345","\u1FFA\u0399","\u1FFA\u03B9","\u1FFA\u1FBE",},
};
// this initializes the data used to generated the case-equivalents
static {
// Gather up the exceptions in a form we can use
if (!GENERATE) {
for (int i = 0; i < exceptionList.length; ++i) {
String[] exception = exceptionList[i];
Set s = new HashSet();
// there has to be some method to do the following, but I can't find it in the collections
for (int j = 0; j < exception.length; ++j) {
s.add(exception[j]);
}
fromCaseFold.put(exception[0], s);
}
}
// walk through all the characters, and at every case fold result,
// put a set of all the characters that map to that result
boolean defaultmapping = true; // false for turkish
for (int i = 0; i <= 0x10FFFF; ++i) {
int cat = UCharacter.getType(i);
if (cat == Character.UNASSIGNED || cat == Character.PRIVATE_USE) continue;
String cp = UTF16.valueOf(i);
String mapped = UCharacter.foldCase(cp, defaultmapping);
if (mapped.equals(cp)) continue;
if (maxLength < mapped.length()) maxLength = mapped.length();
// at this point, have different case folding
Set s = (Set) fromCaseFold.get(mapped);
if (s == null) {
s = new HashSet();
s.add(mapped); // add the case fold result itself
fromCaseFold.put(mapped, s);
}
s.add(cp);
toCaseFold.put(cp, mapped);
toCaseFold.put(mapped, mapped); // add mapping to self
}
// Emit the final data
if (DUMP) {
System.out.println("maxLength = " + maxLength);
System.out.println("\nfromCaseFold:");
Iterator it = fromCaseFold.keySet().iterator();
while (it.hasNext()) {
Object key = it.next();
System.out.print(" " + toHex2.transliterate((String)key) + ": ");
Set s = (Set) fromCaseFold.get(key);
Iterator it2 = s.iterator();
boolean first = true;
while (it2.hasNext()) {
if (first) {
first = false;
} else {
System.out.print(", ");
}
System.out.print(toHex2.transliterate((String)it2.next()));
}
System.out.println("");
}
System.out.println("\ntoCaseFold:");
it = toCaseFold.keySet().iterator();
while (it.hasNext()) {
String key = (String) it.next();
String value = (String) toCaseFold.get(key);
System.out.println(" " + toHex2.transliterate(key) + ": " + toHex2.transliterate(value));
}
}
// Now convert all those sets into linear arrays
// We can't do this in place in Java, so make a temporary target array
// Note: This could be transformed into a single array, with offsets into it.
// Might be best choice in C.
Map fromCaseFold2 = new HashMap();
Iterator it = fromCaseFold.keySet().iterator();
while (it.hasNext()) {
Object key = it.next();
Set s = (Set) fromCaseFold.get(key);
String[] temp = new String[s.size()];
s.toArray(temp);
fromCaseFold2.put(key, temp);
}
fromCaseFold = fromCaseFold2;
// We have processed everything, so the iterator will now work
// The following is normally OFF.
// It is here to generate (under the GENERATE flag) the static exception list.
// It must be at the very end of initialization, so that the iterator is functional.
// (easiest to do it that way)
if (GENERATE) {
// first get small set of items that have multiple characters
Set multichars = new TreeSet();
it = fromCaseFold.keySet().iterator();
while (it.hasNext()) {
String key = (String) it.next();
if (UTF16.countCodePoint(key) < 2) continue;
multichars.add(key);
}
// now we will go through each of them.
CaseIterator ci = new CaseIterator();
it = multichars.iterator();
while (it.hasNext()) {
String key = (String) it.next();
// here is a nasty complication. Take 'ffi' ligature. We
// can't just close it, since we would miss the combination
// that includes the 'fi' => "fi" ligature
// so first do a pass through, and add substring combinations
// we call this a 'partial closure'
Set partialClosure = new TreeSet();
partialClosure.add(key);
if (UTF16.countCodePoint(key) > 2) {
Iterator multiIt2 = multichars.iterator();
while (multiIt2.hasNext()) {
String otherKey = (String) multiIt2.next();
if (otherKey.length() >= key.length()) continue;
int pos = -1;
while (true) {
// The following is not completely general
// but works for the actual cased stuff,
// and should work for future characters, since we won't have
// more ligatures & other oddities.
pos = key.indexOf(otherKey, pos+1);
if (pos < 0) break;
int endPos = pos + otherKey.length();
// we know we have a proper substring,
// so get the combinations
String[] choices = (String[]) fromCaseFold.get(otherKey);
for (int ii = 0; ii < choices.length; ++ii) {
String patchwork = key.substring(0, pos)
+ choices[ii]
+ key.substring(endPos);
partialClosure.add(patchwork);
}
}
}
}
// now, for each thing in the partial closure, get its
// case closure and add it to the final result.
Set closure = new TreeSet(); // this will be the real closure
Iterator partialIt = partialClosure.iterator();
while (partialIt.hasNext()) {
String key2 = (String) partialIt.next();
ci.reset(key2);
for (String temp = ci.next(); temp != null; temp = ci.next()) {
closure.add(temp);
}
// form closure
/*String[] choices = (String[]) fromCaseFold.get(key2);
for (int i = 0; i < choices.length; ++i) {
ci.reset(choices[i]);
String temp;
while (null != (temp = ci.next())) {
closure.add(temp);
}
}
*/
}
// print it out, so that it can be cut and pasted back into this document.
Iterator it2 = closure.iterator();
System.out.println("\t// " + toName.transliterate(key));
System.out.print("\t{\"" + toHex.transliterate(key) + "\",");
while (it2.hasNext()) {
String item = (String)it2.next();
System.out.print("\"" + toHex.transliterate(item) + "\",");
}
System.out.println("},");
}
}
}
// ============ PRIVATE CLASS DATA ============
// pieces that we will put together
// is not changed during iteration
private int count = 0;
private String[][] variants;
// state information, changes during iteration
private boolean done = false;
private int[] counts;
// internal buffer for efficiency
private StringBuffer nextBuffer = new StringBuffer();
// ========================
/**
* Reset to different source. Once reset, the iteration starts from the beginning.
* @param source The string to get case variants for
*/
public void reset(String source) {
// allocate arrays to store pieces
// using length might be slightly too long, but we don't care much
counts = new int[source.length()];
variants = new String[source.length()][];
// walk through the source, and break up into pieces
// each piece becomes an array of equivalent values
// TODO: could optimized this later to coalesce all single string pieces
String piece = null;
count = 0;
for (int i = 0; i < source.length(); i += piece.length()) {
// find *longest* matching piece
String caseFold = null;
if (GENERATE) {
// do exactly one CP
piece = UTF16.valueOf(source, i);
caseFold = (String) toCaseFold.get(piece);
} else {
int max = i + maxLength;
if (max > source.length()) max = source.length();
for (int j = max; j > i; --j) {
piece = source.substring(i, j);
caseFold = (String) toCaseFold.get(piece);
if (caseFold != null) break;
}
}
// if we fail, pick one code point
if (caseFold == null) {
piece = UTF16.valueOf(source, i);
variants[count++] = new String[] {piece}; // single item string
} else {
variants[count++] = (String[])fromCaseFold.get(caseFold);
}
}
reset();
}
/**
* Restart the iteration from the beginning, but with same source
*/
public void reset() {
done = false;
for (int i = 0; i < count; ++i) {
counts[i] = 0;
}
}
/**
* Iterates through the case variants.
* @return next case variant. Each variant will case-fold to the same value as the source will.
* When the iteration is done, null is returned.
*/
public String next() {
if (done) return null;
int i;
// TODO Optimize so we keep the piece before and after the current position
// so we don't have so much concatenation
// get the result, a concatenation
nextBuffer.setLength(0);
for (i = 0; i < count; ++i) {
nextBuffer.append(variants[i][counts[i]]);
}
// find the next right set of pieces to concatenate
for (i = count-1; i >= 0; --i) {
counts[i]++;
if (counts[i] < variants[i].length) break;
counts[i] = 0;
}
// if we go too far, bail
if (i < 0) {
done = true;
}
return nextBuffer.toString();
}
/**
* Temporary test, just to see how the stuff works.
*/
static public void main(String[] args) {
String[] testCases = {"fiss", "h\u03a3"};
CaseIterator ci = new CaseIterator();
for (int i = 0; i < testCases.length; ++i) {
String item = testCases[i];
System.out.println();
System.out.println("Testing: " + toName.transliterate(item));
System.out.println();
ci.reset(item);
int count = 0;
for (String temp = ci.next(); temp != null; temp = ci.next()) {
System.out.println(toName.transliterate(temp));
count++;
}
System.out.println("Total: " + count);
}
// generate a list of all caseless characters -- characters whose
// case closure is themselves.
UnicodeSet caseless = new UnicodeSet();
for (int i = 0; i <= 0x10FFFF; ++i) {
String cp = UTF16.valueOf(i);
ci.reset(cp);
int count = 0;
String fold = null;
for (String temp = ci.next(); temp != null; temp = ci.next()) {
fold = temp;
if (++count > 1) break;
}
if (count==1 && fold.equals(cp)) {
caseless.add(i);
}
}
System.out.println("caseless = " + caseless.toPattern(true));
UnicodeSet not_lc = new UnicodeSet("[:^lc:]");
UnicodeSet a = new UnicodeSet();
a.set(not_lc);
a.removeAll(caseless);
System.out.println("[:^lc:] - caseless = " + a.toPattern(true));
a.set(caseless);
a.removeAll(not_lc);
System.out.println("caseless - [:^lc:] = " + a.toPattern(true));
}
}