private static UnicodeSet getRepresentativeBoundaryHangul() {
UnicodeSet resultToAddTo = new UnicodeSet();
// U+1100 ( ᄀ ) HANGUL CHOSEONG KIYEOK
// U+1161 ( ᅡ ) HANGUL JUNGSEONG A
UnicodeSet L = new UnicodeSet("[:hst=L:]");
UnicodeSet V = new UnicodeSet("[:hst=V:]");
UnicodeSet T = new UnicodeSet("[:hst=T:]");
String prefixLV = "\u1100\u1161";
String prefixL = "\u1100";
String suffixV = "\u1161";
String nullL = "\u110B";
UnicodeSet L0 = new UnicodeSet("[\u1100\u110B]");
// do all combinations of L0 + V + nullL + V
for (UnicodeSetIterator iL0 = new UnicodeSetIterator(L0); iL0.next(); ) {
for (UnicodeSetIterator iV = new UnicodeSetIterator(V); iV.next(); ) {
for (UnicodeSetIterator iV2 = new UnicodeSetIterator(V); iV2.next(); ) {
String sample = iL0.getString() + iV.getString() + nullL + iV2.getString();
String trial = Normalizer.compose(sample, false);
if (trial.length() == 2) {
resultToAddTo.add(trial);
}
}
}
}
for (UnicodeSetIterator iL = new UnicodeSetIterator(L); iL.next(); ) {
// do all combinations of "g" + V + L + "a"
final String suffix = iL.getString() + suffixV;
for (UnicodeSetIterator iV = new UnicodeSetIterator(V); iV.next(); ) {
String sample = prefixL + iV.getString() + suffix;
String trial = Normalizer.compose(sample, false);
if (trial.length() == 2) {
resultToAddTo.add(trial);
}
}
// do all combinations of "ga" + T + L + "a"
for (UnicodeSetIterator iT = new UnicodeSetIterator(T); iT.next(); ) {
String sample = prefixLV + iT.getString() + suffix;
String trial = Normalizer.compose(sample, false);
if (trial.length() == 2) {
resultToAddTo.add(trial);
}
}
}
return resultToAddTo;
}
private static void addRepresentativeHangul(
UnicodeSet resultToAddTo, int leng, boolean noFirstConsonant) {
UnicodeSet notYetSeen = new UnicodeSet();
for (char c = '\uAC00'; c < '\uD7AF'; ++c) {
String charStr = String.valueOf(c);
String decomp = Normalizer.decompose(charStr, false);
if (decomp.length() != leng) {
continue; // only take one length at a time
}
if (decomp.startsWith("ᄋ") != noFirstConsonant) {
continue;
}
if (!notYetSeen.containsAll(decomp)) {
resultToAddTo.add(c);
notYetSeen.addAll(decomp);
}
}
}