protected HanziToPinyin(boolean hasChinaCollator) {
mHasChinaCollator = hasChinaCollator;
}

public static HanziToPinyin getInstance() {
synchronized (HanziToPinyin.class) {
if (sInstance != null) {
return sInstance;
}
// Check if zh_CN collation data is available
final Locale locale[] = Collator.getAvailableLocales();
for (int i = 0; i < locale.length; i++) {
if (locale[i].equals(Locale.CHINA)) {
// Do self validation just once.
if (DEBUG) {
Log.d(TAG, "Self validation. Result: " + doSelfValidation());
}
sInstance = new HanziToPinyin(true);
return sInstance;
}
}
Log.w(TAG, "There is no Chinese collator, HanziToPinyin is disabled");
sInstance = new HanziToPinyin(false);
return sInstance;
}
}

/**
* Validate if our internal table has some wrong value.
*
* @return true when the table looks correct.
*/
private static boolean doSelfValidation() {
char lastChar = UNIHANS[0];
String lastString = Character.toString(lastChar);
for (char c : UNIHANS) {
if (lastChar == c) {
continue;
}
final String curString = Character.toString(c);
int cmp = COLLATOR.compare(lastString, curString);
if (cmp >= 0) {
Log.e(TAG, "Internal error in Unihan table. " + "The last string \"" + lastString
+ "\" is greater than current string \"" + curString + "\".");
return false;
}
lastString = curString;
}
return true;
}

private Token getToken(char character) {
Token token = new Token();
final String letter = Character.toString(character);
token.source = letter;
int offset = -1;
int cmp;
if (character < 256) {
token.type = Token.LATIN;
token.target = letter;
return token;
} else if (character < FIRST_UNIHAN) {
token.type = Token.UNKNOWN;
token.target = letter;
return token;
} else {
cmp = COLLATOR.compare(letter, FIRST_PINYIN_UNIHAN);
if (cmp < 0) {
token.type = Token.UNKNOWN;
token.target = letter;
return token;
} else if (cmp == 0) {
token.type = Token.PINYIN;
offset = 0;
} else {
cmp = COLLATOR.compare(letter, LAST_PINYIN_UNIHAN);
if (cmp > 0) {
token.type = Token.UNKNOWN;
token.target = letter;
return token;
} else if (cmp == 0) {
token.type = Token.PINYIN;
offset = UNIHANS.length - 1;
}
}
}