AlphabeticIndex::AlphabeticIndex(const Locale &locale, UErrorCode &status) {
init(status);
if (U_FAILURE(status)) {
return;
}
locale_ = locale;
langType_ = langTypeFromLocale(locale_);
collator_ = Collator::createInstance(locale, status);
if (collator_ != NULL) {
collatorPrimaryOnly_ = collator_->clone();
}
if (collatorPrimaryOnly_ != NULL) {
collatorPrimaryOnly_->setStrength(Collator::PRIMARY);
}
getIndexExemplars(*initialLabels_, locale, status);
indexBuildRequired_ = TRUE;
if ((collator_ == NULL || collatorPrimaryOnly_ == NULL) && U_SUCCESS(status)) {
status = U_MEMORY_ALLOCATION_ERROR;
}
firstScriptCharacters_ = firstStringsInScript(status);
}
void AlphabeticIndex::init(const Locale *locale, UErrorCode &status) {
if (U_FAILURE(status)) { return; }
if (locale == NULL && collator_ == NULL) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
initialLabels_ = new UnicodeSet();
if (initialLabels_ == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
inflowLabel_.setTo((UChar)0x2026); // Ellipsis
overflowLabel_ = inflowLabel_;
underflowLabel_ = inflowLabel_;
if (collator_ == NULL) {
Collator *coll = Collator::createInstance(*locale, status);
if (U_FAILURE(status)) {
delete coll;
return;
}
if (coll == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
collator_ = dynamic_cast<RuleBasedCollator *>(coll);
if (collator_ == NULL) {
delete coll;
status = U_UNSUPPORTED_ERROR;
return;
}
}
collatorPrimaryOnly_ = static_cast<RuleBasedCollator *>(collator_->clone());
if (collatorPrimaryOnly_ == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
collatorPrimaryOnly_->setAttribute(UCOL_STRENGTH, UCOL_PRIMARY, status);
firstCharsInScripts_ = firstStringsInScript(status);
if (U_FAILURE(status)) { return; }
firstCharsInScripts_->sortWithUComparator(collatorComparator, collatorPrimaryOnly_, status);
// Guard against a degenerate collator where
// some script boundary strings are primary ignorable.
for (;;) {
if (U_FAILURE(status)) { return; }
if (firstCharsInScripts_->isEmpty()) {
// AlphabeticIndex requires some non-ignorable script boundary strings.
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
if (collatorPrimaryOnly_->compare(
*static_cast<UnicodeString *>(firstCharsInScripts_->elementAt(0)),
emptyString_, status) == UCOL_EQUAL) {
firstCharsInScripts_->removeElementAt(0);
} else {
break;
}
}
// Chinese index characters, which are specific to each of the several Chinese tailorings,
// take precedence over the single locale data exemplar set per language.
if (!addChineseIndexCharacters(status) && locale != NULL) {
addIndexExemplars(*locale, status);
}
}
void AlphabeticIndex::init(const Locale *locale, UErrorCode &status) {
if (U_FAILURE(status)) { return; }
if (locale == NULL && collator_ == NULL) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
initialLabels_ = new UnicodeSet();
if (initialLabels_ == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
inflowLabel_.setTo((UChar)0x2026); // Ellipsis
overflowLabel_ = inflowLabel_;
underflowLabel_ = inflowLabel_;
if (collator_ == NULL) {
collator_ = static_cast<RuleBasedCollator *>(Collator::createInstance(*locale, status));
if (U_FAILURE(status)) { return; }
if (collator_ == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
}
collatorPrimaryOnly_ = static_cast<RuleBasedCollator *>(collator_->clone());
if (collatorPrimaryOnly_ == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
collatorPrimaryOnly_->setAttribute(UCOL_STRENGTH, UCOL_PRIMARY, status);
firstCharsInScripts_ = firstStringsInScript(status);
if (U_FAILURE(status)) { return; }
firstCharsInScripts_->sortWithUComparator(collatorComparator, collatorPrimaryOnly_, status);
UnicodeString _4E00((UChar)0x4E00);
UnicodeString _1100((UChar)0x1100);
UnicodeString _1112((UChar)0x1112);
if (collatorPrimaryOnly_->compare(_4E00, _1112, status) <= 0 &&
collatorPrimaryOnly_->compare(_1100, _4E00, status) <= 0) {
// The standard Korean tailoring sorts Hanja (Han characters)
// as secondary differences from Hangul syllables.
// This makes U+4E00 not useful as a Han-script boundary.
// TODO: This becomes obsolete when the root collator gets
// reliable script-first-primary mappings.
int32_t hanIndex = binarySearch(
*firstCharsInScripts_, _4E00, *collatorPrimaryOnly_);
if (hanIndex >= 0) {
firstCharsInScripts_->removeElementAt(hanIndex);
}
}
// Guard against a degenerate collator where
// some script boundary strings are primary ignorable.
for (;;) {
if (U_FAILURE(status)) { return; }
if (firstCharsInScripts_->isEmpty()) {
// AlphabeticIndex requires some non-ignorable script boundary strings.
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
if (collatorPrimaryOnly_->compare(
*static_cast<UnicodeString *>(firstCharsInScripts_->elementAt(0)),
emptyString_, status) == UCOL_EQUAL) {
firstCharsInScripts_->removeElementAt(0);
} else {
break;
}
}
if (locale != NULL) {
addIndexExemplars(*locale, status);
}
}