RuleBasedCollator::RuleBasedCollator(const Locale& desiredLocale,
UErrorCode& status)
: dataIsOwned(FALSE), isWriteThroughAlias(FALSE), ucollator(NULL)
{
if (U_FAILURE(status))
return;
/*
Try to load, in order:
1. The desired locale's collation.
2. A fallback of the desired locale.
3. The default locale's collation.
4. A fallback of the default locale.
5. The default collation rules, which contains en_US collation rules.
To reiterate, we try:
Specific:
language+country+variant
language+country
language
Default:
language+country+variant
language+country
language
Root: (aka DEFAULTRULES)
steps 1-5 are handled by resource bundle fallback mechanism.
however, in a very unprobable situation that no resource bundle
data exists, step 5 is repeated with hardcoded default rules.
*/
setUCollator(desiredLocale, status);
if (U_FAILURE(status))
{
status = U_ZERO_ERROR;
setUCollator(kRootLocaleName, status);
if (status == U_ZERO_ERROR) {
status = U_USING_DEFAULT_WARNING;
}
}
if (U_SUCCESS(status))
{
setRuleStringFromCollator();
}
}
RuleBasedCollator::RuleBasedCollator(const Locale& desiredLocale,
UErrorCode& status) :
dataIsOwned(FALSE), ucollator(0), urulestring(0)
{
if (U_FAILURE(status))
return;
/*
Try to load, in order:
1. The desired locale's collation.
2. A fallback of the desired locale.
3. The default locale's collation.
4. A fallback of the default locale.
5. The default collation rules, which contains en_US collation rules.
To reiterate, we try:
Specific:
language+country+variant
language+country
language
Default:
language+country+variant
language+country
language
Root: (aka DEFAULTRULES)
steps 1-5 are handled by resource bundle fallback mechanism.
however, in a very unprobable situation that no resource bundle
data exists, step 5 is repeated with hardcoded default rules.
*/
setUCollator(desiredLocale, status);
if (U_FAILURE(status))
{
status = U_ZERO_ERROR;
setUCollator(kRootLocaleName, status);
if (status == U_ZERO_ERROR) {
status = U_USING_DEFAULT_WARNING;
}
}
if (U_SUCCESS(status))
{
int32_t length;
const UChar *r = ucol_getRules(ucollator, &length);
if (length > 0) {
// alias the rules string
urulestring = new UnicodeString(TRUE, r, length);
}
else {
urulestring = new UnicodeString();
}
/* test for NULL */
if (urulestring == 0) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
dataIsOwned = TRUE;
isWriteThroughAlias = FALSE;
}
return;
}
