C++ Transliterator::setID方法代码示例

Transliterator* U_EXPORT2
Transliterator::createInstance(const UnicodeString& ID,
                                UTransDirection dir,
                                UParseError& parseError,
                                UErrorCode& status)
{
    if (U_FAILURE(status)) {
        return 0;
    }

    UnicodeString canonID;
    UVector list(status);
    if (U_FAILURE(status)) {
        return NULL;
    }

    UnicodeSet* globalFilter;
    // TODO add code for parseError...currently unused, but
    // later may be used by parsing code...
    if (!TransliteratorIDParser::parseCompoundID(ID, dir, canonID, list, globalFilter)) {
        status = U_INVALID_ID;
        return NULL;
    }
    
    TransliteratorIDParser::instantiateList(list, status);
    if (U_FAILURE(status)) {
        return NULL;
    }
    
    U_ASSERT(list.size() > 0);
    Transliterator* t = NULL;
    
    if (list.size() > 1 || canonID.indexOf(ID_DELIM) >= 0) {
        // [NOTE: If it's a compoundID, we instantiate a CompoundTransliterator even if it only
        // has one child transliterator.  This is so that toRules() will return the right thing
        // (without any inactive ID), but our main ID still comes out correct.  That is, if we
        // instantiate "(Lower);Latin-Greek;", we want the rules to come out as "::Latin-Greek;"
        // even though the ID is "(Lower);Latin-Greek;".
        t = new CompoundTransliterator(list, parseError, status);
    }
    else {
        t = (Transliterator*)list.elementAt(0);
    }
    // Check null pointer
    if (t != NULL) {
        t->setID(canonID);
        if (globalFilter != NULL) {
            t->adoptFilter(globalFilter);
        }
    }
    else if (U_SUCCESS(status)) {
        status = U_MEMORY_ALLOCATION_ERROR;
    }
    return t;
}

Transliterator* U_EXPORT2
Transliterator::createFromRules(const UnicodeString& ID,
                                const UnicodeString& rules,
                                UTransDirection dir,
                                UParseError& parseError,
                                UErrorCode& status)
{
    Transliterator* t = NULL;

    TransliteratorParser parser(status);
    parser.parse(rules, dir, parseError, status);

    if (U_FAILURE(status)) {
        return 0;
    }

    // NOTE: The logic here matches that in TransliteratorRegistry.
    if (parser.idBlockVector.size() == 0 && parser.dataVector.size() == 0) {
        t = new NullTransliterator();
    }
    else if (parser.idBlockVector.size() == 0 && parser.dataVector.size() == 1) {
        t = new RuleBasedTransliterator(ID, (TransliterationRuleData*)parser.dataVector.orphanElementAt(0), TRUE);
    }
    else if (parser.idBlockVector.size() == 1 && parser.dataVector.size() == 0) {
        // idBlock, no data -- this is an alias.  The ID has
        // been munged from reverse into forward mode, if
        // necessary, so instantiate the ID in the forward
        // direction.
        if (parser.compoundFilter != NULL) {
            UnicodeString filterPattern;
            parser.compoundFilter->toPattern(filterPattern, FALSE);
            t = createInstance(filterPattern + UnicodeString(ID_DELIM)
                    + *((UnicodeString*)parser.idBlockVector.elementAt(0)), UTRANS_FORWARD, parseError, status);
        }
        else
            t = createInstance(*((UnicodeString*)parser.idBlockVector.elementAt(0)), UTRANS_FORWARD, parseError, status);


        if (t != NULL) {
            t->setID(ID);
        }
    }
    else {
        UVector transliterators(status);
        int32_t passNumber = 1;

        int32_t limit = parser.idBlockVector.size();
        if (parser.dataVector.size() > limit)
            limit = parser.dataVector.size();

        for (int32_t i = 0; i < limit; i++) {
            if (i < parser.idBlockVector.size()) {
                UnicodeString* idBlock = (UnicodeString*)parser.idBlockVector.elementAt(i);
                if (!idBlock->isEmpty()) {
                    Transliterator* temp = createInstance(*idBlock, UTRANS_FORWARD, parseError, status);
                    if (temp != NULL && temp->getDynamicClassID() != NullTransliterator::getStaticClassID())
                        transliterators.addElement(temp, status);
                    else
                        delete temp;
                }
            }
            if (!parser.dataVector.isEmpty()) {
                TransliterationRuleData* data = (TransliterationRuleData*)parser.dataVector.orphanElementAt(0);
                RuleBasedTransliterator* temprbt = new RuleBasedTransliterator(UnicodeString(CompoundTransliterator::PASS_STRING) + (passNumber++),
                        data, TRUE);
                // Check if NULL before adding it to transliterators to avoid future usage of NULL pointer.
                if (temprbt == NULL) {
                	status = U_MEMORY_ALLOCATION_ERROR;
                	return t;
                }
                transliterators.addElement(temprbt, status);
            }
        }

        t = new CompoundTransliterator(transliterators, passNumber - 1, parseError, status);
        // Null pointer check
        if (t != NULL) {
            t->setID(ID);
            t->adoptFilter(parser.orphanCompoundFilter());
        }
    }
    if (U_SUCCESS(status) && t == NULL) {
        status = U_MEMORY_ALLOCATION_ERROR;
    }
    return t;
}

Transliterator* Transliterator::createBasicInstance(const UnicodeString& id,
                                                    const UnicodeString* canon) {
    UParseError pe;
    UErrorCode ec = U_ZERO_ERROR;
    TransliteratorAlias* alias = 0;
    Transliterator* t = 0;

    umtx_lock(&registryMutex);
    if (HAVE_REGISTRY(ec)) {
        t = registry->get(id, alias, ec);
    }
    umtx_unlock(&registryMutex);

    if (U_FAILURE(ec)) {
        delete t;
        delete alias;
        return 0;
    }

    // We may have not gotten a transliterator:  Because we can't
    // instantiate a transliterator from inside TransliteratorRegistry::
    // get() (that would deadlock), we sometimes pass back an alias.  This
    // contains the data we need to finish the instantiation outside the
    // registry mutex.  The alias may, in turn, generate another alias, so
    // we handle aliases in a loop.  The max times through the loop is two.
    // [alan]
    while (alias != 0) {
        U_ASSERT(t==0);
        // Rule-based aliases are handled with TransliteratorAlias::
        // parse(), followed by TransliteratorRegistry::reget().
        // Other aliases are handled with TransliteratorAlias::create().
        if (alias->isRuleBased()) {
            // Step 1. parse
            TransliteratorParser parser(ec);
            alias->parse(parser, pe, ec);
            delete alias;
            alias = 0;

            // Step 2. reget
            umtx_lock(&registryMutex);
            if (HAVE_REGISTRY(ec)) {
                t = registry->reget(id, parser, alias, ec);
            }
            umtx_unlock(&registryMutex);

            // Step 3. Loop back around!
        } else {
            t = alias->create(pe, ec);
            delete alias;
            alias = 0;
            break;
        }
        if (U_FAILURE(ec)) {
            delete t;
            delete alias;
            t = NULL;
            break;
        }
    }

    if (t != NULL && canon != NULL) {
        t->setID(*canon);
    }

    return t;
}