Method createCompoundCRSFromExisting

src/iso19111/factory.cpp:10314–10364

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std::list<crs::CompoundCRSNNPtr>
AuthorityFactory::createCompoundCRSFromExisting(
    const crs::CompoundCRSNNPtr &crs) const {
    std::list<crs::CompoundCRSNNPtr> res;

    auto lockedThisFactory(d->getSharedFromThis());
    assert(lockedThisFactory);

    const auto &components = crs->componentReferenceSystems();
    if (components.size() != 2) {
        return res;
    }
    auto candidatesHorizCRS = components[0]->identify(lockedThisFactory);
    auto candidatesVertCRS = components[1]->identify(lockedThisFactory);
    if (candidatesHorizCRS.empty() && candidatesVertCRS.empty()) {
        return res;
    }

    std::string sql("SELECT auth_name, code FROM compound_crs WHERE "
                    "deprecated = 0 AND ");
    ListOfParams params;
    bool addAnd = false;
    if (!candidatesHorizCRS.empty()) {
        sql += buildSqlLookForAuthNameCode(candidatesHorizCRS, params,
                                           "horiz_crs_");
        addAnd = true;
    }
    if (!candidatesVertCRS.empty()) {
        if (addAnd) {
            sql += " AND ";
        }
        sql += buildSqlLookForAuthNameCode(candidatesVertCRS, params,
                                           "vertical_crs_");
        addAnd = true;
    }
    if (d->hasAuthorityRestriction()) {
        if (addAnd) {
            sql += " AND ";
        }
        sql += "auth_name = ?";
        params.emplace_back(d->authority());
    }

    auto sqlRes = d->run(sql, params);
    for (const auto &row : sqlRes) {
        const auto &auth_name = row[0];
        const auto &code = row[1];
        res.emplace_back(d->createFactory(auth_name)->createCompoundCRS(code));
    }
    return res;
}

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