```
    static CertificateFactory getCertificateFactory(final String type, final Provider provider)
        throws CertificateException {
        final CertificateFactorySpi spi = (CertificateFactorySpi) getImplEngine("CertificateFactory", type);
        if ( spi == null ) throw new CertificateException(type + " not found");
        return CertificateFactory.getInstance(type, provider);
    }
```