Java Security

Hello.

I have a RSAPublicKey's exponent and modulus stored into a database as strings. I collect them and then i'm reconstructing the public key.

                 
RawRSAKey rawKey = RawRSAKey.getInstance(rs.getString(1),rs.getString(2));
RSAPublicKeySpec publicSpec = new RSAPublicKeySpec(rawKey.getModulus(), rawKey.getExponent());

KeyFactory keyFactory = null;
      try {
    keyFactory = KeyFactory.getInstance("RSA");
    PublicKey PubKeyT = keyFactory.generatePublic(publicSpec);

As you can see, i now have my public key in the PubKeyT variable.

Then i have to take modulus and exponent again from the publickey i just reconstructed.

But:

BigInteger e = publicKeyT.getPublicExponent();

is not working because (i think) publicKeyT is a PublicKey and not a RSAPublicKey. Is there a way to convert PublicKey to RSAPublicKey or reconstruct my key directly to an RSAPublicKey.

Thank you in advantage.