[Solved]-Scala compilation issue when using Java library with interface using generic type-scala

Here is what I modified:

def verify(data: File): Boolean = {
  val signedData = new CMSSignedData(new CMSProcessableFile(data), Base64.decode(this.value))
  val certStore = signedData.getCertificates.asInstanceOf[Store[X509CertificateHolder]]
  val signers = signedData.getSignerInfos.getSigners
  val signer = signers.iterator.next
  val certs = certStore.getMatches(signer.getSID.asInstanceOf[Selector[X509CertificateHolder]])
  val cert = certs.iterator.next
  signer.verify(new JcaSimpleSignerInfoVerifierBuilder().setProvider("BC").build(cert))
}

Now, the code compile without problem!

Thanks a lot.

Kind Regards,

If you look at https://www.bouncycastle.org/docs/pkixdocs1.5on/org/bouncycastle/cms/CMSSignedData.html, getCertificates returns a raw Store object instead of Store<Something>. Scala doesn't support working with raw types, generally speaking (they only exist in Java to interoperate with pre-Java-5 code). It's documented as

Return any X.509 certificate objects in this SignedData structure as a Store of X509CertificateHolder objects.

So you can try

val certStore = signedData.getCertificates.asInstanceOf[Store[X509CertificateHolder]]

and you'll also need casts in any other places where raw Store or Selector are returned.