PrivateKey privateKey = (PrivateKey) ks.getKey( alias, keystorePass.toCharArray() );

        X509Certificate cert = (X509Certificate) ks.getCertificate( alias );
        List<X509Certificate> chain = Arrays.asList( cert );
        //new sign
        CAdESSignature cadesSignature = new CAdESSignature( true );

        //add certs in sign
        Collection<X509CertificateHolder> holderList = new ArrayList<X509CertificateHolder>();
        for (X509Certificate cert1 : chain)
        {
            holderList.add(new X509CertificateHolder(cert1.getEncoded()));
        }
        cadesSignature.setCertificateStore(new CollectionStore(holderList));