private static String sha1hash(Collection<String> nquads) {
        try {
            // create SHA-1 digest
            final MessageDigest md = MessageDigest.getInstance("SHA-1");
            for (final String nquad : nquads) {
                md.update(nquad.getBytes("UTF-8"));
            }
            return encodeHex(md.digest());
        } catch (final NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        } catch (final UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }
private static String sha1hash ( Collection < String > nquads ) { try { final MessageDigest md = MessageDigest . getInstance ( "SHA-1" ) ; for ( final String nquad : nquads ) { md . update ( nquad . getBytes ( "UTF-8" ) ) ; } return encodeHex ( md . digest ( ) ) ; } catch ( final NoSuchAlgorithmException e ) { throw new RuntimeException ( e ) ; } catch ( final UnsupportedEncodingException e ) { throw new RuntimeException ( e ) ; } }
A helper class to sha1 hash all the strings in a collection

@param nquads
@return