private Optional<List<Snak>> processGDMQualifiedAttributes(final Statement statement) {
final List<Snak> snakList = new ArrayList<>();
final Optional<Snak> optionalConfidence =
processGDMQualifiedAttribute(
CONFIDENCE_QUALIFIED_ATTRIBUTE_IDENTIFIER, statement.getConfidence());
final Optional<Snak> optionalEvidence =
processGDMQualifiedAttribute(
EVIDENCE_QUALIFIED_ATTRIBUTE_IDENTIFIER, statement.getEvidence());
final Optional<Snak> optionalOrder =
processGDMQualifiedAttribute(ORDER_QUALIFIED_ATTRIBUTE_IDENTIFIER, statement.getOrder());
// D:SWARM statement uuid
final Optional<Snak> optionalUUID =
processGDMQualifiedAttribute(
STATEMENT_UUID_QUALIFIED_ATTRIBUTE_IDENTIFIER, statement.getUUID());
addToSnakList(optionalConfidence, snakList);
addToSnakList(optionalEvidence, snakList);
addToSnakList(optionalOrder, snakList);
addToSnakList(optionalUUID, snakList);
if (snakList.isEmpty()) {
return Optional.empty();
}
return Optional.of(snakList);
}
