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);
}
private static String printGDMStatement(final Statement statement) {
final StringBuilder sb = new StringBuilder();
final Long id = statement.getId();
sb.append("{statement: id ='");
if (id != null) {
sb.append(id);
} else {
sb.append("no statement id available");
}
sb.append("' :: ");
final String uuid = statement.getUUID();
sb.append("uuid = '");
if (uuid != null) {
sb.append(uuid);
} else {
sb.append("no uuid available");
}
sb.append("' :: ");
final String subject = printGDMNode(statement.getSubject());
sb.append("subject = '").append(subject).append("' :: ");
final String predicateURI = statement.getPredicate().getUri();
sb.append("predicate = '").append(predicateURI).append("' :: ");
final String object = printGDMNode(statement.getObject());
sb.append("object = '").append(object).append("'}");
return sb.toString();
}