/**
* helper to load nodes relation to document
*
* @param document relationLink document/link
* @param direction "in" or "out"
* @return INode instance or null
*/
private @Nullable INode getRelatedEntity(ODocument document, String direction) {
Object nodeO = document.field(direction, ORecordId.class);
if (nodeO == null) {
logger.error(
"Could not create related entity while converting relation with direction " + direction);
return null;
}
if (nodeO instanceof ORecordId) nodeO = repositoryFactory.getDb().load((ORecordId) nodeO);
if (nodeO == null) {
logger.error("Invalid record in direction " + direction + ": " + document.toString());
return null;
}
// convert
ODocument nodeDoc = (ODocument) nodeO;
// slim node: just set title and id
INode node = new Node();
node.setTitle(nodeDoc.field("title"));
node.setId(nodeDoc.getIdentity().toString());
return node;
/*
old -not performant
String id;
if (relationO instanceof OIdentifiable) id = ((ORecordId)relationO).getIdentity().toString();
else {
logger.error("Invalid class type: " + relationO.getClass().getName());
return null;
}
return nodeRepository.find(id);*/
}
@Override
public void deleteByRelation(INode node) {
// delete source reference pointing to relation node
OSQLSynchQuery<ODocument> query =
new OSQLSynchQuery<>(
"select * from Relation where relationLink.in = "
+ node.getId()
+ " OR relationLink.out = "
+ node.getId());
List<ODocument> result = db.command(query).execute();
// remove relation and link
for (ODocument document : result) {
ODocument relationLink = getRelationLink(document, true);
if (relationLink != null && db.load(relationLink.getIdentity()) != null)
relationLink.delete();
document.delete();
}
}
@Override
public List<IRelation> findByRelation(INode node) {
List<IRelation> list = new LinkedList<>();
// no NPEs
if (node == null) return list;
initDb();
// execute query
OSQLSynchQuery<ODocument> query =
new OSQLSynchQuery<>(
"select * from Relation where relationLink.in = "
+ node.getId()
+ " OR relationLink.out = "
+ node.getId());
List<ODocument> result = db.command(query).execute();
// populate set
for (ODocument document : result) list.add(convertToEntity(document));
return list;
}