private void connectRelationship(
NodeRecord firstNode,
NodeRecord secondNode,
RelationshipRecord rel,
RecordAccess<Long, RelationshipRecord, Void> relRecords,
RecordAccess<Long, RelationshipGroupRecord, Integer> relGroupRecords) {
// Assertion interpreted: if node is a normal node and we're trying to create a
// relationship that we already have as first rel for that node --> error
assert firstNode.getNextRel() != rel.getId() || firstNode.isDense();
assert secondNode.getNextRel() != rel.getId() || secondNode.isDense();
if (!firstNode.isDense()) {
rel.setFirstNextRel(firstNode.getNextRel());
}
if (!secondNode.isDense()) {
rel.setSecondNextRel(secondNode.getNextRel());
}
if (!firstNode.isDense()) {
connect(firstNode, rel, relRecords);
} else {
connectRelationshipToDenseNode(firstNode, rel, relRecords, relGroupRecords);
}
if (!secondNode.isDense()) {
if (firstNode.getId() != secondNode.getId()) {
connect(secondNode, rel, relRecords);
} else {
rel.setFirstInFirstChain(true);
rel.setSecondPrevRel(rel.getFirstPrevRel());
}
} else if (firstNode.getId() != secondNode.getId()) {
connectRelationshipToDenseNode(secondNode, rel, relRecords, relGroupRecords);
}
if (!firstNode.isDense()) {
firstNode.setNextRel(rel.getId());
}
if (!secondNode.isDense()) {
secondNode.setNextRel(rel.getId());
}
}
private void connect(
long nodeId,
long firstRelId,
RelationshipRecord rel,
RecordAccess<Long, RelationshipRecord, Void> relRecords) {
long newCount = 1;
if (firstRelId != Record.NO_NEXT_RELATIONSHIP.intValue()) {
locker.getWriteLock(firstRelId);
RelationshipRecord firstRel = relRecords.getOrLoad(firstRelId, null).forChangingLinkage();
boolean changed = false;
if (firstRel.getFirstNode() == nodeId) {
newCount = firstRel.getFirstPrevRel() + 1;
firstRel.setFirstPrevRel(rel.getId());
firstRel.setFirstInFirstChain(false);
changed = true;
}
if (firstRel.getSecondNode() == nodeId) {
newCount = firstRel.getSecondPrevRel() + 1;
firstRel.setSecondPrevRel(rel.getId());
firstRel.setFirstInSecondChain(false);
changed = true;
}
if (!changed) {
throw new InvalidRecordException(nodeId + " doesn't match " + firstRel);
}
}
// Set the relationship count
if (rel.getFirstNode() == nodeId) {
rel.setFirstPrevRel(newCount);
rel.setFirstInFirstChain(true);
}
if (rel.getSecondNode() == nodeId) {
rel.setSecondPrevRel(newCount);
rel.setFirstInSecondChain(true);
}
}
@Override
long get(RelationshipRecord rel) {
return rel.isFirstInFirstChain()
? Record.NO_NEXT_RELATIONSHIP.intValue()
: rel.getFirstPrevRel();
}