@Override
public TitanEdge addEdge(TitanVertex outVertex, TitanVertex inVertex, TitanLabel label) {
verifyWriteAccess(outVertex, inVertex);
outVertex = ((InternalVertex) outVertex).it();
inVertex = ((InternalVertex) inVertex).it();
Preconditions.checkNotNull(label);
Lock uniqueLock = FakeLock.INSTANCE;
if (config.hasVerifyUniqueness()
&& (label.isUnique(Direction.OUT) || label.isUnique(Direction.IN)))
uniqueLock = getUniquenessLock(outVertex, label, inVertex);
uniqueLock.lock();
try {
// Check uniqueness
if (config.hasVerifyUniqueness()) {
if (label.isUnique(Direction.OUT)) {
Preconditions.checkArgument(
Iterables.isEmpty(
query(outVertex)
.includeHidden()
.type(label)
.direction(Direction.OUT)
.titanEdges()),
"An edge with the given type already exists on the out-vertex");
}
if (label.isUnique(Direction.IN)) {
Preconditions.checkArgument(
Iterables.isEmpty(
query(inVertex).includeHidden().type(label).direction(Direction.IN).titanEdges()),
"An edge with the given type already exists on the in-vertex");
}
}
StandardEdge edge =
new StandardEdge(
temporaryID.decrementAndGet(),
label,
(InternalVertex) outVertex,
(InternalVertex) inVertex,
ElementLifeCycle.New);
if (config.hasAssignIDsImmediately()) graph.assignID(edge);
connectRelation(edge);
return edge;
} finally {
uniqueLock.unlock();
}
}
public InlineTitanEdge(TitanLabel type, InternalTitanVertex start, InternalTitanVertex end) {
super(type, start, end);
Preconditions.checkArgument(type.isUnidirected(), "Inline Relationships must be unidirected!");
}