private Entry getEntry(
InternalTitanTransaction tx,
InternalRelation edge,
InternalTitanVertex perspective,
Map<TitanType, TypeSignature> signatures,
boolean columnOnly) {
TitanType et = edge.getType();
long etid = et.getID();
int dirID;
if (edge.isProperty()) {
dirID = 0;
} else if (edge.getVertex(0).equals(perspective)) {
// Out TitanRelation
assert edge.isDirected() || edge.isUnidirected();
dirID = 2;
} else {
// In TitanRelation
assert !edge.isUnidirected() && edge.getVertex(1).equals(perspective);
dirID = 3;
}
int etIDLength = IDHandler.edgeTypeLength(etid, idManager);
ByteBuffer column = null, value = null;
if (et.isSimple()) {
if (et.isFunctional()) {
column = ByteBuffer.allocate(etIDLength);
IDHandler.writeEdgeType(column, etid, dirID, idManager);
} else {
column = ByteBuffer.allocate(etIDLength + VariableLong.positiveLength(edge.getID()));
IDHandler.writeEdgeType(column, etid, dirID, idManager);
VariableLong.writePositive(column, edge.getID());
}
column.flip();
if (!columnOnly) {
if (edge.isEdge()) {
long nodeIDDiff =
((TitanEdge) edge).getOtherVertex(perspective).getID() - perspective.getID();
int nodeIDDiffLength = VariableLong.length(nodeIDDiff);
if (et.isFunctional()) {
value =
ByteBuffer.allocate(nodeIDDiffLength + VariableLong.positiveLength(edge.getID()));
VariableLong.write(value, nodeIDDiff);
VariableLong.writePositive(value, edge.getID());
} else {
value = ByteBuffer.allocate(nodeIDDiffLength);
VariableLong.write(value, nodeIDDiff);
}
value.flip();
} else {
assert edge.isProperty();
DataOutput out = serializer.getDataOutput(defaultOutputCapacity, true);
// Write object
writeAttribute(out, (TitanProperty) edge);
if (et.isFunctional()) {
VariableLong.writePositive(out, edge.getID());
}
value = out.getByteBuffer();
}
}
} else {
TypeSignature ets = getSignature(tx, et, signatures);
InternalRelation[] keys = new InternalRelation[ets.keyLength()],
values = new InternalRelation[ets.valueLength()];
List<InternalRelation> rest = new ArrayList<InternalRelation>();
ets.sort(edge.getRelations(SimpleAtomicQuery.queryAll(edge), false), keys, values, rest);
DataOutput out = serializer.getDataOutput(defaultOutputCapacity, true);
IDHandler.writeEdgeType(out, etid, dirID, idManager);
for (int i = 0; i < keys.length; i++) writeInlineEdge(out, keys[i], ets.getKeyType(i));
if (!et.isFunctional()) {
VariableLong.writePositive(out, edge.getID());
}
column = out.getByteBuffer();
if (!columnOnly) {
out = serializer.getDataOutput(defaultOutputCapacity, true);
if (edge.isEdge()) {
long nodeIDDiff =
((TitanEdge) edge).getOtherVertex(perspective).getID() - perspective.getID();
VariableLong.write(out, nodeIDDiff);
} else {
assert edge.isProperty();
writeAttribute(out, (TitanProperty) edge);
}
if (et.isFunctional()) {
assert edge.isEdge();
VariableLong.writePositive(out, edge.getID());
}
for (int i = 0; i < values.length; i++)
writeInlineEdge(out, values[i], ets.getValueType(i));
for (InternalRelation v : rest) writeInlineEdge(out, v);
value = out.getByteBuffer();
}
}
return new Entry(column, value);
}
