private List<Entry> queryForEntries(AtomicQuery query, TransactionHandle txh) {
ByteBuffer key = IDHandler.getKey(query.getVertexID());
List<Entry> entries = null;
LimitTracker limit = new LimitTracker(query);
boolean dirs[] = getAllowedDirections(query);
if (query.hasEdgeTypeCondition()) {
TitanType et = query.getTypeCondition();
if (!et.isNew()) { // Result set must be empty if TitanType is new
ArrayList<Object> applicableConstraints = null;
boolean isRange = false;
if (query.hasConstraints()) {
assert !et.isSimple();
TypeDefinition def = ((InternalTitanType) et).getDefinition();
String[] keysig = def.getKeySignature();
applicableConstraints = new ArrayList<Object>(keysig.length);
Map<String, Object> constraints = query.getConstraints();
for (int i = 0; i < keysig.length; i++) {
if (constraints.containsKey(keysig[i])) {
Object iv = constraints.get(keysig[i]);
applicableConstraints.add(iv);
if (iv != null && (iv instanceof AtomicInterval) && ((AtomicInterval) iv).isRange()) {
isRange = true;
break;
}
} else break;
}
if (applicableConstraints.isEmpty()) applicableConstraints = null;
}
for (int dirID = 0; dirID < 4; dirID++) {
if (dirs[dirID]) {
if (applicableConstraints != null) {
assert !applicableConstraints.isEmpty();
DataOutput start = serializer.getDataOutput(defaultOutputCapacity, true);
DataOutput end = null;
if (isRange) end = serializer.getDataOutput(defaultOutputCapacity, true);
IDHandler.writeEdgeType(start, et.getID(), dirID, idManager);
if (isRange) IDHandler.writeEdgeType(end, et.getID(), dirID, idManager);
// Write all applicable key constraints
for (Object iv : applicableConstraints) {
if (iv instanceof AtomicInterval) {
AtomicInterval interval = (AtomicInterval) iv;
if (interval.isPoint()) {
start.writeObject(interval.getStartPoint());
if (isRange) end.writeObject(interval.getStartPoint());
} else {
assert isRange;
assert interval.isRange();
ByteBuffer startColumn, endColumn;
if (interval.getStartPoint() != null) {
start.writeObject(interval.getStartPoint());
startColumn = start.getByteBuffer();
if (!interval.startInclusive())
startColumn = ByteBufferUtil.nextBiggerBuffer(startColumn);
} else {
assert interval.startInclusive();
startColumn = start.getByteBuffer();
}
if (interval.getEndPoint() != null) {
end.writeObject(interval.getEndPoint());
} else {
assert interval.endInclusive();
}
endColumn = end.getByteBuffer();
if (interval.endInclusive())
endColumn = ByteBufferUtil.nextBiggerBuffer(endColumn);
entries = appendResults(key, startColumn, endColumn, entries, limit, txh);
break; // redundant, this must be the last iteration because its a range
}
} else {
assert iv == null || (iv instanceof TitanVertex);
long id = 0;
if (iv != null) id = ((TitanVertex) iv).getID();
VariableLong.writePositive(start, id);
if (isRange) VariableLong.writePositive(end, id);
}
}
if (!isRange)
entries = appendResults(key, start.getByteBuffer(), entries, limit, txh);
} else {
ByteBuffer columnStart = IDHandler.getEdgeType(et.getID(), dirID, idManager);
entries = appendResults(key, columnStart, entries, limit, txh);
}
}
}
}
} else if (query.hasGroupCondition()) {
int groupid = query.getGroupCondition().getID();
for (int dirID = 0; dirID < 4; dirID++) {
if (dirs[dirID]) {
ByteBuffer columnStart = IDHandler.getEdgeTypeGroup(groupid, dirID, idManager);
entries = appendResults(key, columnStart, entries, limit, txh);
}
}
} else {
int lastDirID = -1;
for (int dirID = 0; dirID <= 4; dirID++) {
if ((dirID >= 4 || !dirs[dirID]) && lastDirID >= 0) {
ByteBuffer columnStart = IDHandler.getEdgeTypeGroup(0, lastDirID, idManager);
ByteBuffer columnEnd =
IDHandler.getEdgeTypeGroup(idManager.getMaxGroupID() + 1, dirID - 1, idManager);
entries = appendResults(key, columnStart, columnEnd, entries, limit, txh);
lastDirID = -1;
}
if (dirID < 4) {
if (dirs[dirID] && lastDirID == -1) lastDirID = dirID;
}
}
}
if (entries == null) return ImmutableList.of();
else return entries;
}
protected void loadRelations(
Iterable<Entry> entries, VertexRelationLoader loader, InternalTitanTransaction tx) {
Map<String, TitanType> etCache = new HashMap<String, TitanType>();
TitanType titanType = null;
for (Entry entry : entries) {
ByteBuffer column = entry.getColumn();
int dirID = IDHandler.getDirectionID(column.get(column.position()));
long etid = IDHandler.readEdgeType(column, idManager);
if (titanType == null || titanType.getID() != etid) {
titanType = getTypeFromID(etid, tx);
}
Object[] keys = null;
if (!titanType.isSimple()) {
TypeDefinition def = ((InternalTitanType) titanType).getDefinition();
String[] keysig = def.getKeySignature();
keys = new Object[keysig.length];
for (int i = 0; i < keysig.length; i++)
keys[i] = readInline(column, getEdgeType(keysig[i], etCache, tx));
}
long edgeid = 0;
if (!titanType.isFunctional()) {
edgeid = VariableLong.readPositive(column);
}
ByteBuffer value = entry.getValue();
if (titanType.isEdgeLabel()) {
long nodeIDDiff = VariableLong.read(value);
if (titanType.isFunctional()) edgeid = VariableLong.readPositive(value);
assert edgeid > 0;
long otherid = loader.getVertexId() + nodeIDDiff;
assert dirID == 3 || dirID == 2;
Direction dir = dirID == 3 ? Direction.IN : Direction.OUT;
if (!tx.isDeletedRelation(edgeid))
loader.loadEdge(edgeid, (TitanLabel) titanType, dir, otherid);
} else {
assert titanType.isPropertyKey();
assert dirID == 0;
TitanKey propType = ((TitanKey) titanType);
Object attribute = null;
if (hasGenericDataType(propType)) {
attribute = serializer.readClassAndObject(value);
} else {
attribute = serializer.readObjectNotNull(value, propType.getDataType());
}
assert attribute != null;
if (titanType.isFunctional()) edgeid = VariableLong.readPositive(value);
assert edgeid > 0;
if (!tx.isDeletedRelation(edgeid)) loader.loadProperty(edgeid, propType, attribute);
}
// Read value inline edges if any
if (!titanType.isSimple()) {
TypeDefinition def = ((InternalTitanType) titanType).getDefinition();
// First create all keys buffered above
String[] keysig = def.getKeySignature();
for (int i = 0; i < keysig.length; i++) {
createInlineEdge(loader, getEdgeType(keysig[i], etCache, tx), keys[i]);
}
// value signature
for (String str : def.getCompactSignature())
readLabel(loader, value, getEdgeType(str, etCache, tx));
// Third: read rest
while (value.hasRemaining()) {
TitanType type =
(TitanType) tx.getExistingVertex(IDHandler.readInlineEdgeType(value, idManager));
readLabel(loader, value, type);
}
}
}
}