@Override
public Node getNodeForNodeId(NodeId id) {
if (NodeId.isAny(id)) return Node.ANY;
if (passthrough) return base.getNodeForNodeId(id);
long x = id.getId();
if (x < allocOffset) return base.getNodeForNodeId(id);
id = mapToJournal(id);
Node node = nodeTableJournal.getNodeForNodeId(id);
return node;
}
@Override
public NodeId getNodeIdForNode(Node node) {
if (node == Node.ANY) return NodeId.NodeIdAny;
if (passthrough) return base.getNodeIdForNode(node);
NodeId nodeId = nodeTableJournal.getNodeIdForNode(node);
if (!NodeId.isDoesNotExist(nodeId)) return mapFromJournal(nodeId);
nodeId = base.getNodeIdForNode(node);
return nodeId;
}
@Override
public NodeId getAllocateNodeId(Node node) {
if (passthrough) return base.getAllocateNodeId(node);
NodeId nodeId = getNodeIdForNode(node);
if (!NodeId.isDoesNotExist(nodeId)) return nodeId;
// add to journal
nodeId = allocate(node);
return nodeId;
}
/** Copy from the journal file to the real file */
/*package*/ void append() {
Iterator<Pair<NodeId, Node>> iter = nodeTableJournal.all();
Pair<NodeId, Node> firstPair = null;
Pair<NodeId, Node> lastPair = null;
for (; iter.hasNext(); ) {
Pair<NodeId, Node> x = iter.next();
if (firstPair == null) firstPair = x;
lastPair = x;
NodeId nodeId = x.getLeft();
Node node = x.getRight();
debug(" append: %s -> %s", x, mapFromJournal(nodeId));
// This does the write.
NodeId nodeId2 = base.getAllocateNodeId(node);
if (!nodeId2.equals(mapFromJournal(nodeId))) inconsistent(node, nodeId, nodeId2);
}
}
/** Convert from a id in other to an external id */
private NodeId mapFromJournal(NodeId id) {
if (passthrough) throw new TDBTransactionException("Not in an active transaction");
if (NodeId.isInline(id)) return id;
return NodeId.create(id.getId() + allocOffset);
}
@Override
public boolean containsNode(Node node) {
NodeId x = getNodeIdForNode(node);
return NodeId.isDoesNotExist(x);
}