private void mergeGraph(GraphModel merge) {
// Add any new nodes
for (GraphNode node : merge.getNodes()) {
if (null == resultModel.findNode(node.getId())) {
// TODO: Should be cloning the node.
resultModel.addNode(node);
// Speed up edge lookups
Set<GraphEdge> empty = Sets.newHashSet();
headToEdges.put(node, empty);
}
}
// Add any new edges
for (GraphEdge edge : merge.getEdges()) {
Set<GraphEdge> forHead = headToEdges.get(edge.getHead());
if (null == forHead) {
continue;
}
if (!forHead.contains(edge)) {
resultModel.addEdge(edge.getRelation(), edge.getHead(), edge.getTail());
forHead.add(edge);
}
}
}
