private void addNode(GraphNode graphNode) {
if (graphNodeMap == null) {
graphNodeMap = new HashMap<String, GraphNode<?>>();
} else {
final AttributeNode old = graphNodeMap.get(graphNode.getRegistrationName());
if (old != null) {
log.debugf(
"Encountered request to add entity graph node [%s] using a name [%s] under which another "
+ "node is already registered [%s]",
old.getClass().getName(),
graphNode.getRegistrationName(),
graphNode.getClass().getName());
}
}
graphNodeMap.put(graphNode.getAttributeName(), graphNode);
}
