/** Return true if the given pattern occurs somewhere in the find sequence. */
@Override
public boolean contains(TriplePattern pattern) {
return graph.contains(pattern.getSubject(), pattern.getPredicate(), pattern.getObject());
}
/**
* this is a simple-minded implementation of containsNode that uses find up to three times to
* locate the node. Almost certainly particular graphs will be able to offer better query-handlers
* ...
*/
public boolean containsNode(Node n) {
return graph.contains(n, Node.ANY, Node.ANY)
|| graph.contains(Node.ANY, n, Node.ANY)
|| graph.contains(Node.ANY, Node.ANY, n);
}