/**
* Return true if the given predicated is tabled, currently this is true if the predicate is a
* tabled predicate or the predicate is a wildcard and some tabled predictes exist.
*/
public boolean isTabled(Node predicate) {
if (allTabled) return true;
if (predicate.isVariable() && !tabledPredicates.isEmpty()) {
return true;
} else {
return tabledPredicates.contains(predicate);
}
}
/**
* Register an RDF predicate as one whose presence in a goal should force the goal to be tabled.
*/
public synchronized void tablePredicate(Node predicate) {
tabledPredicates.add(predicate);
if (predicate == Node.ANY) allTabled = true;
}
/** Add all the rules and tabling instructions from an existing rulestore into this one. */
public void addAll(LPRuleStore store) {
super.addAll(store);
tabledPredicates.addAll(store.tabledPredicates);
allTabled = tabledPredicates.contains(Node.ANY);
}