/** Return the number of triples in the inferred graph */
@Override
public int graphBaseSize() {
checkOpen();
if (!isPrepared) {
prepare();
}
int baseSize = fdata.getGraph().size();
int dedSize = fdeductions.getGraph().size();
// System.err.println( ">> BasicForwardRuleInfGraph::size = " + baseSize + "(base) + " + dedSize
// + "(deductions)" );
return baseSize + dedSize;
}
/**
* Create the graph used to hold the deductions. Can be overridden by subclasses that need special
* purpose graph implementations here. Assumes the graph underlying fdeductions and associated
* SafeGraph wrapper can be reused if present thus enabling preservation of listeners.
*/
protected Graph createDeductionsGraph() {
if (fdeductions != null) {
Graph dg = fdeductions.getGraph();
if (dg != null) {
// Reuse the old graph in order to preserve any listeners
safeDeductions.getBulkUpdateHandler().removeAll();
return dg;
}
}
Graph dg = Factory.createGraphMem(style);
safeDeductions = new SafeGraph(dg);
return dg;
}
/** Removes the triple t (if possible) from the set belonging to this graph. */
@Override
public void performDelete(Triple t) {
version++;
if (fdata != null) {
Graph data = fdata.getGraph();
if (data != null) {
data.delete(t);
}
}
if (isPrepared) {
fdeductions.getGraph().delete(t);
}
}
/**
* Adds a set of precomputed triples to the deductions store. These do not, themselves, fire any
* rules but provide additional axioms that might enable future rule firing when real data is
* added. Used to implement bindSchema processing in the parent Reasoner.
*
* @return return true if the rule set has also been loaded
*/
protected boolean preloadDeductions(Graph preloadIn) {
Graph d = fdeductions.getGraph();
BasicForwardRuleInfGraph preload = (BasicForwardRuleInfGraph) preloadIn;
// If the rule set is the same we can reuse those as well
if (preload.rules == rules) {
// Load raw deductions
for (Iterator<Triple> i = preload.find(null, null, null); i.hasNext(); ) {
d.add(i.next());
}
engine.setRuleStore(preload.engine.getRuleStore());
return true;
} else {
return false;
}
}
/**
* Internals of findWithContinuation implementation which allows control over functor filtering.
*/
private ExtendedIterator<Triple> findWithContinuation(
TriplePattern pattern, Finder continuation, boolean filter) {
checkOpen();
if (!isPrepared) prepare();
ExtendedIterator<Triple> result = null;
if (fdata == null) {
result = fdeductions.findWithContinuation(pattern, continuation);
} else {
if (continuation == null) {
result = fdata.findWithContinuation(pattern, fdeductions);
} else {
result = fdata.findWithContinuation(pattern, FinderUtil.cascade(fdeductions, continuation));
}
}
if (filter && filterFunctors) {
return result.filterDrop(Functor.acceptFilter);
} else {
return result;
}
}
/** Assert a new triple in the deduction graph, bypassing any processing machinery. */
public void silentAdd(Triple t) {
fdeductions.getGraph().add(t);
}