Examples with ChaseException fr.lirmm.graphik.graal.api.forward_chaining.ChaseException used on opensource projects

Example 11 with ChaseException

use of fr.lirmm.graphik.graal.api.forward_chaining.ChaseException in project graal by graphik-team.

the class DefaultKnowledgeBase method semiSaturate.

@Override
public void semiSaturate() throws KnowledgeBaseException {
    if (!this.isSemiSaturated) {
        this.compileRule();
        Chase chase = new BreadthFirstChase(this.ruleCompilation.getSaturation(), this.store);
        chase.setProfiler(this.getProfiler());
        try {
            chase.next();
        } catch (ChaseException e) {
            throw new KnowledgeBaseException(e);
        }
        this.isSemiSaturated = true;
    }
}

Example 12 with ChaseException

use of fr.lirmm.graphik.graal.api.forward_chaining.ChaseException in project graal by graphik-team.

the class ChaseWithGRDAndUnfiers method next.

// /////////////////////////////////////////////////////////////////////////
// METHODS
// /////////////////////////////////////////////////////////////////////////
@Override
public void next() throws ChaseException {
    Rule rule, unifiedRule;
    Substitution unificator;
    Queue<Triple<Rule, Substitution, InMemoryAtomSet>> newQueue = new LinkedList<Triple<Rule, Substitution, InMemoryAtomSet>>();
    InMemoryAtomSet newAtomSet = new DefaultInMemoryGraphStore();
    try {
        while (!queue.isEmpty()) {
            Triple<Rule, Substitution, InMemoryAtomSet> pair = queue.poll();
            if (pair != null) {
                unificator = pair.getMiddle();
                InMemoryAtomSet part = pair.getRight();
                rule = pair.getLeft();
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("\nExecute rule: {} with unificator {}", rule, unificator);
                }
                unifiedRule = DefaultUnifierAlgorithm.getTargetVariablesSubstitution().createImageOf(rule);
                unifiedRule = unificator.createImageOf(unifiedRule);
                unifiedRule.getBody().removeAll(part);
                unificator = targetToSource(unificator);
                ConjunctiveQuery query = DefaultConjunctiveQueryFactory.instance().create(unifiedRule.getBody(), new LinkedList<Term>(unifiedRule.getFrontier()));
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Rule to execute: {}", unifiedRule.toString());
                    LOGGER.debug("       -- Query: {}", query.toString());
                }
                // Get projections
                List<Substitution> projections = Iterators.toList(SmartHomomorphism.instance().execute(query, atomSet));
                try {
                    for (Substitution proj : projections) {
                        InMemoryAtomSet newFacts = proj.createImageOf(unifiedRule.getHead());
                        ConjunctiveQuery q = new DefaultConjunctiveQuery(newFacts);
                        if (!SmartHomomorphism.instance().execute(q, newAtomSet).hasNext()) {
                            // Existential variables instantiation added to proj
                            CloseableIterator<Atom> it = hc.apply(unifiedRule, proj, atomSet);
                            if (it.hasNext()) {
                                LinkedListAtomSet foundPart = new LinkedListAtomSet();
                                foundPart.addAll(it);
                                newAtomSet.addAll(foundPart);
                                // Makes the projection compatible with triggered rules unifiers
                                Substitution compatibleProj = targetToSource(proj);
                                for (Pair<Rule, Substitution> p : this.grd.getTriggeredRulesWithUnifiers(rule)) {
                                    Rule triggeredRule = p.getKey();
                                    Substitution u = p.getValue();
                                    if (u != null) {
                                        Substitution comp = unificator.compose(u);
                                        Substitution aggreg = compatibleProj.aggregate(comp);
                                        aggreg = forgetSource(aggreg);
                                        if (LOGGER.isDebugEnabled()) {
                                            LOGGER.debug("-- -- Dependency: {}", triggeredRule);
                                            LOGGER.debug("-- -- Substitution:{} ", compatibleProj);
                                            LOGGER.debug("-- -- Unificator: {}", u);
                                            LOGGER.debug("-- -- Aggregation: {}\n", aggreg);
                                        }
                                        if (aggreg != null) {
                                            newQueue.add(new ImmutableTriple<Rule, Substitution, InMemoryAtomSet>(triggeredRule, aggreg, foundPart));
                                        }
                                    }
                                }
                            }
                        }
                    }
                } catch (HomomorphismFactoryException e) {
                    throw new RuleApplicationException("Error during rule application", e);
                } catch (HomomorphismException e) {
                    throw new RuleApplicationException("Error during rule application", e);
                } catch (IteratorException e) {
                    throw new RuleApplicationException("Error during rule application", e);
                }
            }
        }
        queue = newQueue;
        atomSet.addAll(newAtomSet);
    } catch (Exception e) {
        e.printStackTrace();
        throw new ChaseException("An error occur pending saturation step.", e);
    }
}

Example 13 with ChaseException

use of fr.lirmm.graphik.graal.api.forward_chaining.ChaseException in project graal by graphik-team.

the class BreadthFirstChase method dispatchNewData.

// /////////////////////////////////////////////////////////////////////////
// PRIVATE CLASS
// /////////////////////////////////////////////////////////////////////////
protected void dispatchNewData(Collection<Atom> newData) throws ChaseException {
    for (Atom a : newData) {
        Predicate p = a.getPredicate();
        for (Rule r : ruleSet.getRulesByBodyPredicate(p)) {
            if (linearRuleCheck(r)) {
                AtomSet set = nextRulesToCheck.get(r);
                if (set == null) {
                    set = new DefaultInMemoryGraphStore();
                    nextRulesToCheck.put(r, set);
                }
                try {
                    set.add(a);
                } catch (AtomSetException e) {
                    throw new ChaseException("Exception while adding data into a tmp store", e);
                }
            } else {
                nextRulesToCheck.put(r, atomSet);
            }
        }
    }
}