Examples with IteratorException fr.lirmm.graphik.util.stream.IteratorException used on opensource projects

Example 1 with IteratorException

use of fr.lirmm.graphik.util.stream.IteratorException in project graal by graphik-team.

the class StatBootstrapper method exec.

// /////////////////////////////////////////////////////////////////////////
// 
// /////////////////////////////////////////////////////////////////////////
@Override
public CloseableIterator<Term> exec(final VarSharedData v, Collection<Atom> preAtoms, Collection<Atom> postAtoms, final AtomSet data, RulesCompilation rc) throws BacktrackException {
    if (!(data instanceof Store)) {
        return fallback.exec(v, preAtoms, postAtoms, data, rc);
    }
    Store store = (Store) data;
    Set<Term> terms = null;
    if (this.getProfiler() != null) {
        this.getProfiler().start("BootstrapTime");
        this.getProfiler().start("BootstrapTimeFirstPart");
    }
    Iterator<Atom> it;
    Collection<Constant> constants = null;
    Atom aa = null;
    it = postAtoms.iterator();
    while (it.hasNext()) {
        Atom a = it.next();
        if (constants == null || constants.isEmpty()) {
            constants = a.getConstants();
            aa = a;
        }
    }
    it = preAtoms.iterator();
    while (it.hasNext()) {
        Atom a = it.next();
        if (constants == null || constants.isEmpty()) {
            constants = a.getConstants();
            aa = a;
        }
    }
    try {
        if (constants != null && !constants.isEmpty()) {
            terms = new HashSet<Term>();
            for (Pair<Atom, Substitution> im : rc.getRewritingOf(aa)) {
                int pos = im.getLeft().indexOf(im.getRight().createImageOf(v.value));
                CloseableIterator<Atom> match = data.match(im.getLeft());
                while (match.hasNext()) {
                    terms.add(match.next().getTerm(pos));
                }
            }
        }
        if (this.getProfiler() != null) {
            this.getProfiler().stop("BootstrapTimeFirstPart");
        }
        if (terms == null) {
            Atom a = null, tmp;
            double probaA = 1.1;
            it = postAtoms.iterator();
            while (it.hasNext()) {
                tmp = it.next();
                double p = ProbaUtils.computeProba(tmp, store, rc);
                if (p < probaA) {
                    a = tmp;
                    p = probaA;
                }
            }
            it = preAtoms.iterator();
            while (it.hasNext()) {
                tmp = it.next();
                double p = ProbaUtils.computeProba(tmp, store, rc);
                if (p < probaA) {
                    a = tmp;
                    p = probaA;
                }
            }
            terms = BootstrapperUtils.computeCandidatesOverRewritings(a, v, data, rc);
        }
        if (this.getProfiler() != null) {
            this.getProfiler().stop("BootstrapTime");
        }
        if (terms == null) {
            return data.termsIterator();
        } else {
            return new CloseableIteratorAdapter<Term>(terms.iterator());
        }
    } catch (AtomSetException e) {
        throw new BacktrackException(e);
    } catch (IteratorException e) {
        throw new BacktrackException(e);
    }
}

Example 2 with IteratorException

use of fr.lirmm.graphik.util.stream.IteratorException in project graal by graphik-team.

the class AbstractSubstitution method apply.

@Override
public void apply(AtomSet src, AtomSet dest) throws AtomSetException {
    CloseableIterator<Atom> it = src.iterator();
    try {
        while (it.hasNext()) {
            Atom a = it.next();
            dest.add(this.createImageOf(a));
        }
    } catch (IteratorException e) {
        throw new AtomSetException("Error during the iteration over src");
    }
}

Example 3 with IteratorException

use of fr.lirmm.graphik.util.stream.IteratorException in project graal by graphik-team.

the class RdbmsAtomIterator method hasNext.

// /////////////////////////////////////////////////////////////////////////
// METHODS
// /////////////////////////////////////////////////////////////////////////
@Override
public boolean hasNext() throws IteratorException {
    if (!this.hasNextCallDone) {
        this.hasNextCallDone = true;
        while (this.predicateIt.hasNext() && (this.atomIt == null || !this.atomIt.hasNext())) {
            Predicate p = predicateIt.next();
            List<Term> terms = new LinkedList<Term>();
            VariableGenerator gen = new DefaultVariableGenerator("X");
            for (int i = 0; i < p.getArity(); ++i) {
                terms.add(gen.getFreshSymbol());
            }
            InMemoryAtomSet atomSet = new LinkedListAtomSet();
            Atom atom = new DefaultAtom(p, terms);
            atomSet.add(atom);
            ConjunctiveQuery query = DefaultConjunctiveQueryFactory.instance().create(atomSet);
            SqlHomomorphism solver = SqlHomomorphism.instance();
            try {
                this.atomIt = new SubstitutionIterator2AtomIterator(atom, solver.execute(query, this.store));
            } catch (HomomorphismException e) {
                throw new IteratorException(e);
            }
        }
    }
    return this.atomIt != null && this.atomIt.hasNext();
}

Example 4 with IteratorException

use of fr.lirmm.graphik.util.stream.IteratorException in project graal by graphik-team.

the class Neo4jStore method getPredicates.

@Override
public Set<Predicate> getPredicates() throws AtomSetException {
    TreeSet<Predicate> set = new TreeSet<Predicate>();
    CloseableIterator<Predicate> it = this.predicatesIterator();
    try {
        while (it.hasNext()) {
            set.add(it.next());
        }
    } catch (IteratorException e) {
        throw new AtomSetException("An errors occurs while iterating predicates", e);
    }
    return set;
}

Example 5 with IteratorException

use of fr.lirmm.graphik.util.stream.IteratorException in project graal by graphik-team.

the class RDF4jStore method getPredicates.

@Override
public Set<Predicate> getPredicates() throws AtomSetException {
    TreeSet<Predicate> set = new TreeSet<Predicate>();
    CloseableIterator<Predicate> it = this.predicatesIterator();
    try {
        while (it.hasNext()) {
            set.add(it.next());
        }
    } catch (IteratorException e) {
        throw new AtomSetException("An error occurs during iteration over predicates", e);
    }
    return set;
}