Examples with OntologicalAtom ai.grakn.graql.internal.reasoner.atom.binary.OntologicalAtom used on opensource projects

Example 1 with OntologicalAtom

use of ai.grakn.graql.internal.reasoner.atom.binary.OntologicalAtom in project grakn by graknlabs.

the class GraqlTraversalPlanner method planFromTraversal.

/**
 * @param atoms list of current atoms of interest
 * @param queryPattern corresponding pattern
 * @return an optimally ordered list of provided atoms
 */
static ImmutableList<Atom> planFromTraversal(List<Atom> atoms, PatternAdmin queryPattern, EmbeddedGraknTx<?> tx) {
    Multimap<VarProperty, Atom> propertyMap = HashMultimap.create();
    atoms.stream().filter(at -> !(at instanceof OntologicalAtom)).forEach(at -> at.getVarProperties().forEach(p -> propertyMap.put(p, at)));
    Set<VarProperty> properties = propertyMap.keySet();
    GraqlTraversal graqlTraversal = GreedyTraversalPlan.createTraversal(queryPattern, tx);
    ImmutableList<Fragment> fragments = graqlTraversal.fragments().iterator().next();
    ImmutableList.Builder<Atom> builder = ImmutableList.builder();
    builder.addAll(atoms.stream().filter(at -> at instanceof OntologicalAtom).iterator());
    builder.addAll(fragments.stream().map(Fragment::varProperty).filter(Objects::nonNull).filter(properties::contains).distinct().flatMap(p -> propertyMap.get(p).stream()).distinct().iterator());
    return builder.build();
}