Examples with ExtendedIterator org.apache.jena.util.iterator.ExtendedIterator used on opensource projects

Example 6 with ExtendedIterator

use of org.apache.jena.util.iterator.ExtendedIterator in project jena by apache.

the class ShapesParser method accTarget.

private static void accTarget(Collection<Target> acc, Graph shapesGraph, Node shape, TargetType targetType) {
    ExtendedIterator<Triple> iter = shapesGraph.find(shape, targetType.predicate, null);
    Graph graph;
    switch(targetType) {
        // Java 14 has "->"
        case targetExtension:
            graph = shapesGraph;
            break;
        // These do not need access to the shapes graph so don't force holding on the the graph reference.
        case implicitClass:
        case targetClass:
        case targetNode:
        case targetObjectsOf:
        case targetSubjectsOf:
        default:
            graph = null;
            break;
    }
    try {
        iter.mapWith(triple -> Target.create(triple.getSubject(), targetType, triple.getObject(), graph)).forEachRemaining(target -> acc.add(target));
    } finally {
        iter.close();
    }
}

Example 7 with ExtendedIterator

use of org.apache.jena.util.iterator.ExtendedIterator in project jena by apache.

the class GenericPropertyFunction method bothUnbound.

private QueryIterator bothUnbound(Binding binding, Node subject, Node predicate, Node object, ExecutionContext execCxt) {
    QueryIterConcat queryIterConcat = new QueryIterConcat(execCxt);
    Var subjectVar = Var.alloc(subject.getName());
    Graph graph = execCxt.getActiveGraph();
    // Search for both Features and Geometry in the Graph. Reliant upon consistent usage of SpatialObject (which is base class of Feature and Geometry) if present.
    ExtendedIterator<Triple> subjectTriples;
    if (graph.contains(null, RDF.type.asNode(), Geo.SPATIAL_OBJECT_NODE)) {
        subjectTriples = graph.find(null, RDF.type.asNode(), Geo.SPATIAL_OBJECT_NODE);
    } else if (graph.contains(null, RDF.type.asNode(), Geo.FEATURE_NODE) || graph.contains(null, RDF.type.asNode(), Geo.GEOMETRY_NODE)) {
        ExtendedIterator<Triple> featureTriples = graph.find(null, RDF.type.asNode(), Geo.FEATURE_NODE);
        ExtendedIterator<Triple> geometryTriples = graph.find(null, RDF.type.asNode(), Geo.GEOMETRY_NODE);
        subjectTriples = featureTriples.andThen(geometryTriples);
    } else {
        // Check for Geo Predicate Features in the Graph if no GeometryLiterals found.
        subjectTriples = graph.find(null, SpatialExtension.GEO_LAT_NODE, null);
    }
    // Bind all the Spatial Objects or Geo Predicates once as the subject and search for corresponding Objects.
    while (subjectTriples.hasNext()) {
        Triple subjectTriple = subjectTriples.next();
        Node boundSubject = subjectTriple.getSubject();
        Binding subjectBind = BindingFactory.binding(binding, subjectVar, boundSubject);
        QueryIterator queryIter = oneBound(subjectBind, boundSubject, predicate, object, execCxt);
        queryIterConcat.add(queryIter);
    }
    return queryIterConcat;
}