Example usage for org.apache.commons.collections4.iterators IteratorChain addIterator

Introduction

In this page you can find the example usage for org.apache.commons.collections4.iterators IteratorChain addIterator.

Prototype

public void addIterator(final Iterator<? extends E> iterator) 

Source Link

Document

Add an Iterator to the end of the chain

Usage

From source file:org.apache.jena.geosparql.spatial.property_functions.GenericSpatialPropertyFunction.java

private boolean checkBound(ExecutionContext execCxt, Node subject) {

    try {//from   w w  w.ja va 2s. com
        Graph graph = execCxt.getActiveGraph();

        IteratorChain<Triple> spatialTriples = new IteratorChain<>();

        //Check for Geometry and so GeometryLiterals.
        if (graph.contains(subject, Geo.HAS_GEOMETRY_NODE, null)) {
            //A Feature can have many geometries so add each of them. The check Geo.HAS_DEFAULT_GEOMETRY_NODE will only return one but requires the data to have these present.
            Iterator<Triple> geometryTriples = graph.find(subject, Geo.HAS_GEOMETRY_NODE, null);
            while (geometryTriples.hasNext()) {
                Node geometry = geometryTriples.next().getObject();
                spatialTriples.addIterator(graph.find(geometry, Geo.HAS_SERIALIZATION_NODE, null));
            }
        } else {
            //Check for Geo predicates against the feature when no geometry literals found.
            if (graph.contains(subject, SpatialExtension.GEO_LAT_NODE, null)
                    && graph.contains(subject, SpatialExtension.GEO_LON_NODE, null)) {
                Node lat = graph.find(subject, SpatialExtension.GEO_LAT_NODE, null).next().getObject();
                Node lon = graph.find(subject, SpatialExtension.GEO_LON_NODE, null).next().getObject();
                Node latLonGeometryLiteral = ConvertLatLon.toNode(lat, lon);
                Triple triple = new Triple(subject, Geo.HAS_GEOMETRY_NODE, latLonGeometryLiteral);
                spatialTriples.addIterator(Arrays.asList(triple).iterator());
            }
        }

        //Check through each Geometry and stop if one is accepted.
        boolean isMatched = false;
        while (spatialTriples.hasNext()) {

            Triple triple = spatialTriples.next();
            Node geometryLiteral = triple.getObject();
            GeometryWrapper targetGeometryWrapper = GeometryWrapper.extract(geometryLiteral);
            isMatched = checkSecondFilter(spatialArguments, targetGeometryWrapper);
            if (isMatched) {
                //Stop checking when match is true.
                break;
            }
        }

        return isMatched;
    } catch (DatatypeFormatException ex) {
        throw new ExprEvalException(ex.getMessage(), ex);
    }
}

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From source file:org.openvpms.archetype.rules.workflow.FreeSlotIterator.java

/**
 * Creates an iterator to handle the first and last free slot.
 * <p/>//ww  w  . j a v a  2s  .  c om
 * These cannot be determined by the findFreeSlots named query without using unions which are slow, so two other
 * queries are issued to find:
 * <ul>
 * <li>the start time of the earliest appointment intersecting the start of the date range (before)</li>
 * <li>the end time of the latest appointment intersecting the end of the date range (after)</li>
 * </ul>
 * If there is an appointment at the start, this is used to add a slot (fromDate, before).
 * <p/>
 * If there is an appointment at the end, this is used to add a slot (after, toDate).
 * <p/>
 * If there are no appointments, then a slot (fromDate, toDate) is added.
 *
 * @param iterator the slot iterator
 * @return an iterator that handles the first free slot in the date range
 */
private Iterator<Slot> createFirstLastFreeSlotIterator(Iterator<Slot> iterator, Entity schedule, Date fromDate,
        Date toDate, IArchetypeService service) {
    IteratorChain<Slot> result = new IteratorChain<Slot>();
    Date appointmentBefore = getAppointmentBefore(schedule, fromDate, toDate, service);
    Date appointmentAfter = getAppointmentAfter(schedule, fromDate, toDate, service);
    if (appointmentBefore != null || appointmentAfter != null) {
        if (appointmentBefore != null) {
            Slot slot = new Slot(schedule.getId(), fromDate, appointmentBefore);
            result.addIterator(Arrays.asList(slot).iterator());
        }
        result.addIterator(iterator);
        if (appointmentAfter != null) {
            Slot slot = new Slot(schedule.getId(), appointmentAfter, toDate);
            result.addIterator(Arrays.asList(slot).iterator());
        }
    } else {
        // no appointments
        Slot slot = new Slot(schedule.getId(), fromDate, toDate);
        result.addIterator(Arrays.asList(slot).iterator());
    }
    return result;
}

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