Example usage for org.apache.commons.collections IteratorUtils emptyIterator

Introduction

In this page you can find the example usage for org.apache.commons.collections IteratorUtils emptyIterator.

Prototype

public static ResettableIterator emptyIterator() 

Source Link

Document

Gets an empty iterator.

Usage

From source file:com.steffi.index.ImgMapIndex.java

@Override
public ImgIndexHits<T> get(String key, Object value) {
    IndexKeyValue indexKeyValue = new IndexKeyValue(key, value);
    ConcurrentHashMap<Object, Boolean> idElements = getMap().get(indexKeyValue);

    if (idElements == null || idElements.isEmpty())
        return new ImgMapIndexHits<T>(IteratorUtils.emptyIterator(), 0, indexClass);
    else//from  w  ww. j  av  a 2s  . c o m
        return new ImgMapIndexHits<T>(idElements.keySet().iterator(), idElements.size(), indexClass);

}

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From source file:com.lh.leap.ui.LocationNodeImpl.java

public Enumeration children() {
    if (children == null)
        return IteratorUtils.asEnumeration(IteratorUtils.emptyIterator());
    return IteratorUtils.asEnumeration(children.iterator());
}

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From source file:com.steffi.model.Cell.java

public Iterable<String> getAttributeKeys() {
    return new Iterable<String>() {

        @SuppressWarnings("unchecked")
        @Override/*from   w  w w .j  av  a2  s.c  o  m*/
        public Iterator<String> iterator() {
            if (attributes != null) {
                final List<String> keys = new ArrayList<String>();
                final SteffiGraph graph = SteffiGraph.getInstance();

                attributes.forEachKey(new TIntProcedure() {
                    @Override
                    public boolean execute(int keyIndex) {
                        keys.add(graph.getItemName(keyIndex));
                        return true;
                    }
                });

                return keys.iterator();
            } else
                return IteratorUtils.emptyIterator();
        }
    };

}

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From source file:ca.sqlpower.object.annotation.SPAnnotationProcessor.java

@SuppressWarnings("unchecked")
@Override/*from w  w w.j a  v  a2s  . co  m*/
public Iterable<? extends Completion> getCompletions(Element element, AnnotationMirror annotation,
        ExecutableElement member, String userText) {
    return (Iterable<? extends Completion>) IteratorUtils.emptyIterator();
}

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From source file:hr.fer.zemris.vhdllab.view.explorer.ProjectExplorerView.java

@SuppressWarnings("unchecked")
private Iterator<HierarchyNode> getHierarchyIterator(Hierarchy hierarchy, HierarchyNode node) {
    Integer mode = getHierarchyMode();
    switch (mode) {
    case 0://from   ww  w  . j a v a  2  s  . com
        return hierarchy.iteratorXUsesYHierarchy(node);
    case 1:
        return hierarchy.iteratorXUsedByYHierarchy(node);
    case 2:
        if (node == null) {
            return hierarchy.iteratorFlatHierarchy();
        }
        return IteratorUtils.emptyIterator();
    default:
        throw new IllegalStateException(mode.toString());
    }
}

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From source file:org.apache.cayenne.query.SQLTemplate.java

/**
 * Returns an iterator over parameter sets. Each element returned from the
 * iterator is a java.util.Map.//www .ja  va 2s  .  c o m
 */
@SuppressWarnings("unchecked")
public Iterator<Map<String, ?>> parametersIterator() {
    return (parameters == null || parameters.length == 0) ? IteratorUtils.emptyIterator()
            : IteratorUtils.transformedIterator(IteratorUtils.arrayIterator(parameters), nullMapTransformer);
}

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From source file:org.apache.sling.resourceresolver.impl.ResourceResolverMangleNamespacesTest.java

@Before
public void setup() throws RepositoryException, LoginException {
    MockitoAnnotations.initMocks(this);
    activeSession = mockedSession;//from w  w  w.j  a  va2s  .c o m

    // Setup a ResourceResolverImpl with namespace mangling and unmangling
    final ResourceResolverFactoryActivator act = new ResourceResolverFactoryActivator() {
        @Override
        public boolean isMangleNamespacePrefixes() {
            return true;
        }
    };

    Mockito.when(mockedSession.getNamespacePrefix(NS_PREFIX)).thenReturn(NS_URL);

    final ResourceProvider<?> rp = new ResourceProvider<Object>() {

        @SuppressWarnings("unchecked")
        @Override
        public @CheckForNull <AdapterType> AdapterType adaptTo(final @Nonnull ResolveContext<Object> ctx,
                final @Nonnull Class<AdapterType> type) {
            if (type.equals(Session.class)) {
                return (AdapterType) activeSession;
            } else {
                return null;
            }
        }

        @Override
        public Resource getResource(ResolveContext<Object> ctx, String path, ResourceContext rCtx,
                Resource parent) {
            return null;
        }

        @SuppressWarnings("unchecked")
        @Override
        public Iterator<Resource> listChildren(ResolveContext<Object> ctx, Resource parent) {
            return IteratorUtils.emptyIterator();
        }
    };

    final CommonResourceResolverFactoryImpl fac = new CommonResourceResolverFactoryImpl(act);

    rr = new ResourceResolverImpl(fac, false, null, new ResourceProviderStorageProvider() {

        @Override
        public ResourceProviderStorage getResourceProviderStorage() {
            return new ResourceProviderStorage(
                    Arrays.asList(MockedResourceResolverImplTest.createRPHandler(rp, "rp1", 0, "/")));
        }
    });
}

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From source file:org.mule.routing.EventGroup.java

/**
 * Returns an iterator over a snapshot copy of this group's collected events.,
 * optionally sorted by arrival order.  If
 * you need to iterate over the group and e.g. remove select events, do so via
 * {@link #removeEvent(MuleEvent)}. If you need to do so atomically in order to
 * prevent e.g. concurrent reception/aggregation of the group during iteration,
 * wrap the iteration in a synchronized block on the group instance.
 *
 * @return an iterator over collected {@link MuleEvent}s.
 * @throws ObjectStoreException/*from   w w  w .  j  av  a2 s  . c  o m*/
 */
@SuppressWarnings("unchecked")
public Iterator<MuleEvent> iterator(boolean sortByArrival) throws ObjectStoreException {
    synchronized (events) {
        if (events.allKeys().isEmpty()) {
            return IteratorUtils.emptyIterator();
        } else {
            return IteratorUtils.arrayIterator(this.toArray(sortByArrival));
        }
    }
}

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From source file:org.objectstyle.cayenne.query.SQLTemplate.java

/**
 * Returns an iterator over parameter sets. Each element returned from the iterator is
 * a java.util.Map./*www  . j a v a  2  s. c  om*/
 */
public Iterator parametersIterator() {
    return (parameters == null || parameters.length == 0) ? IteratorUtils.emptyIterator()
            : IteratorUtils.transformedIterator(IteratorUtils.arrayIterator(parameters), nullMapTransformer);
}

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From source file:org.openmrs.module.amrsreports.reporting.data.evaluator.RegimenHistoryDataEvaluator.java

/**
 * Finds a history of regimens and reasons for change for each person in a cohort
 *
 * @param definition the RegimenHistoryDataDefinition to be evaluated
 * @param context    the evaluation context for a given report
 * @return an ordered list of RegimenChange objects for each person
 * @throws EvaluationException/*from w  w w. j  a va 2s . c o  m*/
 * @should find a regimen if it exists
 * @should return nothing if DrugSnapshots do not indicate a Regimen
 * @should only return a reason from the same encounter as the DrugSnapshot used to indicate a Regimen
 */
@Override
public EvaluatedPersonData evaluate(PersonDataDefinition definition, EvaluationContext context)
        throws EvaluationException {

    EvaluatedPersonData c = new EvaluatedPersonData(definition, context);

    if (context.getBaseCohort().isEmpty())
        return c;

    // get drug snapshots
    SortedSetMap<Integer, DrugSnapshot> snapshots = MOHReportUtil
            .getARVSnapshotsMapFromTables(context.getBaseCohort(), context.getEvaluationDate());

    // get relevant reason observations
    SortedSetMap<Integer, Obs> reasons = getReasons(context);

    // get birthdates
    EvaluatedPersonData birthDateData = Context.getService(PersonDataService.class)
            .evaluate(new BirthdateDataDefinition(), context);
    Map<Integer, Object> birthDates = birthDateData.getData();

    // build the regimen history
    for (Integer pId : snapshots.keySet()) {
        if (snapshots.get(pId) != null) {

            // find the birthdate
            Birthdate birthDate = null;
            if (birthDates.containsKey(pId)) {
                birthDate = (Birthdate) birthDates.get(pId);
            }

            // get iterators for snapshots and reasons
            Iterator<DrugSnapshot> dsI = snapshots.get(pId).iterator();
            Iterator<Obs> oI = reasons.containsKey(pId) ? reasons.get(pId).iterator()
                    : IteratorUtils.emptyIterator();

            Regimen lastRegimen = null;

            // crawl through snapshots
            List<RegimenChange> res = new ArrayList<RegimenChange>();
            while (dsI.hasNext()) {

                DrugSnapshot ds = dsI.next();
                if (ds != null) {

                    // get the current ageRange for this snapshot
                    String ageRange = getAgeRange(birthDate, ds.getDateTaken());

                    // figure out what regimens belong in this snapshot
                    List<Regimen> regimens = findPotentialRegimens(ds, ageRange);

                    // use the first regimen in the list
                    if (regimens != null && !regimens.isEmpty()) {
                        if (regimens.size() > 1) {
                            log.warn("Multiple regimens match " + ds + ", using " + regimens.get(0));
                        }

                        Regimen thisRegimen = regimens.get(0);

                        // only add a RegimenChange if thisRegimen is different from the last one
                        if (lastRegimen == null
                                || !OpenmrsUtil.nullSafeEquals(thisRegimen.getName(), lastRegimen.getName())) {

                            // update lastRegimen
                            lastRegimen = thisRegimen;

                            // fill out a change if this snapshot has regimens
                            RegimenChange rc = new RegimenChange();
                            rc.setRegimen(thisRegimen);
                            rc.setDateOccurred(ds.getDateTaken());

                            // find the reason
                            boolean found = false;
                            while (oI.hasNext() && !found) {
                                Obs o = oI.next();

                                // if the snapshot and reason come from the same encounter, we have a winner
                                if (OpenmrsUtil.nullSafeEquals(o.getEncounter().getId(),
                                        ds.getEncounter().getId())) {
                                    rc.setReason(o.getValueCoded().getDisplayString());
                                    found = true;
                                }
                            }

                            // whether the reason was found or not, add the change
                            res.add(rc);
                        }
                    }
                }
            }

            c.addData(pId, res);
        }
    }

    return c;
}

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