Example usage for com.google.common.collect Iterators transform

Introduction

In this page you can find the example usage for com.google.common.collect Iterators transform.

Prototype

public static <F, T> Iterator<T> transform(final Iterator<F> fromIterator,
        final Function<? super F, ? extends T> function)

Source Link

Document

Returns an iterator that applies function to each element of fromIterator .

Usage

From source file:com.joyveb.dbpimpl.cass.prepare.core.DefaultSchemaOperations.java

@Override
public IngestOperation alterIndexes(String tableName, Class<?> entityClass) {

    Assert.notNull(entityClass);// w  w w.  j  a  v a 2s . c o  m

    List<String> cqlList = alterIndexesCql(tableName, entityClass);

    Iterator<Statement> queryIterator = Iterators.transform(cqlList.iterator(),
            new Function<String, Statement>() {

                @Override
                public Statement apply(String cql) {
                    return new SimpleStatement(cql);
                }

            });
    return new DefaultIngestOperation(session, queryIterator);

}

From source file:org.apache.jackrabbit.oak.jcr.delegate.VersionHistoryDelegate.java

@Nonnull
public Iterator<VersionDelegate> getAllVersions() throws RepositoryException {
    List<NodeDelegate> versions = new ArrayList<NodeDelegate>();
    for (Iterator<NodeDelegate> it = getChildren(); it.hasNext();) {
        NodeDelegate n = it.next();//  w w  w.j  a v a2 s. c om
        String primaryType = n.getProperty(JcrConstants.JCR_PRIMARYTYPE).getString();
        if (primaryType.equals(VersionConstants.NT_VERSION)) {
            versions.add(n);
        }
    }
    // best-effort sort by created time stamp, see JCR 2.0, 15.1.1.2
    Collections.sort(versions, new Comparator<NodeDelegate>() {
        @Override
        public int compare(NodeDelegate n1, NodeDelegate n2) {
            try {
                PropertyDelegate c1 = n1.getPropertyOrNull(JcrConstants.JCR_CREATED);
                PropertyDelegate c2 = n2.getPropertyOrNull(JcrConstants.JCR_CREATED);
                if (c1 != null && c2 != null) {
                    return c1.getDate().compareTo(c2.getDate());
                } else if (c1 != null) {
                    return 1;
                } else if (c2 != null) {
                    return -1;
                } else {
                    return 0;
                }
            } catch (RepositoryException ex) {
                // best effort
                return 0;
            }
        }
    });
    final Tree thisTree = getTree();
    return Iterators.transform(versions.iterator(), new Function<NodeDelegate, VersionDelegate>() {
        @Override
        public VersionDelegate apply(NodeDelegate nd) {
            return VersionDelegate.create(sessionDelegate, thisTree.getChild(nd.getName()));
        }
    });
}

From source file:es.usc.citius.composit.wsc08.data.WSCLazyServiceProvider.java

@Override
public Iterable<Service<Concept>> getServices() {
    return new Iterable<Service<Concept>>() {
        @Override/*from w w  w  .  j  ava 2 s  .c o  m*/
        public Iterator<Service<Concept>> iterator() {
            return Iterators.transform(delegatedProvider.getServices().iterator(),
                    new Function<Service<String>, Service<Concept>>() {
                        @Override
                        public Service<Concept> apply(Service<String> srv) {
                            return translate(srv);
                        }
                    });
        }
    };
}

From source file:com.thinkbiganalytics.metadata.modeshape.sla.JcrServiceLevelAgreement.java

public List<ServiceLevelAgreementCheck> getSlaChecks() {

    List<ServiceLevelAgreementCheck> list = new ArrayList<>();

    try {//  www  . j a v a  2s. co m
        @SuppressWarnings("unchecked")
        Iterator<Node> itr = (Iterator<Node>) this.node.getNodes(SLA_CHECKS);

        return Lists.newArrayList(Iterators.transform(itr, (checkNode) -> {
            return JcrUtil.createJcrObject(checkNode, JcrServiceLevelAgreementCheck.class);
        }));
    } catch (RepositoryException e) {
        throw new MetadataRepositoryException("Failed to retrieve the obligation nodes", e);
    }

}

From source file:org.locationtech.geogig.remote.http.BinaryPackedObjects.java

private ImmutableList<ObjectId> reachableContentIds(ImmutableList<ObjectId> needsPrevisit,
        Deduplicator deduplicator) {/*from   w ww. j a v  a2s  .c  o m*/

    Function<RevObject, ObjectId> getIdTransformer = (obj) -> obj == null ? null : obj.getId();

    Iterator<ObjectId> reachable = Iterators.transform( //
            PostOrderIterator.contentsOf(needsPrevisit, database, deduplicator), //
            getIdTransformer);
    return ImmutableList.copyOf(reachable);
}

From source file:qdg.view.MixedGraphAsBiDiGraph.java

@Override
public Iterator<Edge> getInArcIterator(Node node) {
    Iterator<Edge> forwardArcs = Iterators.transform(g.getInArcIterator(node), forwardEdge);
    Iterator<Edge> backwardArcs = Iterators.transform(g.getOutArcIterator(node), backwardEdge);
    Iterator<Edge> uEdges = new InArcIterator(node);
    return Iterators.concat(forwardArcs, backwardArcs, uEdges);
}

From source file:qdg.view.MixedGraphAsDiGraph.java

@Override
public Iterator<Edge> getIncidentArcIterator(Node node) {
    Iterator<Edge> arcs = Iterators.transform(g.getIncidentArcIterator(node), forwardEdge);
    Iterator<Edge> forwardUEdges = Iterators.transform(g.getIncidentEdgeIterator(node), forwardEdge);
    Iterator<Edge> backwardUEdges = Iterators.transform(g.getIncidentUEdgeIterator(node), backwardEdge);
    return Iterators.concat(arcs, forwardUEdges, backwardUEdges);
}

From source file:org.richfaces.component.behavior.ClientValidatorImpl.java

@Override
public void broadcast(BehaviorEvent event) throws AbortProcessingException {
    // Add message components to re-render list ( if any )
    FacesContext facesContext = FacesContext.getCurrentInstance();
    PartialViewContext partialViewContext = facesContext.getPartialViewContext();
    if (partialViewContext.isAjaxRequest()) {
        UIComponent component = event.getComponent();
        if (component instanceof EditableValueHolder) {
            String clientId = component.getClientId(facesContext);
            final ImmutableList<Message> messages = ImmutableList
                    .copyOf(Iterators.transform(facesContext.getMessages(clientId), MESSAGES_TRANSFORMER));

            JavaScriptService javaScriptService = ServiceTracker.getService(JavaScriptService.class);
            javaScriptService.addPageReadyScript(facesContext, new MessageUpdateScript(clientId, messages));

            if (messages.isEmpty()) {
                final String onvalid = getOnvalid();
                if (onvalid != null && !"".equals(onvalid.trim())) {
                    javaScriptService.addPageReadyScript(facesContext,
                            new AnonymousFunctionCall().addToBody(onvalid));
                }//from  w  ww .  j  a  v  a2 s .  c o  m
            } else {
                final String oninvalid = getOninvalid();
                if (oninvalid != null && !"".equals(oninvalid.trim())) {
                    javaScriptService.addPageReadyScript(facesContext, new AnonymousFunctionCall("messages")
                            .addParameterValue(ScriptUtils.toScript(messages)).addToBody(oninvalid));
                }
            }
        }
    }
    super.broadcast(event);
}

From source file:org.gpfvic.mahout.cf.taste.impl.model.GenericItemPreferenceArray.java

@Override
public Iterator<Preference> iterator() {
    return Iterators.transform(new CountingIterator(length()), new Function<Integer, Preference>() {
        @Override/*  ww  w  . ja va 2 s . co m*/
        public Preference apply(Integer from) {
            return new PreferenceView(from);
        }
    });
}

From source file:org.apache.fluo.recipes.core.map.CollisionFreeMap.java

/**
 * This method will retrieve the current value for key and any outstanding updates and combine
 * them using the configured {@link Combiner}. The result from the combiner is returned.
 *///from  w w w  . j av  a 2  s . c  o m
public V get(SnapshotBase tx, K key) {

    byte[] k = serializer.serialize(key);

    int hash = Hashing.murmur3_32().hashBytes(k).asInt();
    String bucketId = genBucketId(Math.abs(hash % numBuckets), numBuckets);

    BytesBuilder rowBuilder = Bytes.builder();
    rowBuilder.append(updatePrefix).append(bucketId).append(':').append(k);

    Iterator<RowColumnValue> iter = tx.scanner().over(Span.prefix(rowBuilder.toBytes())).build().iterator();

    Iterator<V> ui;

    if (iter.hasNext()) {
        ui = Iterators.transform(iter, rcv -> deserVal(rcv.getValue()));
    } else {
        ui = Collections.<V>emptyList().iterator();
    }

    rowBuilder.setLength(0);
    rowBuilder.append(dataPrefix).append(bucketId).append(':').append(k);

    Bytes dataRow = rowBuilder.toBytes();

    Bytes cv = tx.get(dataRow, DATA_COLUMN);

    if (!ui.hasNext()) {
        if (cv == null) {
            return null;
        } else {
            return deserVal(cv);
        }
    }

    return combiner.combine(key, concat(ui, cv)).orElse(null);
}