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:qdg.StaticMixedGraph.java

@Override
public Iterator<Edge> getUEdgeIterator() {
    return Iterators.transform(new IndexIterator<EdgeData>(uEdges), constructUEdge);
}

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From source file:org.geogit.remote.BinaryPackedObjects.java

private ImmutableList<ObjectId> reachableContentIds(ImmutableList<ObjectId> needsPrevisit,
        Deduplicator deduplicator) {/*  ww  w .java 2  s  .c o m*/
    Function<RevObject, ObjectId> getIdTransformer = new Function<RevObject, ObjectId>() {
        @Override
        @Nullable
        public ObjectId apply(@Nullable RevObject input) {
            return input == null ? null : input.getId();
        }
    };

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

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From source file:org.fcrepo.kernel.impl.rdf.impl.LdpContainerRdfContext.java

/**
 * Get the member relations assert on the subject by the given node
 * @param container//w ww. ja va  2s.c  om
 * @return
 * @throws RepositoryException
 */
private Iterator<Triple> memberRelations(final FedoraResource container) throws RepositoryException {
    final com.hp.hpl.jena.graph.Node memberRelation;

    if (container.hasProperty(LDP_HAS_MEMBER_RELATION)) {
        final Property property = container.getProperty(LDP_HAS_MEMBER_RELATION);
        memberRelation = createURI(property.getString());
    } else if (container.hasType(LDP_BASIC_CONTAINER)) {
        memberRelation = LDP_MEMBER.asNode();
    } else {
        return emptyIterator();
    }

    final String insertedContainerProperty;

    if (container.hasType(LDP_INDIRECT_CONTAINER)) {
        if (container.hasProperty(LDP_INSERTED_CONTENT_RELATION)) {
            insertedContainerProperty = container.getProperty(LDP_INSERTED_CONTENT_RELATION).getString();
        } else {
            return emptyIterator();
        }
    } else {
        insertedContainerProperty = MEMBER_SUBJECT.getURI();
    }

    final Iterator<FedoraResource> memberNodes = container.getChildren();

    return Iterators.concat(Iterators.transform(memberNodes,
            new FedoraResourceTripleFunction(insertedContainerProperty, memberRelation)));
}

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From source file:org.eclipse.viatra.integration.gmf.GMFModelConnector.java

@Override
protected Collection<EObject> getSelectedEObjects(ISelection selection) {
    if (selection instanceof IStructuredSelection) {
        Iterator<IGraphicalEditPart> selectionIterator = Iterators
                .filter((((IStructuredSelection) selection).iterator()), IGraphicalEditPart.class);
        return Lists.newArrayList(Iterators
                .filter(Iterators.transform(selectionIterator, new Function<IGraphicalEditPart, EObject>() {

                    @Override/*from w w w . java2 s . c  om*/
                    public EObject apply(IGraphicalEditPart input) {
                        return input.resolveSemanticElement();
                    }
                }), Predicates.notNull()));
    } else {
        return super.getSelectedEObjects();
    }
}

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From source file:org.kiji.schema.impl.hbase.HBaseMaterializedKijiResult.java

/** {@inheritDoc} */
@Override// ww  w  . j  a  v a2s .  c  o m
public Iterator<KijiCell<T>> iterator() {
    final List<Iterator<KijiCell<T>>> columnIterators = Lists.newArrayListWithCapacity(mColumnResults.size());

    for (Map.Entry<KijiColumnName, List<KeyValue>> entry : mColumnResults.entrySet()) {
        final Function<KeyValue, KijiCell<T>> decoder = ResultDecoders.getDecoderFunction(entry.getKey(),
                mLayout, mColumnTranslator, mDecoderProvider);

        columnIterators.add(Iterators.transform(entry.getValue().iterator(), decoder));
    }
    return Iterators.concat(columnIterators.iterator());
}

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From source file:com.moz.fiji.schema.impl.hbase.HBaseMaterializedFijiResult.java

/** {@inheritDoc} */
@Override// w ww.  j  av a2 s . c  o m
public Iterator<FijiCell<T>> iterator() {
    final List<Iterator<FijiCell<T>>> columnIterators = Lists.newArrayListWithCapacity(mColumnResults.size());

    for (Map.Entry<FijiColumnName, List<KeyValue>> entry : mColumnResults.entrySet()) {
        final Function<KeyValue, FijiCell<T>> decoder = ResultDecoders.getDecoderFunction(entry.getKey(),
                mLayout, mColumnTranslator, mDecoderProvider);

        columnIterators.add(Iterators.transform(entry.getValue().iterator(), decoder));
    }
    return Iterators.concat(columnIterators.iterator());
}

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From source file:io.crate.analyze.InsertFromSubQueryAnalyzer.java

/**
 * validate that result columns from subquery match explicit insert columns
 * or complete table schema/* ww  w .j av  a2 s  .  c o m*/
 */
private static void validateColumnsAndAddCastsIfNecessary(List<Reference> targetColumns, QuerySpec querySpec) {
    if (targetColumns.size() != querySpec.outputs().size()) {
        Joiner commaJoiner = Joiner.on(", ");
        throw new IllegalArgumentException(String.format(
                "Number of target columns (%s) of insert statement doesn't match number of source columns (%s)",
                commaJoiner.join(Iterables.transform(targetColumns, Reference.TO_COLUMN_NAME)),
                commaJoiner.join(Iterables.transform(querySpec.outputs(), SymbolPrinter.FUNCTION))));
    }

    int failedCastPosition = querySpec
            .castOutputs(Iterators.transform(targetColumns.iterator(), Symbols.TYPES_FUNCTION));
    if (failedCastPosition >= 0) {
        Symbol failedSource = querySpec.outputs().get(failedCastPosition);
        Reference failedTarget = targetColumns.get(failedCastPosition);
        throw new IllegalArgumentException(String.format(Locale.ENGLISH,
                "Type of subquery column %s (%s) does not match is not convertable to the type of table column %s (%s)",
                failedSource, failedSource.valueType(), failedTarget.ident().columnIdent().fqn(),
                failedTarget.valueType()));
    }
}

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From source file:org.eclipse.viatra.integration.graphiti.GraphitiModelConnector.java

@Override
protected Collection<EObject> getSelectedEObjects(ISelection selection) {
    if (selection instanceof IStructuredSelection) {
        //XXX after Graphiti 0.9 GraphitiShapeEditPart would be the related type, but that is not available in 0.8
        Iterator<ContainerShapeEditPart> selectionIterator = Iterators
                .filter((((IStructuredSelection) selection).iterator()), ContainerShapeEditPart.class);
        return Lists.newArrayList(Iterators
                .filter(Iterators.transform(selectionIterator, new Function<ContainerShapeEditPart, EObject>() {

                    @Override/*w w  w . j  a  v  a 2s  .  c  om*/
                    public EObject apply(ContainerShapeEditPart input) {
                        return Graphiti.getLinkService()
                                .getBusinessObjectForLinkedPictogramElement(input.getPictogramElement());
                    }
                }), Predicates.notNull()));
    } else {
        return super.getSelectedEObjects();
    }
}

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From source file:org.locationtech.geogig.plumbing.DeepCopy.java

private void copyTree(final ObjectId treeId, final ObjectStore from, final ObjectStore to,
        final Set<ObjectId> metadataIds) {
    if (to.exists(treeId)) {
        return;//from   w  w  w .  j av  a  2  s.c  o  m
    }
    Supplier<Iterator<NodeRef>> refs = command(LsTreeOp.class).setReference(treeId.toString())
            .setStrategy(Strategy.DEPTHFIRST_ONLY_FEATURES);

    Supplier<Iterator<Node>> nodes = Suppliers.compose(//
            (it) -> Iterators.transform(it, (ref) -> ref.getNode())//
            , refs);

    // move all features, recursively as given by the LsTreeOp strategy
    copyObjects(from, to, nodes, metadataIds);

    // iterator that traverses the tree,all its subtrees, an bucket trees
    Iterator<RevTree> allSubtreesAndBuckets = new AllTrees(treeId, from);

    to.putAll(allSubtreesAndBuckets);
}

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

@Override
public Iterable<Operation<String>> getOperationsWithOutput(String outputInstance) {
    final Collection<XMLService> services = outputIndex.get(outputInstance);
    return new Iterable<Operation<String>>() {
        @Override/*from   w ww  .  j a v  a  2s  .c o m*/
        public Iterator<Operation<String>> iterator() {
            return Iterators.transform(services.iterator(), new Function<XMLService, Operation<String>>() {
                @Override
                public Operation<String> apply(XMLService service) {
                    return getOperation(service.getName() + operationSuffix);
                }
            });
        }
    };
}

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