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:org.fcrepo.kernel.api.utils.iterators.RdfStream.java

/**
 * Constructor that begins the stream with proffered statements.
 *
 * @param statements the statements/*from www  . ja  v a  2 s.c o  m*/
 * @param <T> extends {@link Statement}
 */
@SafeVarargs
public <T extends Statement> RdfStream(final T... statements) {
    this(Iterators.transform(Iterators.forArray(statements), x -> x.asTriple()));
}

From source file:org.apache.fluo.core.log.TracingTransaction.java

private String encRC(Map<Bytes, Map<Column, Bytes>> ret) {
    return Iterators.toString(Iterators.transform(ret.entrySet().iterator(),
            new Function<Entry<Bytes, Map<Column, Bytes>>, String>() {
                @Override/*  w w w .  jav a2  s. co m*/
                public String apply(Entry<Bytes, Map<Column, Bytes>> e) {
                    return enc(e.getKey()) + "=" + encC(e.getValue());
                }
            }));
}

From source file:org.apache.giraph.block_app.framework.block.FilteringBlock.java

@Override
public Iterator<AbstractPiece> iterator() {
    return Iterators.transform(block.iterator(), new Function<AbstractPiece, AbstractPiece>() {
        @Override//from  ww  w.j  ava2 s.c  om
        public AbstractPiece apply(AbstractPiece input) {
            return new FilteringPiece<>(toCallSend, toCallReceive, input);
        }
    });
}

From source file:com.google.devtools.build.lib.rules.android.AarGeneratorBuilder.java

private static String convertRoots(ResourceContainer container, ResourceType resourceType) {
    return Joiner.on("#").join(
            Iterators.transform(container.getRoots(resourceType).iterator(), Functions.toStringFunction()));
}

From source file:org.obm.provisioning.utils.SerializationUtils.java

private static Collection<String> getCurrentTokenTextValues(JsonNode value) {
    Iterator<String> it = Iterators.transform(value.getElements(), new Function<JsonNode, String>() {
        @Override/* www .ja  va  2 s  .c o m*/
        public String apply(JsonNode input) {
            return input.asText();
        }
    });

    Collection<String> textValues = Lists.newArrayList();
    Iterators.addAll(textValues, it);

    return textValues;
}

From source file:org.sosy_lab.cpachecker.core.reachedset.UnmodifiableReachedSetView.java

@Override
public Iterator<AbstractState> iterator() {
    return Iterators.transform(underlying.iterator(), mapStateFunction);
}

From source file:io.crate.metadata.RoutineInfos.java

private Iterator<RoutineInfo> builtInTokenizers() {
    return Iterators.transform(ftResolver.getBuiltInTokenizers().iterator(),
            new Function<String, RoutineInfo>() {
                @Nullable/*ww w.  j av a2  s.c  om*/
                @Override
                public RoutineInfo apply(@Nullable String input) {
                    return new RoutineInfo(input, RoutineType.TOKENIZER.getName());
                }
            });
}

From source file:org.apache.jackrabbit.oak.security.user.AbstractGroupPrincipal.java

@Override
public Enumeration<? extends Principal> members() {
    final Iterator<Authorizable> members;
    try {// w ww .j  a  va2 s . c  om
        members = getMembers();
    } catch (RepositoryException e) {
        // should not occur.
        String msg = "Unable to retrieve Group members: " + e.getMessage();
        log.error(msg);
        throw new IllegalStateException(msg, e);
    }

    Iterator<Principal> principals = Iterators.transform(members, new Function<Authorizable, Principal>() {
        @Override
        public Principal apply(Authorizable authorizable) {
            if (authorizable == null) {
                return null;
            }
            try {
                return authorizable.getPrincipal();
            } catch (RepositoryException e) {
                String msg = "Internal error while retrieving principal: " + e.getMessage();
                log.error(msg);
                throw new IllegalStateException(msg, e);
            }
        }
    });
    return Iterators.asEnumeration(Iterators.filter(principals, Predicates.<Object>notNull()));
}

From source file:org.janusgraph.graphdb.tinkerpop.optimize.JanusGraphPropertiesStep.java

private Iterator<E> convertIterator(Iterable<? extends JanusGraphProperty> iterable) {
    if (getReturnType().forProperties())
        return (Iterator<E>) iterable.iterator();
    assert getReturnType().forValues();
    return (Iterator<E>) Iterators.transform(iterable.iterator(), p -> ((JanusGraphProperty) p).value());
}

From source file:de.zib.gndms.c3resource.C3ResourceReader.java

public Iterator<Site> readXmlSites(final @NotNull String requiredPrefixParam, final @NotNull InputStream in) {
    return Iterators
            .concat(Iterators.transform(validResources(in), new Function<C3GridResource, Iterator<Site>>() {
                public Iterator<Site> apply(@Nullable final C3GridResource resourceParam) {
                    return Iterators.filter(resourceParam.getSite().iterator(), new Predicate<Site>() {
                        public boolean apply(@Nullable final Site siteParam) {
                            final String id = siteParam.getId();
                            return id != null && id.startsWith(requiredPrefixParam);

                        }/*from  w  w w . j  av  a2 s  .  c om*/
                    });
                }
            }));
}