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:gobblin.util.request_allocation.BruteForceAllocator.java

@Override
protected Iterator<T> getJoinIterator(Iterator<? extends Requestor<T>> requestors,
        ConcurrentBoundedPriorityIterable<T> requestIterable) {
    return Iterators.concat(Iterators.transform(requestors, new Function<Requestor<T>, Iterator<T>>() {
        @Nullable/*from  w  ww  .jav  a  2  s . c om*/
        @Override
        public Iterator<T> apply(Requestor<T> input) {
            return input.iterator();
        }
    }));
}

From source file:ch.ethz.inf.vs.hypermedia.client.utils.DFSCrawler.java

public Iterator<B> process(B item, Set<Object> visited) {
    if (isPostOrder()) {
        Iterator<B> children = Iterators
                .concat(Iterators.transform(internalGetChildren(item, visited), (x) -> process(x, visited)));
        return Iterators.concat(children, Iterators.singletonIterator(item));
    } else {/*from w  ww. ja  v  a 2 s  .c om*/
        Iterator<B> children = Iterators.concat(
                Iterators.transform(internalGetChildren(item, visited), (item1) -> process(item1, visited)));
        return Iterators.concat(Iterators.singletonIterator(item), children);
    }
}

From source file:com.palantir.giraffe.ssh.internal.SshDirectoryStream.java

@Override
protected Iterator<Path> entryIterator() {
    return Iterators.transform(entryIterator, new Function<RemoteResourceInfo, Path>() {
        @Override/*from  w  ww.ja v a  2s .co m*/
        public Path apply(RemoteResourceInfo input) {
            return dir.resolve(input.getName());
        }
    });
}

From source file:com.proofpoint.event.collector.combiner.S3ObjectListing.java

@Override
public Iterator<S3ObjectSummary> iterator() {
    Iterator<ObjectListing> objectListings = new AbstractSequentialIterator<ObjectListing>(
            s3Client.listObjects(listObjectsRequest)) {
        @Override//  ww  w . java2 s  . c o m
        protected ObjectListing computeNext(ObjectListing previous) {
            if (!previous.isTruncated()) {
                return null;
            }
            return s3Client.listNextBatchOfObjects(previous);
        }
    };

    return Iterators.concat(
            Iterators.transform(objectListings, new Function<ObjectListing, Iterator<S3ObjectSummary>>() {
                @Override
                public Iterator<S3ObjectSummary> apply(ObjectListing input) {
                    return input.getObjectSummaries().iterator();
                }
            }));
}

From source file:sf.net.experimaestro.manager.plans.Constant.java

@Override
protected Iterator<ReturnValue> _iterator(ScriptContext scriptContext) {
    return Iterators.transform(values.iterator(), input -> new ReturnValue(null, input));
}

From source file:uk.ac.ed.inf.ace.processors.CleanTokens.java

@Override
public ReadWriteableDocument process(ReadWriteableDocument document) {
    @SuppressWarnings("unchecked")
    Iterator<String> tokens = (Iterator<String>) document.getContent();
    document.setContent(Iterators.filter(Iterators.transform(tokens, NULL_TO_EMPTY), IS_NOT_EMPTY));
    return document;
}

From source file:org.apache.accumulo.shell.commands.NamespacesCommand.java

@Override
public int execute(final String fullCommand, final CommandLine cl, final Shell shellState)
        throws AccumuloException, AccumuloSecurityException, IOException {
    Map<String, String> namespaces = new TreeMap<String, String>(
            shellState.getConnector().namespaceOperations().namespaceIdMap());

    Iterator<String> it = Iterators.transform(namespaces.entrySet().iterator(), entry -> {
        String name = entry.getKey();
        if (Namespaces.DEFAULT_NAMESPACE.equals(name))
            name = DEFAULT_NAMESPACE_DISPLAY_NAME;
        String id = entry.getValue();
        if (cl.hasOption(namespaceIdOption.getOpt()))
            return String.format(TablesCommand.NAME_AND_ID_FORMAT, name, id);
        else//www . ja v a 2  s.c  o  m
            return name;
    });

    shellState.printLines(it, !cl.hasOption(disablePaginationOpt.getOpt()));
    return 0;
}

From source file:org.commoncrawl.mapred.pipelineV3.domainmeta.linkstats.UniqueIncomingRootDomainCounter.java

@Override
public void reduce(TextBytes key, Iterator<TextBytes> values, OutputCollector<TextBytes, TextBytes> output,
        Reporter reporter) throws IOException {

    HashSet<String> rootDomainList = new HashSet<String>();

    Iterators.addAll(rootDomainList, Iterators.transform(values, new Function<TextBytes, String>() {

        @Override//from  w  ww  .jav a  2  s.  c om
        public String apply(TextBytes arg0) {
            return arg0.toString();
        }

    }));

    JsonObject jsonObject = new JsonObject();
    JsonArray jsonArray = new JsonArray();

    jsonObject.addProperty("domain-count", rootDomainList.size());

    for (String domain : rootDomainList) {
        jsonArray.add(new JsonPrimitive(domain));
    }
    jsonObject.add("domains", jsonArray);

    if (rootDomainList.size() != 0) {
        output.collect(key, new TextBytes(jsonObject.toString()));
    }
}

From source file:org.geogit.di.ObjectDatabasePutInterceptor.java

private Object putAllInterceptor(MethodInvocation invocation) throws Throwable {
    Object[] arguments = invocation.getArguments();

    @SuppressWarnings("unchecked")
    final Iterator<? extends RevObject> objects = (Iterator<? extends RevObject>) arguments[0];

    final Iterator<? extends RevObject> sideEffectIterator;
    final List<RevCommit> addedCommits = Lists.newLinkedList();
    sideEffectIterator = Iterators.transform(objects, new Function<RevObject, RevObject>() {

        @Override/*from   w w w.j a  va 2  s . c  o  m*/
        public RevObject apply(RevObject input) {
            if (input instanceof RevCommit) {
                addedCommits.add((RevCommit) input);
            }
            return input;
        }
    });
    arguments[0] = sideEffectIterator;

    Object result = invocation.proceed();
    if (!addedCommits.isEmpty()) {
        GraphDatabase graphDatabase = graphDb.get();
        for (RevCommit commit : addedCommits) {
            ObjectId commitId = commit.getId();
            ImmutableList<ObjectId> parentIds = commit.getParentIds();
            graphDatabase.put(commitId, parentIds);
        }
    }

    return result;
}

From source file:org.apache.fluo.core.impl.scanner.RowScannerImpl.java

@Override
public Iterator<ColumnScanner> iterator() {
    RowIterator rowiter = new RowIterator(snapshot.iterator());
    return Iterators.transform(rowiter, e -> new ColumnScannerImpl(e, columnConverter));
}