Example usage for com.google.common.collect Iterables getFirst

Introduction

In this page you can find the example usage for com.google.common.collect Iterables getFirst.

Prototype

@Nullable
public static <T> T getFirst(Iterable<? extends T> iterable, @Nullable T defaultValue)

Source Link

Document

Returns the first element in iterable or defaultValue if the iterable is empty.

Usage

From source file:org.apache.metron.common.field.transformation.SimpleFieldTransformation.java

@Override
public Map<String, Object> map(Map<String, Object> input, List<String> outputField,
        LinkedHashMap<String, Object> fieldMappingConfig, Map<String, Object> sensorConfig, Context context) {
    Object value = (input == null) ? null : Iterables.getFirst(input.values(), null);
    return map(value, outputField.get(0));
}

From source file:com.facebook.buck.artifact_cache.DummyArtifactCache.java

@Override
public ListenableFuture<Void> store(ArtifactInfo info, BorrowablePath output) {
    storeKey = Iterables.getFirst(info.getRuleKeys(), null);
    return Futures.immediateFuture(null);
}

From source file:org.apache.druid.server.router.TimeBoundaryTieredBrokerSelectorStrategy.java

@Override
public Optional<String> getBrokerServiceName(TieredBrokerConfig tierConfig, Query query) {
    // Somewhat janky way of always selecting highest priority broker for this type of query
    if (query instanceof TimeBoundaryQuery) {
        return Optional.of(Iterables.getFirst(tierConfig.getTierToBrokerMap().values(),
                tierConfig.getDefaultBrokerServiceName()));
    }//from  www  .java2 s  .co  m

    return Optional.absent();
}

From source file:nextmethod.web.razor.utils.MiscUtils.java

public static String createTestFilePath(final String... parts) {
    final List<String> pathParts = Lists.newArrayList(parts);
    final FileSystem fileSystem = FileSystems.getDefault();
    String first = pathAsString(Iterables.getFirst(fileSystem.getRootDirectories(), null));
    if (first != null && !first.startsWith(fileSystem.getSeparator())) {
        // Strip the last character if it equals the filesystem separator
        if (first.length() > 1 && first.endsWith(fileSystem.getSeparator())) {
            first = first.substring(0, first.length() - 1);
        }// w  ww  .ja  va  2  s. com
        pathParts.add(0, first);
    }
    return Joiner.on(fileSystem.getSeparator()).join(pathParts);
}

From source file:org.apache.brooklyn.entity.software.base.VanillaWindowsProcessImpl.java

@Override
protected void preStart() {
    super.preStart();
    sensors().set(RDP_PORT, 3389);//ww w .j a va 2s. co  m
    sensors().set(RDP_PORT_CAMEL_CASE, 3389);

    WinRmMachineLocation loc = Iterables.getFirst(Iterables.filter(getLocations(), WinRmMachineLocation.class),
            null);
    if (loc != null) {
        sensors().set(WINRM_PORT, loc.getPort());
        sensors().set(WINRM_PORT_SHORTEN, loc.getPort());
        sensors().set(WINRM_PORT_CAMEL_CASE, loc.getPort());
    }
}

From source file:kihira.foxlib.common.EnumHeadType.java

private static GameProfile refreshGameProfile(GameProfile profile) {
    if (profile != null && !StringUtils.isNullOrEmpty(profile.getName())) {
        if (!profile.isComplete() || !profile.getProperties().containsKey("textures")) {
            //This would always need to get textures as textures aren't saved client side
            GameProfile gameprofile = MinecraftServer.getServer().func_152358_ax()
                    .func_152655_a(profile.getName());
            if (gameprofile != null) {
                Property property = (Property) Iterables.getFirst(gameprofile.getProperties().get("textures"),
                        (Object) null);
                if (property == null)
                    gameprofile = MinecraftServer.getServer().func_147130_as()
                            .fillProfileProperties(gameprofile, true);

                profile = gameprofile;/*from w  w  w  .  j  a v a 2 s  .  c om*/
            }
        }
    }
    return profile;
}

From source file:org.eclipse.xtext.xbase.ui.builder.EclipseGeneratorConfigProvider.java

@Override
public GeneratorConfig get(EObject context) {
    GeneratorConfig result = new GeneratorConfig();
    IProject project = null;//from   w  w w. ja  v a  2  s .  com
    if (context.eResource() != null) {
        Pair<IStorage, IProject> pair = Iterables
                .getFirst(storage2UriMapper.getStorages(context.eResource().getURI()), null);
        if (pair != null) {
            project = pair.getSecond();
        }
    }
    xbaseBuilderPreferenceAccess.loadBuilderPreferences(result, project);
    return result;
}

From source file:org.zalando.github.spring.pagination.LinkRelationExtractor.java

public Optional<LinkRelation> extractLinkRelation(String linkHeaderValue, String relation) {
    Iterable<String> splittedHeaderIterable = splitter.split(linkHeaderValue);
    Iterable<LinkRelation> linkRelations = Iterables.transform(splittedHeaderIterable, transformer);
    linkRelations = Iterables.filter(linkRelations, new RelationsPredicate(relation));
    return Optional.fromNullable(Iterables.getFirst(linkRelations, null));
}

From source file:com.davidbracewell.wordnet.SynsetPathWalker.java

@Override
public Synset next() {
    Synset toReturn = synset;/*from w w w. j a  v a 2  s  .co m*/
    seen.add(toReturn.toString());
    synset = Iterables.getFirst(Iterables.concat(synset.getRelatedSynsets(Relation.HYPERNYM),
            synset.getRelatedSynsets(Relation.HYPERNYM_INSTANCE)), null);
    if (synset != null && seen.contains(synset.toString())) {
        synset = null;
    }
    return toReturn;
}

From source file:minium.web.internal.actions.AbstractWebInteraction.java

/**
 * Gets the first element.//from   w  w  w .j av  a  2 s  . c o  m
 *
 * @param elems the elems
 * @return the first element
 */
protected WebElement getFirstElement(Elements elems) {
    return Iterables.getFirst(elems.as(InternalWebElements.class).wrappedNativeElements(), null);
}