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:com.eucalyptus.auth.util.Identifiers.java

private static String getRegionAccountNumberPartition() {
    return Iterables.getFirst(Partition.supplier.getAccountNumberPartitions(), "000");
}

From source file:com.ngdata.hbaseindexer.phoenix.AbstractUniqueKeyFormatter.java

@Override
public final String formatRow(byte[] row) {
    Object formatted = Iterables.getFirst(byteArrayValueMapper.map(row), null);
    if (formatted == null) {
        throw new IllegalStateException("Formatted row was null from " + Arrays.toString(row));
    }/*  w  w w . j  ava2 s .  c o  m*/
    return String.valueOf(formatted);
}

From source file:net.caseif.ttt.util.helper.platform.BungeeHelper.java

public static void initialize() {
    checkState(!startedInitializing, "BungeeHelper initialization cannot be called more than once");
    startedInitializing = true;//ww w.ja  v a 2 s  .c  o  m

    if (TTTCore.config.get(ConfigKey.RETURN_SERVER).isEmpty()) {
        return;
    }

    registerBungeeChannel();
    sendPluginMessage("GetServers", null, Iterables.getFirst(Bukkit.getOnlinePlayers(), null));
}

From source file:org.apache.metron.indexing.dao.IndexDaoFactory.java

public static IndexDao combine(Iterable<IndexDao> daos, Function<IndexDao, IndexDao> daoTransformation)
        throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException,
        InstantiationException {/* www . j  ava2  s. co m*/
    int numDaos = Iterables.size(daos);
    if (numDaos == 0) {
        throw new IllegalArgumentException(
                "Trying to combine 0 dao's into a DAO is not a supported configuration.");
    }
    if (numDaos == 1) {
        return daoTransformation.apply(Iterables.getFirst(daos, null));
    }
    return new MultiIndexDao(daos, daoTransformation);
}

From source file:uk.gov.gchq.koryphe.impl.function.FirstItem.java

@Override
@SuppressFBWarnings(value = "DE_MIGHT_IGNORE", justification = "Any exceptions are to be ignored")
public T apply(final Iterable<T> input) {
    if (null == input) {
        throw new IllegalArgumentException("Input cannot be null");
    }/*from  w  ww . j  a  va 2s.  c  o  m*/
    try {
        return Iterables.getFirst(input, null);
    } finally {
        CloseableUtil.close(input);
    }
}

From source file:com.vilt.minium.impl.FrozenWindowWebElementsImpl.java

@Override
public Iterable<WebElementsDriver<T>> candidateWebDrivers() {
    if (frozenWebElementsDriver == null) {
        WebElementsDriver<T> driver = null;
        Iterable<WebElementsDriver<T>> candidateHandles = super.candidateWebDrivers();
        int size = size(candidateHandles);
        if (size == 1) {
            driver = Iterables.getFirst(candidateHandles, null);
        } else if (size > 1) {
            throw new WebElementsException("Cannot freeze window because more than one window matched");
        }/* w ww . j av  a 2s. co m*/

        if (driver != null) {
            frozenWebElementsDriver = new WindowWebElementsDriver<T>(rootWebDriver(), factory,
                    driver.getWindowHandle());
        }
    }

    if (frozenWebElementsDriver == null) {
        return Collections.emptyList();
    }

    return Collections.singletonList(frozenWebElementsDriver);
}

From source file:com.android.tools.idea.wizard.LegacyPathWrapper.java

static Iterable<ModuleTemplate> getModuleTemplates(@NotNull WizardPath wizardPath) {
    Collection<ChooseTemplateStep.MetadataListItem> templates = wizardPath.getBuiltInTemplates();
    if (wizardPath instanceof ImportSourceModulePath) {
        ChooseTemplateStep.MetadataListItem template = Iterables.getFirst(templates, null);
        assert template != null;
        LegacyModuleTemplate importEclipse = new LegacyModuleTemplate(template, "Import Eclipse ADT Project",
                "Import an existing Eclipse ADT project as a module",
                AndroidIcons.ModuleTemplates.EclipseModule);
        LegacyModuleTemplate importGradle = new LegacyModuleTemplate(template, "Import Gradle Project",
                "Import an existing Gradle project as a module", AndroidIcons.ModuleTemplates.GradleModule);
        return ImmutableList.<ModuleTemplate>of(importGradle, importEclipse);
    } else if (wizardPath instanceof WrapArchiveWizardPath) {
        ChooseTemplateStep.MetadataListItem template = Iterables.getFirst(templates, null);
        assert template != null;
        return Collections.<ModuleTemplate>singleton(new LegacyModuleTemplate(template,
                "Import .JAR/.AAR Package", "Import an existing JAR or AAR package as a new project module",
                AndroidIcons.ModuleTemplates.Android));
    } else {/*from   w w  w.  j a  va 2s  .  co m*/
        ImmutableList.Builder<ModuleTemplate> templatesBuilder = ImmutableList.builder();
        for (ChooseTemplateStep.MetadataListItem template : templates) {
            templatesBuilder.add(new LegacyModuleTemplate(template, null));
        }
        return templatesBuilder.build();
    }
}

From source file:org.apache.metron.performance.sampler.BiasedSampler.java

public static List<Map.Entry<Integer, Integer>> readDistribution(BufferedReader distrFile, boolean quiet)
        throws IOException {
    List<Map.Entry<Integer, Integer>> ret = new ArrayList<>();
    if (!quiet) {
        System.out.println("Using biased sampler with the following biases:");
    }/*ww w.jav  a  2  s .  com*/
    int sumLeft = 0;
    int sumRight = 0;
    for (String line = null; (line = distrFile.readLine()) != null;) {
        if (line.startsWith("#")) {
            continue;
        }
        Iterable<String> it = Splitter.on(",").split(line.trim());
        if (Iterables.size(it) != 2) {
            throw new IllegalArgumentException(
                    line + " should be a comma separated pair of integers, but was not.");
        }
        int left = Integer.parseInt(Iterables.getFirst(it, null));
        int right = Integer.parseInt(Iterables.getLast(it, null));
        if (left <= 0 || left > 100) {
            throw new IllegalArgumentException(
                    line + ": " + (left < 0 ? left : right) + " must a positive integer in (0, 100]");
        }
        if (right <= 0 || right > 100) {
            throw new IllegalArgumentException(line + ": " + right + " must a positive integer in (0, 100]");
        }
        if (!quiet) {
            System.out.println(
                    "\t" + left + "% of templates will comprise roughly " + right + "% of sample output");
        }
        ret.add(new AbstractMap.SimpleEntry<>(left, right));
        sumLeft += left;
        sumRight += right;
    }
    if (sumLeft > 100 || sumRight > 100) {
        throw new IllegalStateException(
                "Neither columns must sum to beyond 100.  " + "The first column is the % of templates. "
                        + "The second column is the % of the sample that % of template occupies.");
    } else if (sumLeft < 100 && sumRight < 100) {
        int left = 100 - sumLeft;
        int right = 100 - sumRight;
        if (!quiet) {
            System.out.println(
                    "\t" + left + "% of templates will comprise roughly " + right + "% of sample output");
        }
        ret.add(new AbstractMap.SimpleEntry<>(left, right));
    }
    return ret;

}

From source file:com.slimgears.slimapt.AnnotationProcessingTestBase.java

protected void testAnnotationProcessing(Iterable<AbstractProcessor> processor, Iterable<JavaFileObject> inputs,
        Iterable<JavaFileObject> expectedOutputs) {
    assert_().about(javaSources()).that(inputs).processedWith(processor).compilesWithoutError().and()
            .generatesSources(Iterables.getFirst(expectedOutputs, null),
                    toArray(skip(expectedOutputs, 1), JavaFileObject.class));
}

From source file:com.eucalyptus.auth.util.Identifiers.java

private static String getRegionIdentifierPartition() {
    return Iterables.getFirst(Partition.supplier.getIdentifierPartitions(), "AA");
}