Example usage for com.google.common.base Optional isPresent

Introduction

In this page you can find the example usage for com.google.common.base Optional isPresent.

Prototype

public abstract boolean isPresent();

Source Link

Document

Returns true if this holder contains a (non-null) instance.

Usage

From source file:de.azapps.tools.OptionalUtils.java

@Nullable
public static <F, V> V transformOrNull(@NonNull final Optional<F> optional,
        @NonNull final Function<F, V> transformation) {
    if (optional.isPresent()) {
        return transformation.apply(optional.get());
    } else {/* ww  w.  jav  a  2  s .  com*/
        return null;
    }
}

From source file:com.android.camera.one.OneCameraModule.java

/**
 * Creates a new hardware manager that is based on Camera2 API, if available.
 *
 * @throws OneCameraException Thrown if an error occurred while trying to
 *             access the camera which may occur when accessing the legacy
 *             hardware manager.//from   www.  j ava2  s  . c om
 */
public static OneCameraManager provideOneCameraManager() throws OneCameraException {
    Optional<Camera2OneCameraManagerImpl> camera2HwManager = Camera2OneCameraManagerImpl.create();
    if (camera2HwManager.isPresent()) {
        return camera2HwManager.get();
    }

    Optional<LegacyOneCameraManagerImpl> legacyHwManager = LegacyOneCameraManagerImpl.instance();
    if (legacyHwManager.isPresent()) {
        return legacyHwManager.get();
    }

    throw new OneCameraException("No hardware manager is available.");
}

From source file:de.Keyle.MyPet.api.entity.PropertyConverter.java

@Deprecated
@Since("24.11.2016")
public static TagCompound convertEntity(LivingEntity entity) {
    Optional<EntityConverterService> converter = MyPetApi.getServiceManager()
            .getService(EntityConverterService.class);
    if (converter.isPresent()) {
        return converter.get().convertEntity(entity);
    }//from  w  ww .j a  va  2  s  .  c o m

    return new TagCompound();
}

From source file:org.sonar.server.ws.WsUtils.java

/**
 * @throws NotFoundException if the value is not present
 * @return the value//  w w w. j  a va2  s.c o  m
 */
public static <T> T checkFoundWithOptional(Optional<T> value, String message, Object... messageArguments) {
    if (!value.isPresent()) {
        throw new NotFoundException(format(message, messageArguments));
    }

    return value.get();
}

From source file:org.geogit.rest.repository.GeogitResourceUtils.java

public static Optional<GeoGIT> getGeogit(Request request) {
    Optional<String> repositoryName = getRepositoryName(request);
    if (!repositoryName.isPresent()) {
        return Optional.absent();
    }//  w  w  w .  j a  v a2s.  c  o m
    Optional<GeoGitDataStore> dataStore = findDataStore(request, repositoryName.get());
    if (!dataStore.isPresent()) {
        return Optional.absent();
    }
    return Optional.of(dataStore.get().getGeogit());
}

From source file:org.sonar.server.computation.task.projectanalysis.measure.MeasureDtoToMeasure.java

private static Optional<Measure> toLevelMeasure(MeasureDto measureDto, @Nullable String data) {
    if (data == null) {
        return toNoValueMeasure(measureDto);
    }// w  w  w . j  a  va 2s . co  m
    Optional<Measure.Level> level = toLevel(data);
    if (!level.isPresent()) {
        return toNoValueMeasure(measureDto);
    }
    return of(setCommonProperties(Measure.newMeasureBuilder(), measureDto).create(level.get()));
}

From source file:org.eclipse.buildship.core.workspace.internal.EclipseVmUtil.java

private static IVMInstall findOrRegisterVM(String version, File location) {
    Optional<IVMInstall> vm = findRegisteredVM(version);
    return vm.isPresent() ? vm.get() : registerNewVM("Java SE " + version, location);
}

From source file:de.flapdoodle.java2pandoc.parser.BlockToTypedBlockConverter.java

@Nonnull
@VisibleForTesting//from ww w. j a v a  2s .com
protected static Optional<Block> unpackComment(Block block) {
    Optional<Block> blockWithLineCommentStripped = removePattern(block, LINE_COMMENT_PATTERN);
    if (blockWithLineCommentStripped.isPresent()) {
        return blockWithLineCommentStripped;
    }
    return removePattern(block, BLOCK_COMMENT_PATTERN);
}

From source file:eu.numberfour.n4js.ui.utils.HandlerServiceUtils.java

private static <T> Optional<T> getVariable(final String variableName, final Class<T> expectedClass) {

    if (isNullOrEmpty(variableName) || null == expectedClass) {
        return absent();
    }/* ww w  .  ja v  a 2 s.  c  o  m*/

    final Optional<IEvaluationContext> state = getCurrentWorkbenchState();
    if (!state.isPresent()) {
        return absent();
    }

    final Object variable = state.get().getVariable(variableName);
    if (null == variable || UNDEFINED_VARIABLE == variable) {
        return absent();
    }

    if (expectedClass.isAssignableFrom(variable.getClass())) {
        return fromNullable(expectedClass.cast(variable));
    }

    return absent();
}

From source file:com.thatjoemoore.utils.annotations.ElementsExt.java

public static PackageElement getFirstAnnotatedPackage(TypeElement element,
        Class<? extends Annotation> annotationClass, Elements elements) {
    for (PackageElement each : getPackages(element, elements)) {
        Optional<AnnotationMirror> mirror = MoreElements.getAnnotationMirror(each, annotationClass);
        if (mirror.isPresent()) {
            return each;
        }//w  ww. j a  v a  2s.  c o m
    }
    return null;
}