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

Introduction

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

Prototype

public static <T> Optional<T> absent()

Source Link

Document

Returns an Optional instance with no contained reference.

Usage

From source file:com.opennms.lucidity.Util.java

/**
 * Return a class's no-argument constructor, or {@link Optional#absent()} no such constructor
 * exists./*from  www  . jav  a  2s.com*/
 *
 * @param cls
 *            the Class
 * @return Optional no-argument constructor
 */
static <T> Optional<Constructor<T>> getNoArgConstructor(Class<T> cls) {
    Constructor<T> ctor;
    try {
        ctor = cls.getDeclaredConstructor();
    } catch (NoSuchMethodException | SecurityException e) {
        return Optional.absent();
    }
    return Optional.of(ctor);
}

From source file:org.opendaylight.controller.config.util.capability.BasicCapability.java

@Override
public Optional<String> getCapabilitySchema() {
    return Optional.absent();
}

From source file:springfox.bean.validators.plugins.BeanValidators.java

public static <T extends Annotation> Optional<T> validatorFromField(ModelPropertyContext context,
        Class<T> annotationType) {

    Optional<AnnotatedElement> annotatedElement = context.getAnnotatedElement();
    Optional<T> notNull = Optional.absent();
    if (annotatedElement.isPresent()) {
        notNull = Optional.fromNullable(annotatedElement.get().getAnnotation(annotationType));
    }//from  w  ww.j  av  a  2  s. com
    return notNull;
}

From source file:com.opower.rest.client.generator.util.StringConverters.java

private static ConcurrentMap<Class<?>, StringConverter<?>> init() {
    ConcurrentMap<Class<?>, StringConverter<?>> map = new MapMaker().makeMap();
    map.putAll(ImmutableMap.<Class<?>, StringConverter<?>>builder()
            .put(Optional.absent().getClass(), new OptionalConverter())
            .put(Optional.of(true).getClass(), new OptionalConverter())
            .put(Cookie.class, new CookieStringConverter()).put(EntityTag.class, new EntityTagDelegate())
            .put(Locale.class, new LocaleDelegate()).put(MediaType.class, new MediaTypeStringConverter())
            .put(URI.class, new UriStringConverter()).put(NewCookie.class, new NewCookieStringConverter())
            .put(CacheControl.class, new CacheControlDelegate()).build());
    return map;//  w w  w.  ja v  a 2s .c  o m
}

From source file:com.epam.ta.reportportal.core.widget.content.GadgetTypes.java

public static Optional<GadgetTypes> findByName(@Nullable String name) {
    if (null == name) {
        return Optional.absent();
    }/*w w w  .j a v  a 2  s. c  om*/
    for (GadgetTypes gadgetType : GadgetTypes.values()) {
        if (gadgetType.getType().equals(name)) {
            return Optional.of(gadgetType);
        }
    }
    return Optional.absent();
}

From source file:im.dadoo.teak.biz.bo.impl.DefaultUserBO.java

@Override
public Optional<UserPO> insert(String name, String password) {
    UserPO userPO = this.userDAO.findByName(name);
    //????/*w ww .  ja v a2s.c om*/
    if (userPO == null) {
        userPO = new UserPO();
        userPO.setName(name);
        userPO.setPassword(password);
        return Optional.of(this.userDAO.insert(userPO));
    } else {
        return Optional.absent();
    }
}

From source file:io.druid.tasklogs.NoopTaskLogs.java

@Override
public Optional<ByteSource> streamTaskLog(String taskid, long offset) throws IOException {
    return Optional.absent();
}

From source file:fr.javatronic.damapping.intellij.plugin.integration.psiparsing.PsiTypeElementUtil.java

public static Optional<PsiIdentifier> getPsiIdentifier(PsiTypeElement psiTypeElement) {
    PsiJavaCodeReferenceElement referenceElement = psiTypeElement.getInnermostComponentReferenceElement();
    if (referenceElement == null) { // type natif, so very unlkely, will be boxed
        return Optional.absent();
    }//from  w ww . j  av  a 2 s  .  c o m
    return from(Arrays.asList(referenceElement.getChildren())).filter(PsiIdentifier.class).first();
}

From source file:org.opendaylight.controller.netconf.persist.impl.NoOpStorageAdapter.java

@Override
public Optional<ConfigSnapshotHolder> loadLastConfig() throws IOException {
    logger.debug("loadLastConfig called");
    return Optional.absent();
}

From source file:org.onos.yangtools.yang.data.api.schema.NormalizedNodes.java

public static Optional<NormalizedNode<?, ?>> findNode(final YangInstanceIdentifier rootPath,
        final NormalizedNode<?, ?> rootNode, final YangInstanceIdentifier childPath) {
    final Optional<YangInstanceIdentifier> relativePath = childPath.relativeTo(rootPath);
    if (relativePath.isPresent()) {
        return findNode(rootNode, relativePath.get());
    } else {/*from   w  ww . jav  a2 s.  c om*/
        return Optional.absent();
    }
}