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:org.immutables.fixture.OptionalCast.java

@SuppressWarnings("CheckReturnValue")
default void use() {
    ImmutableOptionalCast.of(Optional.absent(), Optional.of("String is object"), Optional.<String[]>absent(),
            Optional.absent());/*from w  w  w .  jav  a2 s . c  o m*/
}

From source file:extrabiomes.module.amica.ic2.IC2API.java

IC2API() {
    Class cls;/*from  w  w w .  ja v a  2 s.  c  o m*/
    try {
        cls = Class.forName("ic2.api.crops.Crops");
        ic2CropsInstance = cls.getField("instance").get(null);
        addBiomeBonus = Optional
                .fromNullable(cls.getMethod("addBiomeBonus", BiomeGenBase.class, Integer.TYPE, Integer.TYPE));
    } catch (final Exception e) {
        e.printStackTrace();
        addBiomeBonus = Optional.absent();
    }
}

From source file:org.everit.json.schema.internal.URIFormatValidator.java

@Override
public Optional<String> validate(final String subject) {
    try {/*from   ww  w .  ja v a  2 s.  co  m*/
        new URI(subject);
        return Optional.absent();
    } catch (URISyntaxException | NullPointerException e) {
        return Optional.of(String.format("[%s] is not a valid URI", subject));
    }
}

From source file:springfox.documentation.swagger.readers.parameter.ParameterAnnotationReader.java

private static Optional<Method> interfaceMethod(Class<?> iface, Method method) {
    try {//  www .ja v  a  2 s. c  o  m
        return Optional.of(iface.getMethod(method.getName(), method.getParameterTypes()));
    } catch (NoSuchMethodException ex) {
        return Optional.absent();
    }
}

From source file:org.onos.yangtools.yang.data.impl.schema.tree.AbstractDataTreeCandidateNode.java

private static Optional<NormalizedNode<?, ?>> getChild(
        final NormalizedNodeContainer<?, PathArgument, NormalizedNode<?, ?>> container,
        final PathArgument identifier) {
    if (container != null) {
        return container.getChild(identifier);
    } else {//from  w  w  w.j  a v a 2 s  .c o m
        return Optional.absent();
    }
}

From source file:com.github.rinde.rinsim.core.model.comm.AbstractBuilder.java

AbstractBuilder() {
    deviceReliability = 1d;
    deviceMaxRange = Optional.absent();
}

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

@Override
public Optional<UserPO> signin(String name, String password) {
    UserPO userPO = this.userDAO.findByName(name);
    if (userPO != null && userPO.getPassword().equals(password)) {
        return Optional.of(userPO);
    } else {/*from w  w w. ja v  a  2 s  .co m*/
        return Optional.absent();
    }
}

From source file:com.eucalyptus.util.FUtils.java

/**
 * Flatten a nested optional.//from www  .  ja v a2s .c  o  m
 *
 * @param option The optional to flatten
 * @param <T> The resulting optional type
 * @return The optional
 */
@Nonnull
public static <T> Optional<T> flatten(@Nullable final Optional<? extends Optional<T>> option) {
    if (option != null && option.isPresent()) {
        return option.get();
    }
    return Optional.absent();
}

From source file:com.qcadoo.mes.orders.dates.OrderDates.java

public static Optional<OrderDates> of(final Entity order) {
    if (hasPlannedDatesDefined(order)) {
        return Optional.of(OrderDates.of(order, Optional.<DateTime>absent(), Optional.<DateTime>absent()));
    } else {// w  ww .  j  a v  a 2 s  .  c om
        return Optional.absent();
    }
}

From source file:nl.ipsen3.service.AuthenticationService.java

@Override
public Optional<User> authenticate(BasicCredentials credentials) throws AuthenticationException {
    User user = userDAO.getByEmailAddress(credentials.getUsername());

    if (user != null && user.getPassword().equals(credentials.getPassword())) {
        return Optional.of(user);
    }//from w  ww .  j av a 2s  .com

    return Optional.absent();
}