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

Introduction

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

Prototype

public static <T> Optional<T> fromNullable(@Nullable T nullableReference)

Source Link

Document

If nullableReference is non-null, returns an Optional instance containing that reference; otherwise returns Optional#absent .

Usage

From source file:se.sics.sweep.webservice.toolbox.Result.java

public static Result failed(Status status, String reason) {
    return new Result(status, Optional.fromNullable(reason), Optional.absent());
}

From source file:org.apache.gobblin.metrics.InnerTimer.java

InnerTimer(MetricContext context, String name, ContextAwareTimer contextAwareTimer) {
    this.name = name;

    Optional<MetricContext> parentContext = context.getParent();
    if (parentContext.isPresent()) {
        this.parentTimer = Optional.fromNullable(parentContext.get().contextAwareTimer(name));
    } else {//from   ww  w  .ja v  a  2  s  . c  o m
        this.parentTimer = Optional.absent();
    }
    this.timer = new WeakReference<>(contextAwareTimer);
}

From source file:com.vmware.photon.controller.apife.db.dao.ProjectDao.java

public Optional<ProjectEntity> findByName(String name, String parentId) {
    ProjectEntity result = uniqueResult(
            namedQuery(findByName).setString("name", name).setString("tenantId", parentId));
    return Optional.fromNullable(result);
}

From source file:io.crate.sql.tree.FunctionCall.java

public FunctionCall(QualifiedName name, Window window, boolean distinct, List<Expression> arguments) {
    this.name = name;
    this.window = Optional.fromNullable(window);
    this.distinct = distinct;
    this.arguments = arguments;
}

From source file:com.vino.persistence.mongo.MongoPersistor.java

@Override
public Optional<EntityKey> getEntityKey(String key) {
    return Optional.fromNullable(keys.get().findOne(new ObjectId(key)).as(EntityKey.class));
}

From source file:org.spongepowered.api.entity.living.villager.Careers.java

/**
 * Gets the {@link Profession} with the specified name.
 *
 * @param name The name of the profession to return
 * @return The profession with the given name, if available
 *//*from ww  w  .  ja v  a2s .  c om*/
public static Optional<Career> getCareerByName(final String name) {
    checkArgument(name != null, "Cannot have a null profession name!");
    return Optional.fromNullable(null);
}

From source file:org.gerryai.planning.model.domain.Precondition.java

/**
 * Constructor./*  w ww. j a  v a 2 s  .c o  m*/
 * @param precondition the formula describing the precondition
 */
public Precondition(final Formula precondition) {
    this.precondition = Optional.fromNullable(precondition);
}

From source file:iterator.util.Utils.java

/**
 * Concatenates a series of optional elements onto an initial {@link List}.
 *
 * <pre>//from w  w  w .  ja  va 2s  .  com
 * {@code List<Transform> all = concatenate(ifs, selected);}
 * </pre>
 *
 * @param initial the initial {@link List}
 * @param optional a series of optional elements that may be null
 * @return a new {@link List} including the non-null optional elements
 * @see Iterables#concat(Iterable)
 * @see Optional#asSet()
 */
@SafeVarargs
public static <T> List<T> concatenate(List<T> initial, T... optional) {
    List<Set<T>> extra = Lists.newArrayList();
    for (T nullable : optional) {
        extra.add(Optional.fromNullable(nullable).asSet());
    }
    Iterable<T> joined = Iterables.concat(initial, Iterables.concat(extra));
    return Lists.newArrayList(joined);
}

From source file:eu.bittrade.libs.steemj.plugins.apis.chain.models.PushTransactionReturn.java

/**
 * @return the error
 */
public Optional<String> getError() {
    return Optional.fromNullable(error);
}

From source file:com.vmware.photon.controller.apife.db.dao.ExtendedAbstractDao.java

public Optional<T> findByName(String name) {
    T result = uniqueResult(namedQuery(findByName).setString("name", name));
    return Optional.fromNullable(result);
}