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:org.locationtech.geogig.rest.Variants.java

public static Optional<Variant> getVariantByExtension(Request request, List<Variant> supported) {
    String extension = RESTUtils.getStringAttribute(request, "extension");
    Variant v = null;/*from   w w w  .j a  v  a  2  s.c  o m*/
    if ("xml".equals(extension) && supported.contains(XML)) {
        v = XML;
    } else if ("json".equals(extension) && supported.contains(JSON)) {
        v = JSON;
    } else if ("csv".equals(extension) && supported.contains(CSV)) {
        v = CSV;
    }
    return Optional.fromNullable(v);
}

From source file:io.mesosphere.mesos.util.Functions.java

@NotNull
public static <A> Optional<A> headOption(@NotNull final Iterable<A> iterable) {
    final Iterator<A> iter = iterable.iterator();
    if (iter.hasNext()) {
        return Optional.fromNullable(iter.next());
    } else {// w w w.  j a  v  a  2s .  co  m
        return Optional.absent();
    }
}

From source file:org.locationtech.geogig.plumbing.ResolveGeogigDir.java

public static Optional<URL> lookup(final File directory) {
    try {//from w  w  w .  j a  v a 2s  . com
        return Optional.fromNullable(lookupGeogigDirectory(directory));
    } catch (IOException e) {
        throw Throwables.propagate(e);
    }
}

From source file:org.jclouds.reflect.InvocationSuccess.java

public static InvocationSuccess create(Invocation invocation, @Nullable Object result) {
    return new InvocationSuccess(invocation, Optional.fromNullable(result));
}

From source file:ph.devcon.android.category.db.Category.java

public static Category toCategory(CategoryAPI categoryAPI) {
    Category category = null;//from  www .  j a v a2  s  .  c  o  m
    Optional<CategoryAPI> categoryAPIOptional = Optional.fromNullable(categoryAPI);
    if (categoryAPIOptional.isPresent()) {
        String categoryName = categoryAPIOptional.get().getName();
        if (!Util.isNullOrEmpty(categoryName)) {
            category = new Category();
            category.setName(categoryAPIOptional.get().getName());
        }
    }
    return category;
}

From source file:com.googlesource.gerrit.plugins.github.git.GitHubUser.java

private static Optional<String> initLogin(GHUser gitHubUser) {
    return Optional.fromNullable(gitHubUser != null ? gitHubUser.getLogin() : null);
}

From source file:gobblin.compliance.utils.DatasetUtils.java

/**
 * Find {@link HivePartitionDataset} given complete partition name from a list of datasets
 * @param partitionName Complete partition name ie dbName@tableName@partitionName
 *///from www  .jav  a 2s  .co  m
public static Optional<HivePartitionDataset> findDataset(String partitionName,
        List<HivePartitionDataset> datasets) {
    for (HivePartitionDataset dataset : datasets) {
        if (dataset.datasetURN().equalsIgnoreCase(partitionName)) {
            return Optional.fromNullable(dataset);
        }
    }
    log.warn("Unable to find dataset corresponding to " + partitionName);
    return Optional.<HivePartitionDataset>absent();
}

From source file:com.spotify.helios.common.Resolver.java

private static String env(final String name, final String defaultValue) {
    return Optional.fromNullable(getenv(name)).or(defaultValue);
}

From source file:io.macgyver.core.Kernel.java

public static Optional<Throwable> getStartupError() {
    return Optional.fromNullable(startupError);
}

From source file:org.apache.usergrid.persistence.model.entity.EntityMap.java

public static Optional<EntityMap> fromEntity(Optional<Entity> entity) {
    if (entity.isPresent()) {
        EntityMap map = fromEntity(entity.get());
        return Optional.fromNullable(map);
    } else {/*from www . j ava 2 s.  c  o m*/
        return Optional.absent();
    }
}