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.dswarm.graph.batch.rdf.pnx.utils.NodeTypeUtils.java

public static Optional<NodeType> getNodeType(final Optional<Node> optionalNode,
        final Optional<Boolean> optionalIsType) {

    if (!optionalNode.isPresent()) {

        return Optional.absent();
    }/*from  ww w.  ja v  a2 s. co  m*/

    final NodeType nodeType;
    final Node node = optionalNode.get();

    if (node instanceof Resource) {

        if (optionalIsType.isPresent()) {

            if (Boolean.FALSE.equals(optionalIsType.get())) {

                nodeType = NodeType.Resource;
            } else {

                nodeType = NodeType.TypeResource;
            }
        } else {

            nodeType = NodeType.Resource;
        }
    } else if (node instanceof BNode) {

        if (optionalIsType.isPresent()) {

            if (Boolean.FALSE.equals(optionalIsType.get())) {

                nodeType = NodeType.BNode;
            } else {

                nodeType = NodeType.TypeBNode;
            }
        } else {

            nodeType = NodeType.BNode;
        }
    } else if (node instanceof Literal) {

        nodeType = NodeType.Literal;
    } else {

        nodeType = null;
    }

    return Optional.fromNullable(nodeType);
}

From source file:com.google.gplus.serializer.util.GooglePlusActivityUtil.java

/**
 * Given a {@link com.google.api.services.plus.model.Person} object and an
 * {@link org.apache.streams.pojo.json.Activity} object, fill out the appropriate details
 *
 * @param item/*from  w w w . ja  va  2  s .c  o m*/
 * @param activity
 * @throws ActivitySerializerException
 */
public static void updateActivity(Person item, Activity activity) throws ActivitySerializerException {
    activity.setActor(buildActor(item));
    activity.setVerb("update");

    activity.setId(formatId(activity.getVerb(), Optional.fromNullable(item.getId()).orNull()));

    activity.setProvider(getProvider());
    activity.setPublished(new DateTime());
}

From source file:eu.bittrade.libs.steemj.plugins.apis.block.models.GetBlockHeaderReturn.java

/**
 * @return the header
 */
public Optional<BlockHeader> getHeader() {
    return Optional.fromNullable(header);
}

From source file:com.preferanser.server.dao.objectify.Ofy.java

public <T> Optional<T> get(Class<T> clazz, long id) {
    Preconditions.checkArgument(id > 0, "Invalid entity id");
    return Optional.fromNullable(load().type(clazz).id(id).now());
}

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

public CopyFromStatement(Table table, Expression path, @Nullable GenericProperties genericProperties) {

    this.table = table;
    this.path = path;
    this.genericProperties = Optional.fromNullable(genericProperties);
}

From source file:com.google.caliper.runner.config.DeviceConfig.java

/** Returns the value of the option with the given key. */
public final Optional<String> option(String key) {
    return Optional.fromNullable(options().get(key));
}

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

/**
 * Constructor./*from  w  w  w .  j  av a 2  s  . c o  m*/
 * @param effect the formula describing the effect
 */
public Effect(final Formula effect) {
    this.effect = Optional.fromNullable(effect);
}

From source file:org.powerbot.game.api.methods.web.ge.trend.Trend.java

/**
 * Gets the {@code Trend} enumeration constant for the trend with
 * the specified name. Note that the specified name must exactly
 * match the name of a enumeration constant, as returned by the
 * {@code getName} method. If no constant could be found for
 * the value, an absent optional instance is returned.
 *
 * @param name the name of the trend to retrieve
 * @return the trend enumeration constant with the specified name;
 *         or an absent optional instance if no such constant exists
 * @throws NullPointerException if the specified name is {@code null}
 *///from   w  w  w.j  a  v a 2 s . c  o m
public static Optional<Trend> fromName(final String name) {
    return Optional.fromNullable(MAP_FROM_NAME.get(name));
}

From source file:org.opendaylight.yangtools.yang.data.impl.schema.nodes.AbstractImmutableDataContainerNode.java

@Override
public final Optional<DataContainerChild<? extends PathArgument, ?>> getChild(final PathArgument child) {
    return Optional.fromNullable(children.get(child));
}

From source file:org.apache.myriad.configuration.MyriadContainerConfiguration.java

public Optional<MyriadDockerConfiguration> getDockerInfo() {
    return Optional.fromNullable(dockerInfo);
}