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:com.arpnetworking.configuration.jackson.BaseJsonNodeSource.java

/**
 * Find the <code>JsonNode</code> if one exists from a specified root node
 * given a sequence of keys to look-up./*from  ww  w .j  av a2s .  c o  m*/
 *
 * @param node The root <code>JsonNode</code>.
 * @param keys The sequence of keys to search for.
 * @return The <code>Optional</code> <code>JsonNode</code> instance.
 */
protected static Optional<JsonNode> getValue(final Optional<JsonNode> node, final String... keys) {
    JsonNode jsonNode = node.orNull();
    for (final String key : keys) {
        if (jsonNode == null) {
            break;
        }
        jsonNode = jsonNode.get(key);
    }
    return Optional.fromNullable(jsonNode);
}

From source file:com.spotify.heroic.aggregation.simple.Average.java

@JsonCreator
public Average(@JsonProperty("sampling") SamplingQuery sampling) {
    super(Optional.fromNullable(sampling).or(SamplingQuery::empty));
}

From source file:com.facebook.buck.rules.ProjectConfigBuilder.java

public ProjectConfigBuilder setSrcRoots(@Nullable ImmutableList<String> srcRoots) {
    arg.srcRoots = Optional.fromNullable(srcRoots);
    return this;
}

From source file:org.zalando.github.spring.pagination.LinkRelationExtractor.java

public Optional<LinkRelation> extractLinkRelation(String linkHeaderValue, String relation) {
    Iterable<String> splittedHeaderIterable = splitter.split(linkHeaderValue);
    Iterable<LinkRelation> linkRelations = Iterables.transform(splittedHeaderIterable, transformer);
    linkRelations = Iterables.filter(linkRelations, new RelationsPredicate(relation));
    return Optional.fromNullable(Iterables.getFirst(linkRelations, null));
}

From source file:de.uniulm.omi.cloudiator.sword.core.domain.builders.LoginCredentialBuilder.java

public LoginCredential build() {
    return new LoginCredentialImpl(this.username, Optional.fromNullable(this.privateKey),
            Optional.fromNullable(this.password));
}

From source file:org.gerryai.planning.model.logic.Variable.java

/**
 * Constructor./*w  w  w.j a  v a2 s  . c o  m*/
 * @param name the name of the variable
 * @param type the type of the variable
 */
public Variable(final String name, final Type type) {
    this.name = name;
    this.type = Optional.fromNullable(type);
}

From source file:org.gerryai.planning.parser.pddl.internal.logic.SymbolStash.java

/**
 * Push a symbol name into the stash.//w  w  w  .  j a v  a2 s  .  c o  m
 * @param name the name of the symbol being built.
 */
public void push(final String name) {
    checkState(!symbol.isPresent(), "Cannot push a symbol if the last one hasn't been collected yet");
    checkNotNull(name);
    symbol = Optional.fromNullable(name);
}

From source file:com.google.devtools.build.lib.rules.cpp.CppModuleMap.java

public CppModuleMap(Artifact artifact, Artifact umbrellaHeader, String name) {
    this.artifact = artifact;
    this.umbrellaHeader = Optional.fromNullable(umbrellaHeader);
    this.name = name;
}

From source file:com.spotify.heroic.aggregation.simple.CountUnique.java

@JsonCreator
public CountUnique(@JsonProperty("sampling") SamplingQuery sampling) {
    super(Optional.fromNullable(sampling).or(SamplingQuery::empty));
}

From source file:com.sleepcamel.bsoneer.processor.domain.ElementResolver.java

@Override
public Optional<TypeElement> visitDeclared(DeclaredType t, Void p) {
    TypeElement asElement = (TypeElement) t.asElement();
    if (asElement.getSuperclass().getKind().equals(TypeKind.NONE)) {
        asElement = null;/*from  w  w  w  . ja v a2s  .c o m*/
    }
    return Optional.fromNullable(asElement);
}