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.geogig.osm.internal.log.ReadOSMMapping.java

@Override
protected Optional<Mapping> _call() {
    Preconditions.checkNotNull(entry);//from w  w w .  j a  va2  s  .c  o m
    BlobStore blobStore = context().blobStore();
    final String pathPrefix = "osm/map/";
    final String path = pathPrefix + entry.getPostMappingId();
    Optional<String> blob = Blobs.getBlobAsString(blobStore, path);
    Mapping mapping = null;
    if (blob.isPresent()) {
        mapping = Mapping.fromString(blob.get());
    }
    return Optional.fromNullable(mapping);
}

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

/**
 * @return the header
 */
public Optional<ExtendedSignedBlock> getBlock() {
    return Optional.fromNullable(block);
}

From source file:org.gerryai.planning.model.ConstantDefinition.java

/**
 * Constructor.//from w  ww.  j av  a2  s  .  c o  m
 * @param name the constant's name.
 * @param type the constant's type.
 */
public ConstantDefinition(final String name, final Type type) {
    this.name = name;
    this.type = Optional.fromNullable(type);
}

From source file:me.lazerka.gae.jersey.oauth2.facebook.FacebookUserPrincipal.java

public Optional<FacebookUser> getFacebookUser() {
    return Optional.fromNullable(facebookUser);
}

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

public Optional<T> findByName(String name, ProjectEntity parent) {
    T result = uniqueResult(/*from ww w .  j  a  va 2  s  .c om*/
            namedQuery(findByName).setString("name", name).setString("projectId", parent.getId()));
    return Optional.fromNullable(result);
}

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

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

From source file:com.aegiswallet.widgets.AegisTypeface.java

public static Optional<Typeface> createTypeface(TextView widget, Optional<Font> option) {
    if (widget.isInEditMode()) {
        return Optional.absent();
    }/* www. j av a 2  s . c  om*/
    synchronized (TYPEFACES) {
        Font font = option.or(Font.regular);
        Typeface typeface = TYPEFACES.get(font);
        if (typeface == null) {
            typeface = Typeface.createFromAsset(widget.getContext().getAssets(), getAssetPath(font));
            TYPEFACES.put(font, typeface);
        }
        // This is never null at runtime, but roboelectric cannot create typefaces so it is null during tests
        return Optional.fromNullable(typeface);
    }
}

From source file:org.sonar.server.computation.qualityprofile.ActiveRulesHolderImpl.java

@Override
public Optional<ActiveRule> get(RuleKey ruleKey) {
    checkState(activeRulesByKey != null, "Active rules have not been initialized yet");
    return Optional.fromNullable(activeRulesByKey.get(ruleKey));
}

From source file:org.apache.provisionr.api.util.WithOptions.java

public String getOptionOr(String key, String value) {
    return Optional.fromNullable(getOption(key)).or(value);
}

From source file:org.opendaylight.yangtools.yang.parser.repo.RevisionDependencyResolver.java

@Override
protected boolean isKnown(final Collection<SourceIdentifier> haystack, final ModuleImport mi) {
    final String rev = mi.getRevision() != null ? QName.formattedRevision(mi.getRevision()) : null;
    final SourceIdentifier msi = SourceIdentifier.create(mi.getModuleName(), Optional.fromNullable(rev));

    // Quick lookup
    if (haystack.contains(msi)) {
        return true;
    }/*ww w.j a  v a2 s . c  o m*/

    // Slow revision-less walk
    return rev == null && findWildcard(haystack, mi.getModuleName()) != null;
}