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:io.crate.sql.tree.FrameBound.java

public FrameBound(Type type, Expression value) {
    this.type = checkNotNull(type, "type is null");
    this.value = Optional.fromNullable(value);
}

From source file:org.eclipse.recommenders.models.dependencies.DependencyInfo.java

public Optional<String> getAttribute(String key) {
    return Optional.fromNullable(attributes.get(key));
}

From source file:org.geogit.osm.internal.log.ReadOSMMappingLogEntry.java

@Override
public Optional<OSMMappingLogEntry> call() {
    final File osmMapFolder = command(ResolveOSMMappingLogFolder.class).call();
    File file = new File(osmMapFolder, path);
    OSMMappingLogEntry entry = null;//www.  ja  v a2s .  co m
    if (file.exists()) {
        try {
            synchronized (file.getCanonicalPath().intern()) {
                String line = Files.readFirstLine(file, Charsets.UTF_8);
                entry = OSMMappingLogEntry.fromString(line);
            }
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }
    }
    return Optional.fromNullable(entry);
}

From source file:org.apache.aurora.scheduler.cron.SanitizedCronJob.java

/**
 * Get the default cron collision policy.
 *
 * @param policy A (possibly null) policy.
 * @return The given policy or a default if the policy was null.
 *///from  ww w  .  j  a  v  a2  s  .c  om
public static CronCollisionPolicy orDefault(@Nullable CronCollisionPolicy policy) {
    return Optional.fromNullable(policy).or(CronCollisionPolicy.KILL_EXISTING);
}

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

public CreateAnalyzer(String ident, @Nullable String extendedAnalyzer, List<AnalyzerElement> elements) {
    this.ident = ident;
    this.extendedAnalyzer = Optional.fromNullable(extendedAnalyzer);
    this.elements = elements;

    this.properties = new GenericProperties();
    for (AnalyzerElement element : elements) {
        if (element instanceof GenericProperty) {
            this.properties.add((GenericProperty) element);
        }/*from w  ww  .j a v a2  s. com*/
    }

}

From source file:org.locationtech.geogig.api.Node.java

public Optional<ObjectId> getMetadataId() {
    return Optional.fromNullable(metadataId);
}

From source file:org.feature4j.FeatureBundle.java

public <T> Optional<T> get(String key, Class<T> valueClass) {
    final Object featureValue = features.get(key);
    if (featureValue == null || !featureValue.getClass().isAssignableFrom(valueClass)) {
        return Optional.absent();
    }/*from   w w w  . j  a  va 2 s .c  o  m*/
    return Optional.fromNullable((T) featureValue);
}

From source file:org.apache.usergrid.persistence.graph.impl.SimpleSearchEdgeType.java

/**
 * The node's id, the prefix of the string, the last value returned
 * @param node The node to search from (required)
 * @param prefix The optional prefix/*from w  w  w  . j  a v  a2  s .c  o  m*/
 * @param last The optional last
 */
public SimpleSearchEdgeType(final Id node, final String prefix, final Optional<String> last) {
    ValidationUtils.verifyIdentity(node);
    this.node = node;
    this.prefix = Optional.fromNullable(prefix);
    this.last = last == null ? Optional.<String>absent() : last;
}

From source file:org.basepom.mojo.propertyhelper.macros.DemoMacro.java

@Override
public Optional<String> getValue(@Nonnull final MacroDefinition macroDefinition,
        @Nonnull final ValueProvider valueProvider, @Nonnull final AbstractPropertyHelperMojo mojo) {
    Preconditions.checkState(mojo != null, "inserted mojo is null!");

    final String type = Objects.firstNonNull(macroDefinition.getProperties().get("type"), "static");
    if ("static".equals(type)) {
        return Optional.of("static-value");
    } else if ("property".equals(type)) {
        return valueProvider.getValue();
    } else {//ww w  .  java2s. co  m
        return Optional.fromNullable(macroDefinition.getProperties().get("value"));
    }
}

From source file:com.replaymod.sponge.recording.ReplayMetaData.java

@SuppressWarnings("unchecked")
public final <T> Optional<T> get(String key) {
    return Optional.fromNullable((T) metaData.get(key));
}