Example usage for com.google.common.base Optional orNull

Introduction

In this page you can find the example usage for com.google.common.base Optional orNull.

Prototype

@Nullable
public abstract T orNull();

Source Link

Document

Returns the contained instance if it is present; null otherwise.

Usage

From source file:org.semanticweb.owlapi.model.OWLOntologyID.java

/**
 * replace an optional with a blank node iri with an absent optional
 * //w  w  w  .ja v  a 2  s .c  o m
 * @param i
 *        Optional to check
 * @return input optional if its iri is not a blank node iri, absent
 *         otherwise
 */
@Nonnull
private static Optional<IRI> opt(Optional<IRI> i) {
    if (NodeID.isAnonymousNodeIRI(i.orNull())) {
        return Optional.absent();
    }
    return i;
}

From source file:org.onos.yangtools.yang.model.util.SchemaNodeUtils.java

public static final SchemaNode getRootOriginalIfPossible(final SchemaNode data) {
    Optional<SchemaNode> previous = Optional.absent();
    Optional<SchemaNode> next = getOriginalIfPossible(data);
    while (next.isPresent()) {
        previous = next;//  w  ww. java  2s  .c  o  m
        next = getOriginalIfPossible(next.get());
    }
    return previous.orNull();
}

From source file:org.opendaylight.yangtools.yang.model.util.SchemaNodeUtils.java

public static SchemaNode getRootOriginalIfPossible(final SchemaNode data) {
    Optional<SchemaNode> previous = Optional.absent();
    Optional<SchemaNode> next = getOriginalIfPossible(data);
    while (next.isPresent()) {
        previous = next;/*from   w w  w .j  av a2s .co m*/
        next = getOriginalIfPossible(next.get());
    }
    return previous.orNull();
}

From source file:com.google.cloud.metrics.MetricsUtils.java

/**
 * Combines event and object type into a single type string.
 *
 * @param eventType type or category of the reporting event.
 * @param objectType optional type of the object this event applies to.
 * @return Combined type string.// w  w w . j av a2 s  .  c  o m
 */
static String buildCombinedType(String eventType, Optional<String> objectType) {
    return Joiner.on("/").skipNulls().join(eventType, objectType.orNull());
}

From source file:org.sonar.server.computation.task.projectanalysis.measure.MeasureAssert.java

public static MeasureAssert assertThat(@Nullable Optional<Measure> actual) {
    return new MeasureAssert(actual == null ? null : actual.orNull());
}

From source file:org.onos.yangtools.yang.model.util.MustDefinitionImpl.java

/**
*
* Creates new Must Definition/* w  w w.  jav a2s.c  o m*/
*
* @param mustStr must string statement, Must not be null.
* @param description Description of condition
* @param reference Reference for condition
* @param errorAppTag error application tag which should be used for error reporting when condition fails
* @param errorMessage message  which should be used for error reporting when condition fails
*/
public static MustDefinitionImpl create(final String mustStr, final Optional<String> description,
        final Optional<String> reference, final Optional<String> errorAppTag,
        final Optional<String> errorMessage) {
    return new MustDefinitionImpl(mustStr, description.orNull(), reference.orNull(), errorAppTag.orNull(),
            errorMessage.orNull());
}

From source file:com.google.cloud.metrics.MetricsUtils.java

/**
 * Creates a virtual page name (relative URL) from an event type, object type and event name.
 *
 * @param eventType type or category of the reporting event.
 * @param objectType optional type of the object this event applies to.
 * @param eventName name of the reporting event.
 * @return Virtual page name constructed for this event.
 *//*from   w w w  . j a  v  a2 s  .c  om*/
static String buildVirtualPageName(String eventType, Optional<String> objectType, String eventName) {
    return Joiner.on("/").skipNulls().join(VIRTUAL_PAGE_PREFIX, eventType, objectType.orNull(), eventName);
}

From source file:com.shufudong.GuavaExample.collect.OptionalExample.java

/**
 * @return//ww  w. j  a  v  a 2 s .  co m
 * @category <p></p>
 * <ol>
 * <li> boolean isPresent()Optional?T?nulltrueTnullfalse</li>
 * <li>T get()Optional?TT???nullOptionalget()IllegalStateException</li>
 * <li>T or(T)Optional?T?Optional?T?T</li>
 * <li>T orNull()Optional??TOptional?null?fromNullable()</li>
 * <li>Set<T> asSet()??SetSet?Optional??TSet?T??Optional?T??Set</li>
 * </ol>
 * @throw
 */
public static void testMethodReturn() {
    Optional<Long> value = method();
    if (value.isPresent() == true) {
        System.out.println(": " + value.get());
    } else {

        System.out.println(": " + value.or(-12L));
    }

    System.out.println(" orNull: " + value.orNull());

    Optional<Long> valueNoNull = methodNoNull();
    if (valueNoNull.isPresent() == true) {
        Set<Long> set = valueNoNull.asSet();
        System.out.println(" set  size : " + set.size());
        System.out.println(": " + valueNoNull.get());
    } else {
        System.out.println(": " + valueNoNull.or(-12L));
    }

    System.out.println(" orNull: " + valueNoNull.orNull());
}

From source file:org.apache.gobblin.instrumented.Instrumented.java

/**
 * Generates a new {@link org.apache.gobblin.metrics.MetricContext} with the parent and tags taken from the reference context.
 * Allows replacing {@link org.apache.gobblin.metrics.Tag} with new input tags.
 * This method will not copy any {@link org.apache.gobblin.metrics.Metric} contained in the reference {@link org.apache.gobblin.metrics.MetricContext}.
 *
 * @param context Reference {@link org.apache.gobblin.metrics.MetricContext}.
 * @param newTags New {@link org.apache.gobblin.metrics.Tag} to apply to context. Repeated keys will override old tags.
 * @param name Name of the new {@link org.apache.gobblin.metrics.MetricContext}.
 *             If absent or empty, will modify old name by adding a random integer at the end.
 * @return Generated {@link org.apache.gobblin.metrics.MetricContext}.
 *//* www.j av a2 s .c  o m*/
public static MetricContext newContextFromReferenceContext(MetricContext context, List<Tag<?>> newTags,
        Optional<String> name) {

    String newName = name.orNull();

    if (Strings.isNullOrEmpty(newName)) {
        UUID uuid = UUID.randomUUID();
        String randomIdPrefix = "uuid:";

        String oldName = context.getName();
        List<String> splitName = Strings.isNullOrEmpty(oldName) ? Lists.<String>newArrayList()
                : Lists.newArrayList(Splitter.on(".").splitToList(oldName));
        if (splitName.size() > 0 && StringUtils.startsWith(Iterables.getLast(splitName), randomIdPrefix)) {
            splitName.set(splitName.size() - 1, String.format("%s%s", randomIdPrefix, uuid.toString()));
        } else {
            splitName.add(String.format("%s%s", randomIdPrefix, uuid.toString()));
        }
        newName = Joiner.on(".").join(splitName);
    }

    MetricContext.Builder builder = context.getParent().isPresent()
            ? context.getParent().get().childBuilder(newName)
            : MetricContext.builder(newName);
    return builder.addTags(context.getTags()).addTags(newTags).build();
}

From source file:com.eucalyptus.util.CollectionUtils.java

public static <T> Function<Optional<T>, T> optionalOrNull() {
    return new Function<Optional<T>, T>() {
        @Nullable/*from  ww  w .  ja v a2s.  c om*/
        @Override
        public T apply(final Optional<T> optional) {
            return optional == null ? null : optional.orNull();
        }
    };
}