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

Introduction

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

Prototype

public abstract boolean isPresent();

Source Link

Document

Returns true if this holder contains a (non-null) instance.

Usage

From source file:de.flapdoodle.logparser.matcher.stacktrace.AbstractStackElement.java

protected static <T> Optional<T> match(CharSequence input, Pattern pattern, IStackElementFactory<T> factory) {
    Optional<Map<String, String>> m = Patterns.match(pattern.matcher(input));
    if (m.isPresent()) {
        return Optional.of(factory.newInstance(input.toString(), m.get()));
    }/*from w  ww .  j  a  v a2  s .com*/
    return Optional.absent();
}

From source file:net.pterodactylus.sonitus.io.FlacIdentifier.java

/**
 * Tries to identify the FLAC file contained in the given stream.
 *
 * @param inputStream/*from   www.  j  a v a  2s.c  o m*/
 *       The input stream
 * @return The identified metadata, or {@link Optional#absent()} if the
 *         metadata can not be identified
 * @throws IOException
 *       if an I/O error occurs
 */
public static Optional<Metadata> identify(InputStream inputStream) throws IOException {
    Optional<Stream> stream = Stream.parse(inputStream);
    if (!stream.isPresent()) {
        return Optional.absent();
    }

    List<MetadataBlock> streamInfos = stream.get().metadataBlocks(STREAMINFO);
    if (streamInfos.isEmpty()) {
        /* FLAC file without STREAMINFO is invalid. */
        return Optional.absent();
    }

    MetadataBlock streamInfoBlock = streamInfos.get(0);
    StreamInfo streamInfo = (StreamInfo) streamInfoBlock.data();

    return Optional
            .of(new Metadata(new FormatMetadata(streamInfo.numberOfChannels(), streamInfo.sampleRate(), "FLAC"),
                    new ContentMetadata()));
}

From source file:com.complexible.common.base.Optionals.java

public static <T> Predicate<Optional<T>> present() {
    return new Predicate<Optional<T>>() {
        @Override/*from  ww w . j a va  2s.  com*/
        public boolean apply(final Optional<T> input) {
            return input.isPresent();
        }
    };
}

From source file:org.opendaylight.groupbasedpolicy.util.DataStoreHelper.java

/**
 * If an element on the path exists in datastore the element is removed and returned as a result.
 * {@link Optional#isPresent()} is {@code false} in case that element on path does not exist.
 * @return removed element in {@link Optional#get()}; otherwise {@link Optional#absent()}
 *///from   ww w .j  a  v  a 2s . com
public static <T extends DataObject> Optional<T> removeIfExists(LogicalDatastoreType store,
        InstanceIdentifier<T> path, ReadWriteTransaction rwTx) {
    Optional<T> potentialResult = readFromDs(store, path, rwTx);
    if (potentialResult.isPresent()) {
        rwTx.delete(store, path);
    }
    return potentialResult;
}

From source file:info.gehrels.voting.OptionalMatchers.java

public static Matcher<Optional<?>> anAbsentOptional() {
    return new TypeSafeDiagnosingMatcher<Optional<?>>() {
        @Override//from  www  . j  a  v a 2 s.c om
        protected boolean matchesSafely(Optional<?> item, Description mismatchDescription) {
            if (item.isPresent()) {
                mismatchDescription.appendText("an Optional whose value was ").appendValue(item.get());
                return false;
            }

            return true;
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("an absent Optional");
        }
    };
}

From source file:io.crate.planner.Limits.java

public static Optional<Symbol> mergeMin(Optional<Symbol> limit1, Optional<Symbol> limit2) {
    if (limit1.isPresent()) {
        if (limit2.isPresent()) {
            return Optional
                    .of(new Function(LeastFunction.TWO_LONG_INFO, Arrays.asList(limit1.get(), limit2.get())));
        }/*from  w  w  w  . j av  a2  s .c  o  m*/
        return limit1;
    }
    return limit2;
}

From source file:com.facebook.buck.cxx.CxxCompilableEnhancer.java

/**
 * Resolve the map of names to SourcePaths to a map of names to CxxSource objects.
 *///w w  w  .  j a v a  2s. c  o  m
public static ImmutableMap<String, CxxSource> resolveCxxSources(ImmutableMap<String, SourceWithFlags> sources) {

    ImmutableMap.Builder<String, CxxSource> cxxSources = ImmutableMap.builder();

    // For each entry in the input C/C++ source, build a CxxSource object to wrap
    // it's name, input path, and output object file path.
    for (ImmutableMap.Entry<String, SourceWithFlags> ent : sources.entrySet()) {
        String extension = Files.getFileExtension(ent.getKey());
        Optional<CxxSource.Type> type = CxxSource.Type.fromExtension(extension);
        if (!type.isPresent()) {
            throw new HumanReadableException("invalid extension \"%s\": %s", extension, ent.getKey());
        }
        cxxSources.put(ent.getKey(),
                CxxSource.of(type.get(), ent.getValue().getSourcePath(), ent.getValue().getFlags()));
    }

    return cxxSources.build();
}

From source file:org.opendaylight.faas.fabric.utils.InterfaceManager.java

public static LportAttribute getLogicalPortAttr(DataBroker broker, InstanceIdentifier<TerminationPoint> iid) {
    ReadTransaction rt = broker.newReadOnlyTransaction();
    Optional<TerminationPoint> opt = MdSalUtils.syncReadOper(rt, iid);
    if (opt.isPresent()) {
        TerminationPoint tp = opt.get();
        return tp.getAugmentation(LogicalPortAugment.class).getLportAttribute();
    }/* w  w w . j  av a2s .com*/
    return null;
}

From source file:org.brooklyncentral.catalog.scrape.CatalogItemScraper.java

@SuppressWarnings("unchecked")
private static List<String> parseDirectoryYaml(String repoUrl) {
    Optional<String> directoryYamlString = getGithubRawText(repoUrl, "directory.yaml");

    if (!directoryYamlString.isPresent()) {
        throw new IllegalStateException("Failed to read catalog directory.");
    }/*ww  w. j ava 2 s .c  o m*/

    return (List<String>) Yamls.parseAll(directoryYamlString.get()).iterator().next();
}

From source file:com.complexible.common.base.Optionals.java

public static <T> List<T> all(final Collection<Optional<T>> theCollection) {
    List<T> aList = Lists.newArrayList();
    for (Optional<T> aOpt : theCollection) {
        if (aOpt.isPresent()) {
            aList.add(aOpt.get());// w  w  w  . jav a2s.  co  m
        }
    }

    return aList;
}