Example usage for com.google.common.collect Iterables isEmpty

Introduction

In this page you can find the example usage for com.google.common.collect Iterables isEmpty.

Prototype

public static boolean isEmpty(Iterable<?> iterable)

Source Link

Document

Determines if the given iterable contains no elements.

Usage

From source file:ezbake.services.graph.SelectorVertexFactory.java

private Long lookup(String uniqueVal) {
    SecureTitanTx tx = graph.buildTransaction()
            .setReadToken(AccumuloSecurityToken.getInstance().newReadToken(UNIQUE_VIS)).start();

    Iterable<Vertex> itrbl = tx.getVertices(EzGraphServiceConstants.UNIQUE_KEY, uniqueVal);

    Long vid = null;/*from  ww  w .  j  a  va  2s .c o  m*/
    if (!Iterables.isEmpty(itrbl)) {
        TitanVertex selectorVertex = (TitanVertex) Iterables.getOnlyElement(itrbl);
        vid = selectorVertex.getID();
    }

    return vid;
}

From source file:com.reprezen.swagedit.editor.outline.OutlineContentProvider.java

@Override
public boolean hasChildren(Object element) {
    if (element instanceof AbstractNode) {
        return !Iterables.isEmpty(((AbstractNode) element).elements());
    }//from w ww .j  ava2 s. com
    return false;
}

From source file:org.xacml4j.v30.spi.pip.DefaultPolicyInformationPoint.java

@Override
public BagOfAttributeExp resolve(final EvaluationContext context, AttributeDesignatorKey ref) throws Exception {
    if (log.isDebugEnabled()) {
        log.debug("Trying to resolve designator=\"{}\"", ref);
    }// w w  w. ja v a 2 s.  c om
    Iterable<AttributeResolver> resolvers = registry.getMatchingAttributeResolvers(context, ref);
    if (Iterables.isEmpty(resolvers)) {
        if (log.isDebugEnabled()) {
            log.debug("No matching resolver found for designator=\"{}\"", ref);
        }
        return null;
    }
    for (AttributeResolver r : resolvers) {
        AttributeResolverDescriptor d = r.getDescriptor();
        Preconditions.checkState(d.canResolve(ref));
        ResolverContext rContext = createContext(context, d);
        AttributeSet attributes = null;
        if (d.isCacheable()) {
            if (log.isDebugEnabled()) {
                log.debug("Trying to find resolver id=\"{}\" values in cache", d.getId());
            }
            attributes = cache.getAttributes(rContext);
            if (attributes != null && !isExpired(attributes, context)) {
                if (log.isDebugEnabled()) {
                    log.debug("Found cached resolver id=\"{}\" values=\"{}\"", d.getId(), attributes);
                }
                return attributes.get(ref.getAttributeId());
            }
        }
        try {
            if (log.isDebugEnabled()) {
                log.debug("Trying to resolve values with resolver id=\"{}\"", d.getId());
            }
            attributes = r.resolve(rContext);
            if (attributes.isEmpty()) {
                if (log.isDebugEnabled()) {
                    log.debug("Resolver id=\"{}\" failed to resolve attributes", d.getId());
                }
                continue;
            }
            if (log.isDebugEnabled()) {
                log.debug("Resolved attributes=\"{}\"", attributes);
            }
        } catch (Exception e) {
            if (log.isDebugEnabled()) {
                log.debug("Resolver id=\"{}\" failed to resolve attributes", d.getId(), e);
            }
            continue;
        }
        // check if resolver
        // descriptor allows long term caching
        if (d.isCacheable() && !attributes.isEmpty()) {
            cache.putAttributes(rContext, attributes);
        }
        context.setDecisionCacheTTL(d.getPreferredCacheTTL());
        return attributes.get(ref.getAttributeId());
    }
    return ref.getDataType().emptyBag();
}

From source file:com.spectralogic.ds3cli.util.RecoveryFileManager.java

public static String deleteFileList(final Iterable<Path> files) {
    if (Iterables.isEmpty(files)) {
        return "No matching recovery files found.";
    }//from ww  w  .  j a  va  2 s  . c o  m
    final StringBuffer fileList = new StringBuffer("Deleted:\n");
    try {
        for (final Path file : files) {
            final RecoveryJob job = getRecoveryJobByName(file.getFileName().toString());
            Files.delete(file);
            fileList.append(job.toString());
            fileList.append("\n");
        }
        return fileList.toString();
    } catch (final IOException e) {
        return e.getMessage();
    }
}

From source file:org.codeseed.common.config.AnnotationPropertySource.java

/**
 * Creates a property source backed by some number of annotation property
 * sources. The resulting property source will consider annotations (in
 * order) on configuration interface methods when trying to resolve property
 * values. If the configuration method contains no annotations, this
 * property source will always return {@code null}.
 *
 * @param sources//  ww w  .  j ava  2  s  .  c  o  m
 *            the annotation property sources to aggregate
 * @return a single property source which delegates to the supplied sources
 *         in annotation declaration order
 */
public static PropertySource create(Iterable<? extends AnnotationPropertySource<?>> sources) {
    if (Iterables.isEmpty(sources)) {
        return PropertySources.empty();
    }
    return new AnnotationsPropertySource(sources);
}

From source file:org.caleydo.view.tourguide.internal.serialize.TourGuideSerializationAddon.java

@Override
public void serialize(Collection<? extends IDataDomain> toSave, Marshaller marshaller, String dirName) {
    Iterable<ISerializeableScore> toPersist = Scores.get().getPersistentScores();
    if (Iterables.isEmpty(toPersist))
        return;//from   w ww  .j a va  2s .co  m
    File f = new File(dirName, PERSISTENT_SCORES_XML);
    PersistentScores scores = new PersistentScores(toPersist);
    try {
        marshaller.marshal(scores, f);
    } catch (JAXBException e) {
        log.error("can't serialize", e);
    }
}

From source file:com.atlassian.jira.license.MultiLicenseStoreImpl.java

@Override
public void store(@Nonnull final Iterable<String> newLicenseKeys) {
    checkNotNull(newLicenseKeys, "newLicenseKeys");
    if (licenseRolesAreEnabled()) {
        if (Iterables.isEmpty(newLicenseKeys)) {
            throw new IllegalArgumentException("You must store at least one license.");
        }// w ww.j a v a2s  .  c  om

        if (any(newLicenseKeys, Predicates.isNull())) {
            throw new IllegalArgumentException(
                    "You cannot store null licenses - no changes have been made to licenses.");
        }

        entityEngine.delete(from(PRODUCT_LICENSE).all());

        for (String licenseKey : newLicenseKeys) {
            entityEngine.createValue(PRODUCT_LICENSE, new ProductLicense(licenseKey));
        }

        String singleLicense = trimToNull(jiraLicenseStore.retrieve());
        if (singleLicense != null) {
            jiraLicenseStore.remove();
        }
    } else {
        Iterator<String> iterator = newLicenseKeys.iterator();
        if (iterator.hasNext()) {
            jiraLicenseStore.store(iterator.next());
        } else {
            jiraLicenseStore.store(null);
        }
    }
}

From source file:eu.numberfour.n4js.scoping.utils.DynamicPseudoScope.java

@Override
public Iterable<IEObjectDescription> getElements(EObject object) {
    Iterable<IEObjectDescription> result = parent.getElements(object);
    if (Iterables.isEmpty(result)) {
        if (object instanceof IdentifiableElement) {
            return Collections.singletonList(EObjectDescription
                    .create(QualifiedName.create(((IdentifiableElement) object).getName()), object));
        }//from  w  w  w  . j  av  a 2s .  co m
    }
    return result;
}

From source file:org.trancecode.collection.TcIterables.java

public static <T> Iterable<T> getDescendants(final Iterable<T> parentElements,
        final Function<T, Iterable<T>> getChildFunction) {
    if (Iterables.isEmpty(parentElements)) {
        return parentElements;
    }/* w  ww  .j  a  v  a 2s. c om*/

    final Iterable<T> children = Iterables.concat(Iterables.transform(parentElements, getChildFunction));

    return Iterables.concat(parentElements, getDescendants(children, getChildFunction));
}

From source file:org.openscience.cdk.layout.CorrectGeometricConfiguration.java

/**
 * Adjust all double bond elements in the provided structure. <b>IMPORTANT:
 * up/down labels should be adjusted before adjust double-bond
 * configurations. coordinates are reflected by this method which can lead
 * to incorrect tetrahedral specification.</b>
 *
 * @param container the structure to adjust
 * @throws IllegalArgumentException an atom had unset coordinates
 *///from w  ww. j  a v a  2 s .c o  m
public static IAtomContainer correct(IAtomContainer container) {
    if (!Iterables.isEmpty(container.stereoElements()))
        new CorrectGeometricConfiguration(container);
    return container;
}