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:nz.co.testamation.common.contract.Conditions.java

public static <T> T notEmpty(T obj) {
    if (obj instanceof CharSequence && StringUtils.isBlank((CharSequence) obj)) {
        throw new IllegalStateException("Expected char sequence to not be empty");
    }/* w w  w. j a v a  2  s. co m*/

    if (obj instanceof Iterable && Iterables.isEmpty((Iterable<?>) obj)) {
        throw new IllegalStateException("Expected iterable to not be empty");
    }

    return Conditions.notNull(obj);
}

From source file:org.apache.aurora.common.args.constraints.NotEmptyIterableVerifier.java

@Override
public void verify(Iterable<?> value, Annotation annotation) {
    checkArgument(!Iterables.isEmpty(value), "Value must not be empty.");
}

From source file:org.apache.aurora.scheduler.filter.ConstraintMatcher.java

/**
 * Gets the veto (if any) for a scheduling constraint based on the {@link AttributeAggregate} this
 * filter was created with.// w  ww  .j  a va  2  s .  c  o  m
 *
 * @param constraint Scheduling filter to check.
 * @return A veto if the constraint is not satisfied based on the existing state of the job.
 */
static Optional<Veto> getVeto(AttributeAggregate cachedjobState, Iterable<IAttribute> hostAttributes,
        IConstraint constraint) {

    Iterable<IAttribute> sameNameAttributes = Iterables.filter(hostAttributes,
            new NameFilter(constraint.getName()));
    Optional<IAttribute> attribute;
    if (Iterables.isEmpty(sameNameAttributes)) {
        attribute = Optional.absent();
    } else {
        Set<String> attributeValues = ImmutableSet
                .copyOf(Iterables.concat(Iterables.transform(sameNameAttributes, GET_VALUES)));
        attribute = Optional.of(IAttribute.build(new Attribute(constraint.getName(), attributeValues)));
    }

    ITaskConstraint taskConstraint = constraint.getConstraint();
    switch (taskConstraint.getSetField()) {
    case VALUE:
        boolean matches = AttributeFilter.matches(attribute.transform(GET_VALUES).or(ImmutableSet.of()),
                taskConstraint.getValue());
        return matches ? Optional.absent() : Optional.of(Veto.constraintMismatch(constraint.getName()));

    case LIMIT:
        if (!attribute.isPresent()) {
            return Optional.of(Veto.constraintMismatch(constraint.getName()));
        }

        boolean satisfied = AttributeFilter.matches(attribute.get(), taskConstraint.getLimit().getLimit(),
                cachedjobState);
        return satisfied ? Optional.absent() : Optional.of(Veto.unsatisfiedLimit(constraint.getName()));

    default:
        throw new SchedulerException(
                "Failed to recognize the constraint type: " + taskConstraint.getSetField());
    }
}

From source file:org.eclipse.sirius.diagram.ui.tools.internal.graphical.edit.part.DDiagramHelper.java

/**
 * Find the parent diagram./* w  w  w  . j a va 2s  .c om*/
 * 
 * @param element
 *            Edit part.
 * @return The parent diagram or <code>null</code> if not found.
 */
public static IDDiagramEditPart findParentDiagram(final EditPart element) {
    IDDiagramEditPart result = null;
    if (element instanceof IDDiagramEditPart) {
        result = (IDDiagramEditPart) element;
    } else if (element instanceof DDiagramRootEditPart) {
        Iterable<IDDiagramEditPart> ddiagramChildren = Iterables.filter(element.getChildren(),
                IDDiagramEditPart.class);
        if (!Iterables.isEmpty(ddiagramChildren)) {
            result = ddiagramChildren.iterator().next();
        }
    } else if (element != null) {
        result = DDiagramHelper.findParentDiagram(element.getParent());
    }
    return result;
}

From source file:org.eclipse.emf.eson.scoping.SimpleEPackageScope.java

@Override
public Iterable<IEObjectDescription> getElements(EObject object) {
    Iterable<IEObjectDescription> result = super.getElements(object);
    if (Iterables.isEmpty(result) && (object instanceof EPackage)) {
        final EPackage ePackage = (EPackage) object;
        Iterable<IEObjectDescription> localElements = getLocalElementsByEClass(EcorePackage.Literals.EPACKAGE);
        result = Iterables.filter(localElements, new Predicate<IEObjectDescription>() {
            @Override//  w w  w .  j av a2 s.  c  om
            public boolean apply(IEObjectDescription input) {
                return input.getQualifiedName().getFirstSegment().equals(ePackage.getNsURI());
            }
        });
    }
    return result;
}

From source file:org.gradle.internal.fingerprint.impl.DefaultCurrentFileCollectionFingerprint.java

public static CurrentFileCollectionFingerprint from(Iterable<FileSystemSnapshot> roots,
        FingerprintingStrategy strategy) {
    if (Iterables.isEmpty(roots)) {
        return strategy.getIdentifier().getEmptyFingerprint();
    }/*w ww.  j  av a  2  s .  co  m*/
    Map<String, FileSystemLocationFingerprint> snapshots = strategy.collectFingerprints(roots);
    if (snapshots.isEmpty()) {
        return strategy.getIdentifier().getEmptyFingerprint();
    }
    return new DefaultCurrentFileCollectionFingerprint(snapshots, strategy.getCompareStrategy(),
            strategy.getIdentifier(), roots);
}

From source file:com.twitter.hbc.core.HttpHosts.java

/**
 * All httpHosts must start with the http scheme("http:// or https://")
 *//*from  w w w  .j  a  v  a2s  .  c  o m*/
public HttpHosts(Iterable<String> addresses) {
    Preconditions.checkNotNull(addresses);
    Preconditions.checkArgument(!Iterables.isEmpty(addresses));
    for (String address : addresses) {
        if (!address.toLowerCase().startsWith(HttpConstants.HTTP_SCHEME + "://")
                && !address.toLowerCase().startsWith(HttpConstants.HTTPS_SCHEME + "://")) {
            throw new IllegalArgumentException("Address doesn't have an http scheme: " + address);
        }
    }
    List<String> copy = Lists.newArrayList(addresses);
    Collections.shuffle(copy);
    this.hosts = Iterators.cycle(copy);
}

From source file:com.bigfatgun.fixjures.dao.FakeService.java

public void deleteObjectWithLowestBalance() {
    List<MyBusinessObject> businessObjectList = dao.findAllOrderedByAccountBalance();
    if (!Iterables.isEmpty(businessObjectList)) {
        dao.delete(businessObjectList.iterator().next());
    }//from  w ww . j av a2 s . c  o m
}

From source file:org.tensorics.core.booleans.operations.And.java

@Override
public Boolean apply(Iterable<Boolean> booleanList) {
    if (Iterables.isEmpty(booleanList)) {
        throw new NoSuchElementException("Cannot perform a logical AND with no elements");
    }/*from ww  w  .  ja v  a 2s . co m*/
    return stream(booleanList.spliterator(), false).allMatch(TRUE::equals);
}

From source file:com.vilt.minium.impl.WaitPredicates.java

/**
 * Predicate to use with {@link WaitWebElements#wait(Predicate)} methods which ensures that
 * evaluation will only be successful when this instance is not empty (that is, evaluates
 * to one or more {@link WebElement} instances.
 *
 * @param <T> the generic type//  w ww . j  ava2s. com
 * @return predicate that returns true if it is empty
 */
public static <T extends WebElements> Predicate<T> whileEmpty() {
    return new Predicate<T>() {
        @Override
        public boolean apply(T input) {
            return !Iterables.isEmpty(input);
        }

        @Override
        public String toString() {
            return "whileEmpty()";
        }
    };
}