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

Introduction

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

Prototype

public static int frequency(Iterable<?> iterable, @Nullable Object element) 

Source Link

Document

Returns the number of elements in the specified iterable that equal the specified object.

Usage

From source file:com.palantir.common.collect.IterableView.java

public int frequency(@Nullable Object element) {
    return Iterables.frequency(delegate(), element);
}

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From source file:com.github.nethad.clustermeister.provisioning.ec2.commands.AbstractAmazonExecutableCommand.java

/**
 * Wait for a list of futures to complete.
 * //  w w w  . j  av a  2s. c  o  m
 * <p>
 * The futures are considered as failed when they return null or fail to return.
 * </p>
 * @param futures the futures to wait for.
 * @param interruptedMessage 
 *      Log this message when the thread waiting for the futures to return 
 *      is interrupted. The exception's stack trace is appended to this message.
 * @param executionExceptionMessage 
 *      Log this message when the thread waiting for the futures throws an 
 *      exception while waiting. The exception's stack trace is appended to 
 *      this message.
 * @param unsuccessfulFuturesMessage 
 *      Log this message when at least one future failed (or returned null).
 *      Can be a formatted string where '{}' is replaced with the number of 
 *      failed futures.
 * 
 */
protected void waitForFuturesToComplete(List<ListenableFuture<? extends Object>> futures,
        String interruptedMessage, String executionExceptionMessage, String unsuccessfulFuturesMessage) {
    try {
        List<Object> startedNodes = Futures.successfulAsList(futures).get();
        int failedNodes = Iterables.frequency(startedNodes, null);
        if (failedNodes > 0) {
            logger.warn(unsuccessfulFuturesMessage, failedNodes);
        }
    } catch (InterruptedException ex) {
        logger.warn(interruptedMessage, ex);
    } catch (ExecutionException ex) {
        logger.warn(executionExceptionMessage, ex);
    }
}

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From source file:org.opendaylight.yangtools.yang.parser.repo.SharedSchemaContextFactory.java

/**
 * @return set (preserving ordering) from the input collection
 *///from  w  w w  .  j av  a  2  s . c  om
private static List<SourceIdentifier> deDuplicateSources(final Collection<SourceIdentifier> requiredSources) {
    final Set<SourceIdentifier> uniqueSourceIdentifiers = new LinkedHashSet<>(requiredSources);
    if (uniqueSourceIdentifiers.size() == requiredSources.size()) {
        // Can potentially reuse input
        return ImmutableList.copyOf(requiredSources);
    }

    LOG.warn("Duplicate sources requested for schema context, removed duplicate sources: {}", Collections2
            .filter(uniqueSourceIdentifiers, input -> Iterables.frequency(requiredSources, input) > 1));
    return ImmutableList.copyOf(uniqueSourceIdentifiers);
}

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From source file:org.onos.yangtools.yang.parser.repo.SharedSchemaContextFactory.java

/**
 * @return set (preserving ordering) from the input collection
 *///  w  w  w . j  a va  2 s .  c o  m
private List<SourceIdentifier> deDuplicateSources(final Collection<SourceIdentifier> requiredSources) {
    final Set<SourceIdentifier> uniqueSourceIdentifiers = Collections
            .unmodifiableSet(Sets.newLinkedHashSet(requiredSources));
    if (uniqueSourceIdentifiers.size() != requiredSources.size()) {
        LOG.warn("Duplicate sources requested for schema context, removed duplicate sources: {}",
                Collections2.filter(uniqueSourceIdentifiers, new Predicate<SourceIdentifier>() {
                    @Override
                    public boolean apply(@Nullable final SourceIdentifier input) {
                        return Iterables.frequency(requiredSources, input) > 1;
                    }
                }));
    }
    return Lists.newArrayList(uniqueSourceIdentifiers);
}

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