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:co.cask.cdap.data2.datafabric.dataset.service.DatasetService.java

@Override
protected void startUp() throws Exception {
    LOG.info("Starting DatasetService...");

    mdsDatasets.startAndWait();/*from w w  w .  j  a  v a2 s .com*/
    typeManager.startAndWait();
    opExecutorClient.startAndWait();
    httpService.startAndWait();

    // setting watch for ops executor service that we need to be running to operate correctly
    ServiceDiscovered discover = discoveryServiceClient.discover(Constants.Service.DATASET_EXECUTOR);
    opExecutorDiscovered = SettableFuture.create();
    opExecutorServiceWatch = discover.watchChanges(new ServiceDiscovered.ChangeListener() {
        @Override
        public void onChange(ServiceDiscovered serviceDiscovered) {
            if (!Iterables.isEmpty(serviceDiscovered)) {
                LOG.info("Discovered {} service", Constants.Service.DATASET_EXECUTOR);
                opExecutorDiscovered.set(serviceDiscovered);
            }
        }
    }, MoreExecutors.sameThreadExecutor());

    for (DatasetMetricsReporter metricsReporter : metricReporters) {
        metricsReporter.start();
    }
}

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From source file:com.google.cloud.dataflow.sdk.testing.CoderProperties.java

/**
 * Verifies that for the given {@code Coder<Iterable<T>>},
 * and value of type {@code Iterable<T>}, encoding followed by decoding yields an
 * equal value of type {@code Collection<T>}, in the given {@code Coder.Context}.
 *//*w w  w.j  a v a2  s. c om*/
@SuppressWarnings("unchecked")
public static <T, IterableT extends Iterable<T>> void coderDecodeEncodeContentsInSameOrderInContext(
        Coder<IterableT> coder, Coder.Context context, IterableT value) throws Exception {
    Iterable<T> result = decodeEncode(coder, context, value);
    // Matchers.contains() requires at least one element
    if (Iterables.isEmpty(value)) {
        assertThat(result, emptyIterable());
    } else {
        // This is the only Matchers.contains() overload that takes literal values
        assertThat(result, contains((T[]) Iterables.toArray(value, Object.class)));
    }
}

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From source file:org.eclipse.sirius.diagram.sequence.ui.tool.internal.edit.validator.AbstractInteractionFrameValidator.java

/**
 * Performs all the computations required to validate the resizing, and
 * stores any important information which will be useful to actually execute
 * the resize if it is valid, like for example avoid contact with siblings.
 *///  w  w  w  . j  a v a 2s . c o  m
protected void validate() {
    valid = checkAndComputeRanges();
    if (valid) {
        Collection<ISequenceEvent> finalParents = getFinalParentsWithAutoExpand();

        Collection<ISequenceEvent> movableParents = Lists
                .newArrayList(Iterables.filter(finalParents, Predicates.not(unMove)));
        Collection<ISequenceEvent> fixedParents = Lists.newArrayList(Iterables.filter(finalParents, unMove));
        if (movableParents.isEmpty() || !movedElements.containsAll(movableParents)) {

            valid = valid && Iterables.isEmpty(Iterables.filter(finalParents, invalidParents));
            valid = valid && (!Iterables.any(finalParents, Predicates.instanceOf(Operand.class))
                    || finalParents.size() == 1);
            valid = valid && checkFinalRangeStrictlyIncludedInParents(movableParents);
            valid = valid && checkLocalSiblings(movableParents);
        }
        valid = valid && checkFinalRangeStrictlyIncludedInParents(fixedParents);
        valid = valid && checkLocalSiblings(fixedParents);
    }

    if (getRequestQuery().isResize()) {
        valid = valid && checkGlobalPositions();
    }
}

---

From source file:org.apache.cassandra.db.lifecycle.View.java

static Function<View, View> updateLiveSet(final Set<SSTableReader> remove, final Iterable<SSTableReader> add) {
    if (remove.isEmpty() && Iterables.isEmpty(add))
        return Functions.identity();
    return new Function<View, View>() {
        public View apply(View view) {
            Map<SSTableReader, SSTableReader> sstableMap = replace(view.sstablesMap, remove, add);
            return new View(view.liveMemtables, view.flushingMemtables, sstableMap, view.compacting,
                    SSTableIntervalTree.build(sstableMap.keySet()));
        }/*from  ww  w.ja va  2  s . c  o m*/
    };
}

---

From source file:com.spectralogic.ds3cli.command.PutBulk.java

@Override
public PutBulkResult call() throws Exception {
    /* Ensure the bucket exists and if not create it */
    final Ds3ClientHelpers helpers = getClientHelpers();
    helpers.ensureBucketExists(this.bucketName);

    Iterable<Path> filesToPut = this.getFilesToPut();
    if (this.sync) {
        filesToPut = new FilteringIterable<>(filesToPut, new SyncFilter(this.prefix != null ? this.prefix : "",
                this.inputDirectory, this.getClientHelpers(), this.bucketName));

        if (Iterables.isEmpty(filesToPut)) {
            return new PutBulkResult("SUCCESS: All files are up to date");
        }//from   w  ww.  j  a va 2  s.  com
    }

    final FileUtils.ObjectsToPut objectsToPut = FileUtils.getObjectsToPut(filesToPut, this.inputDirectory,
            this.prefix, this.ignoreErrors);
    final Iterable<Ds3Object> ds3Objects = objectsToPut.getDs3Objects();

    return this.transfer(helpers, ds3Objects, objectsToPut.getDs3IgnoredObjects());
}

---

From source file:com.isotrol.impe3.core.modules.ModuleDefinitionLoader.java

private void checkMethods() throws ModuleException {
    final List<Method> methods = getMethods();
    // The interface must not be empty
    if (methods.isEmpty()) {
        throw new EmptyModuleException(getType());
    }/*from  w  ww . j  a va2 s.c  om*/
    // And all methods must be either dependencies, provisions or a configuration.
    if (!Iterables.isEmpty(filter(methods, IS_INVALID))) {
        throw new InvalidMethodsException(getType());
    }
}

---

From source file:org.cinchapi.common.util.NonBlockingHashMultimap.java

@Override
public boolean putAll(K key, Iterable<? extends V> values) {
    if (!Iterables.isEmpty(values)) {
        Set<V> set = get(key);
        if (set == emptySet) {
            set = new NonBlockingHashSet<V>();
            map.put(key, set);//from ww w .  j a v a2 s .  c o  m
        }
        int currentSize = set.size();
        Iterators.addAll(set, values.iterator());
        if (set.size() - currentSize > 0) {
            totalSize += (set.size() - currentSize);
            return true;
        } else {
            return false;
        }
    } else {
        return false;
    }
}

---

From source file:org.eclipse.sirius.diagram.editor.properties.sections.style.nodestyledescription.NodeStyleDescriptionSizeComputationExpressionPropertySection.java

private boolean needsCustomTooltip() {
    boolean customEObjectTooltip = eObject instanceof WorkspaceImageDescription;
    boolean customEObjectListTooltip = eObjectList != null && !eObjectList.isEmpty()
            && !Iterables.isEmpty(Iterables.filter(eObjectList, WorkspaceImageDescription.class));
    return customEObjectTooltip || customEObjectListTooltip;
}

---

From source file:org.apache.druid.server.ClientInfoResource.java

@GET
@Path("/{dataSourceName}")
@Produces(MediaType.APPLICATION_JSON)//from w w w .  ja va2  s .c o m
@ResourceFilters(DatasourceResourceFilter.class)
public Map<String, Object> getDatasource(@PathParam("dataSourceName") String dataSourceName,
        @QueryParam("interval") String interval, @QueryParam("full") String full) {
    if (full == null) {
        return ImmutableMap.of(KEY_DIMENSIONS, getDatasourceDimensions(dataSourceName, interval), KEY_METRICS,
                getDatasourceMetrics(dataSourceName, interval));
    }

    Interval theInterval;
    if (interval == null || interval.isEmpty()) {
        DateTime now = getCurrentTime();
        theInterval = new Interval(segmentMetadataQueryConfig.getDefaultHistory(), now);
    } else {
        theInterval = Intervals.of(interval);
    }

    TimelineLookup<String, ServerSelector> timeline = timelineServerView
            .getTimeline(new TableDataSource(dataSourceName));
    Iterable<TimelineObjectHolder<String, ServerSelector>> serversLookup = timeline != null
            ? timeline.lookup(theInterval)
            : null;
    if (serversLookup == null || Iterables.isEmpty(serversLookup)) {
        return Collections.EMPTY_MAP;
    }
    Map<Interval, Object> servedIntervals = new TreeMap<>(new Comparator<Interval>() {
        @Override
        public int compare(Interval o1, Interval o2) {
            if (o1.equals(o2) || o1.overlaps(o2)) {
                return 0;
            } else {
                return o1.isBefore(o2) ? -1 : 1;
            }
        }
    });

    for (TimelineObjectHolder<String, ServerSelector> holder : serversLookup) {
        final Set<Object> dimensions = Sets.newHashSet();
        final Set<Object> metrics = Sets.newHashSet();
        final PartitionHolder<ServerSelector> partitionHolder = holder.getObject();
        if (partitionHolder.isComplete()) {
            for (ServerSelector server : partitionHolder.payloads()) {
                final DataSegment segment = server.getSegment();
                dimensions.addAll(segment.getDimensions());
                metrics.addAll(segment.getMetrics());
            }
        }

        servedIntervals.put(holder.getInterval(),
                ImmutableMap.of(KEY_DIMENSIONS, dimensions, KEY_METRICS, metrics));
    }

    //collapse intervals if they abut and have same set of columns
    Map<String, Object> result = Maps.newLinkedHashMap();
    Interval curr = null;
    Map<String, Set<String>> cols = null;
    for (Map.Entry<Interval, Object> e : servedIntervals.entrySet()) {
        Interval ival = e.getKey();
        if (curr != null && curr.abuts(ival) && cols.equals(e.getValue())) {
            curr = curr.withEnd(ival.getEnd());
        } else {
            if (curr != null) {
                result.put(curr.toString(), cols);
            }
            curr = ival;
            cols = (Map<String, Set<String>>) e.getValue();
        }
    }
    //add the last one in
    if (curr != null) {
        result.put(curr.toString(), cols);
    }
    return result;
}

---

From source file:org.asoem.greyfish.core.actions.ContractNetInitiatorAction.java

private static MessageTemplate createAcceptReplyTemplate(
        final Iterable<? extends ACLMessage<?>> acceptMessages) {
    if (Iterables.isEmpty(acceptMessages)) {
        return MessageTemplates.alwaysFalse();
    } else {//  w  ww. ja v a  2  s .  c o  m
        return MessageTemplates.or( // is a reply
                Iterables.toArray(
                        Iterables.transform(acceptMessages, new Function<ACLMessage, MessageTemplate>() {
                            @Override
                            public MessageTemplate apply(final ACLMessage aclMessage) {
                                return MessageTemplates.isReplyTo(aclMessage);
                            }
                        }), MessageTemplate.class));
    }
}

---

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