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

Introduction

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

Prototype

public static <T> T getOnlyElement(Iterable<T> iterable)

Source Link

Document

Returns the single element contained in iterable .

Usage

From source file:org.jclouds.sqs.xml.IdHandler.java

@Override
public Map.Entry<String, String> apply(String in) {
    return Iterables.getOnlyElement(ImmutableMap.of(in, in).entrySet());
}

From source file:org.jclouds.http.functions.UnwrapOnlyJsonValue.java

@Override
public T apply(HttpResponse arg0) {
    Map<String, T> map = json.apply(arg0);
    return Iterables.getOnlyElement(map.values());
}

From source file:com.opengamma.financial.convention.DefaultConventionSource.java

@Override
public Convention getConvention(final ExternalId identifier) {
    final ConventionSearchResult result = _conventionMaster
            .searchConvention(new ConventionSearchRequest(identifier));
    final int size = result.getResults().size();
    switch (size) {
    case 0:/*from   w  w w  .  j av a2 s  . co m*/
        return null;
    case 1:
        return Iterables.getOnlyElement(result.getResults()).getConvention();
    default:
        throw new OpenGammaRuntimeException(
                "Multiple matches (" + size + ") to " + identifier + "; expecting one");
    }
}

From source file:com.google.devtools.build.lib.analysis.config.ComposingPatchTransition.java

@Override
public BuildOptions apply(BuildOptions options) {
    return Iterables.getOnlyElement(delegate.split(options));
}

From source file:org.jclouds.gogrid.functions.ParseImageFromJsonResponse.java

@Override
public ServerImage apply(HttpResponse arg0) {
    return Iterables.getOnlyElement(parser.apply(arg0));
}

From source file:dagger.producers.monitoring.internal.Monitors.java

/**
 * Returns a monitor factory that delegates to the given factories, and ensures that any method
 * called on this object, even transitively, does not throw a {@link RuntimeException} or return
 * null./*from w w  w .jav a2  s .  co m*/
 *
 * <p>If the delegate monitors throw an {@link Error}, then that will escape this monitor
 * implementation. Errors are treated as unrecoverable conditions, and may cause the entire
 * component's execution to fail.
 */
public static ProductionComponentMonitor.Factory delegatingProductionComponentMonitorFactory(
        Collection<? extends ProductionComponentMonitor.Factory> factories) {
    if (factories.isEmpty()) {
        return ProductionComponentMonitor.Factory.noOp();
    } else if (factories.size() == 1) {
        return new NonThrowingProductionComponentMonitor.Factory(Iterables.getOnlyElement(factories));
    } else {
        return new DelegatingProductionComponentMonitor.Factory(factories);
    }
}

From source file:org.apache.drill.exec.physical.impl.limit.LimitBatchCreator.java

@Override
public LimitRecordBatch getBatch(FragmentContext context, Limit config, List<RecordBatch> children)
        throws ExecutionSetupException {
    return new LimitRecordBatch(config, context, Iterables.getOnlyElement(children));
}

From source file:eu.interedition.collatex.util.ParallelSegmentationApparatus.java

public static void generate(VariantGraphRanking ranking, GeneratorCallback callback) {

    callback.start();/*from w  ww.  j av  a2 s.c o m*/

    final Set<Witness> allWitnesses = ranking.witnesses();
    for (Iterator<Map.Entry<Integer, Collection<VariantGraph.Vertex>>> rowIt = ranking.getByRank().asMap()
            .entrySet().iterator(); rowIt.hasNext();) {
        final Map.Entry<Integer, Collection<VariantGraph.Vertex>> row = rowIt.next();
        final int rank = row.getKey();
        final Collection<VariantGraph.Vertex> vertices = row.getValue();

        if (vertices.size() == 1 && Iterables.getOnlyElement(vertices).tokens().isEmpty()) {
            // skip start and end vertex
            continue;
        }

        // spreading vertices with same rank according to their registered transpositions
        final Multimap<Integer, VariantGraph.Vertex> verticesByTranspositionRank = HashMultimap.create();
        for (VariantGraph.Vertex v : vertices) {
            int transpositionRank = 0;
            for (VariantGraph.Transposition transposition : v.transpositions()) {
                for (VariantGraph.Vertex tv : transposition) {
                    transpositionRank += (ranking.apply(tv).intValue() - rank);
                }
            }
            verticesByTranspositionRank.put(transpositionRank, v);
        }

        // render segments
        for (Iterator<Integer> transpositionRankIt = Ordering.natural()
                .immutableSortedCopy(verticesByTranspositionRank.keySet()).iterator(); transpositionRankIt
                        .hasNext();) {
            final Multimap<Witness, Token> tokensByWitness = HashMultimap.create();
            for (VariantGraph.Vertex v : verticesByTranspositionRank.get(transpositionRankIt.next())) {
                for (Token token : v.tokens()) {
                    tokensByWitness.put(token.getWitness(), token);
                }
            }

            final SortedMap<Witness, Iterable<Token>> cellContents = Maps.newTreeMap(Witness.SIGIL_COMPARATOR);
            for (Witness witness : allWitnesses) {
                cellContents.put(witness,
                        tokensByWitness.containsKey(witness)
                                ? Iterables.unmodifiableIterable(tokensByWitness.get(witness))
                                : Collections.<Token>emptySet());
            }

            callback.segment(cellContents);
        }
    }

    callback.end();
}

From source file:com.opengamma.master.security.impl.AbstractSecurityLoader.java

@Override
public UniqueId loadSecurity(ExternalIdBundle externalIdBundle) {
    SecurityLoaderRequest request = SecurityLoaderRequest.create(externalIdBundle);
    SecurityLoaderResult result = loadSecurities(request);
    if (result.getResultMap().size() == 0) {
        throw new OpenGammaRuntimeException("Unable to load security: " + externalIdBundle);
    }//ww  w  .  java  2s.c o m
    return Iterables.getOnlyElement(result.getResultMap().values());
}

From source file:org.apache.beam.sdk.extensions.sql.utils.RowAsserts.java

public static SerializableFunction<Iterable<Row>, Void> matchesScalar(float expected, float delta) {

    return input -> {
        Row row = Iterables.getOnlyElement(input);
        assertNotNull(row);//from   ww  w . jav a2s .  co  m
        assertEquals(expected, row.getFloat(0), delta);
        return null;
    };
}