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:com.opengamma.financial.analytics.model.forex.option.callspreadblack.FXDigitalCallSpreadBlackCurveSensitivityFunction.java

@Override
protected Set<ComputedValue> getResult(final InstrumentDerivative fxDigital,
        final ForexOptionDataBundle<?> data, final ComputationTarget target,
        final Set<ValueRequirement> desiredValues, final FunctionInputs inputs, final ValueSpecification spec,
        final FunctionExecutionContext executionContext) {
    final String spreadName = Iterables.getOnlyElement(desiredValues)
            .getConstraint(CalculationPropertyNamesAndValues.PROPERTY_CALL_SPREAD_VALUE);
    final double spread = Double.parseDouble(spreadName);
    final PresentValueCurveSensitivityCallSpreadBlackForexCalculator calculator = new PresentValueCurveSensitivityCallSpreadBlackForexCalculator(
            spread);//w w w.ja va 2s . co m
    final MultipleCurrencyInterestRateCurveSensitivity result = fxDigital.accept(calculator, data);
    return Collections.singleton(new ComputedValue(spec, result));
}

From source file:com.gravitant.cloud.adapters.provision.providers.VolumeDetached.java

public boolean apply(Attachment attachment) {
    logger.trace("looking for volume %s", attachment.getVolumeId());
    Volume volume = Iterables
            .getOnlyElement(client.describeVolumesInRegion(attachment.getRegion(), attachment.getVolumeId()));

    /*If attachment size is 0 volume is detached for sure.*/
    if (volume.getAttachments().size() == 0) {
        return true;
    }//from w  w  w . jav  a 2  s .  c om

    /* But if attachment size is > 0, then the attachment could be in any state. 
     * So we need to check if the status is DETACHED (return true) or not (return false). 
     */
    Attachment lastAttachment = Sets.newTreeSet(volume.getAttachments()).last();
    logger.trace("%s: looking for status %s: currently: %s", lastAttachment, Attachment.Status.DETACHED,
            lastAttachment.getStatus());
    return lastAttachment.getStatus() == Attachment.Status.DETACHED;
}

From source file:com.opengamma.financial.analytics.model.forex.forward.FXForwardMultiValuedFunction.java

@Override
public Set<ValueSpecification> getResults(final FunctionCompilationContext context,
        final ComputationTarget target, final Map<ValueSpecification, ValueRequirement> inputs) {
    String payCurveName = null;//  w  ww . ja va2s . co m
    String payCurveCalculationConfig = null;
    String receiveCurveName = null;
    String receiveCurveCalculationConfig = null;
    for (final Map.Entry<ValueSpecification, ValueRequirement> entry : inputs.entrySet()) {
        final ValueRequirement requirement = entry.getValue();
        if (requirement.getValueName().equals(ValueRequirementNames.YIELD_CURVE)) {
            final ValueProperties constraints = requirement.getConstraints();
            if (constraints.getProperties().contains(ValuePropertyNames.PAY_CURVE)) {
                payCurveName = Iterables.getOnlyElement(constraints.getValues(ValuePropertyNames.CURVE));
                payCurveCalculationConfig = Iterables
                        .getOnlyElement(constraints.getValues(ValuePropertyNames.CURVE_CALCULATION_CONFIG));
            } else if (constraints.getProperties().contains(ValuePropertyNames.RECEIVE_CURVE)) {
                receiveCurveName = Iterables.getOnlyElement(constraints.getValues(ValuePropertyNames.CURVE));
                receiveCurveCalculationConfig = Iterables
                        .getOnlyElement(constraints.getValues(ValuePropertyNames.CURVE_CALCULATION_CONFIG));
            }
        }
    }
    assert payCurveName != null;
    assert receiveCurveName != null;
    final ValueProperties properties = getResultProperties(target, payCurveName, receiveCurveName,
            payCurveCalculationConfig, receiveCurveCalculationConfig).get();
    return Collections
            .singleton(new ValueSpecification(getValueRequirementName(), target.toSpecification(), properties));
}

From source file:xml.entity.immutableelement.InternalElement.java

@Override
public ImmutableElement child(final String name) {
    final FluentIterable<ImmutableElement> collection = FluentIterable.from(children)
            .filter(ImmutableElements.byName(name));

    return Iterables.getOnlyElement(collection);
}

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

@Override
public Credentials apply(HttpResponse input) {
    Map<String, Credentials> returnVal = parser.apply(input);
    checkState(!(returnVal.size() > 1),
            "expecting only 1 credential in response, but had more: " + returnVal.keySet());
    return (returnVal.size() > 0) ? Iterables.getOnlyElement(returnVal.values()) : null;
}

From source file:org.eclipse.xtext.scoping.impl.MapBasedScope.java

/**
 * @since 2.3/* ww  w .  j  a  v  a2 s. c  o  m*/
 */
public static IScope createScope(IScope parent, Collection<IEObjectDescription> descriptions) {
    if (descriptions.size() == 1) {
        IEObjectDescription description = Iterables.getOnlyElement(descriptions);
        return new MapBasedScope(parent, Collections.singletonMap(description.getName(), description), false);
    } else if (descriptions.isEmpty()) {
        return parent;
    }
    return createScope(parent, descriptions, false);
}

From source file:org.apache.calcite.materialize.SqlLatticeStatisticProvider.java

@Override
public int cardinality(Lattice lattice, Lattice.Column column) {
    final String sql = lattice.countSql(ImmutableBitSet.of(column.ordinal));
    final Table table = new MaterializationService.DefaultTableFactory().createTable(lattice.rootSchema, sql,
            ImmutableList.<String>of());
    final Object[] values = Iterables.getOnlyElement(((ScannableTable) table).scan(null));
    return ((Number) values[0]).intValue();
}

From source file:com.opengamma.master.historicaltimeseries.impl.DefaultHistoricalTimeSeriesSelector.java

@Override
public ManageableHistoricalTimeSeriesInfo select(Collection<ManageableHistoricalTimeSeriesInfo> candidates,
        String selectionKey) {/*from w  w w .  j  a va  2  s .  c om*/
    selectionKey = Objects.firstNonNull(selectionKey, HistoricalTimeSeriesRatingFieldNames.DEFAULT_CONFIG_NAME);

    //IGN-139 - avoid rating unless we have to
    switch (candidates.size()) {
    case 0:
        return null;
    case 1:
        return Iterables.getOnlyElement(candidates);
    default:
        // Pick best using rules from configuration
        HistoricalTimeSeriesRating rating = _configSource.getLatestByName(HistoricalTimeSeriesRating.class,
                selectionKey);
        if (rating == null) {
            s_logger.warn("Resolver failed to find configuration: {}", selectionKey);
            return null;
        }
        return bestMatch(candidates, rating);
    }
}

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

@Override
public Entry<String, MessageIdAndMD5> getResult() {
    try {//  w ww.  j  a  v a  2 s .  c o m
        return Iterables.getOnlyElement(ImmutableMap.of(id, builder.build()).entrySet());
    } finally {
        builder = MessageIdAndMD5.builder();
    }
}

From source file:com.axemblr.provisionr.amazon.core.ImageTableQuery.java

public String singleResult() {
    final Map<String, String> filters = filtersBuilder.build();
    final ImmutableSet.Builder<String> builder = ImmutableSet.builder();

    for (String row : table.getTable().rowKeySet()) {
        if (matchesFilters(table.getTable().row(row), filters)) {
            builder.add(table.getTable().get(row, "ami-id"));
        }//from w ww . ja v a  2  s.co m
    }
    return Iterables.getOnlyElement(builder.build());
}