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

List of usage examples for com.google.common.collect Iterables getOnlyElement

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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:brooklyn.entity.software.mysql.DynamicToyMySqlEntityBuilder.java

public static String getOsTag(Entity e) {
    // e.g. "osx10.6-x86_64"; see http://www.mysql.com/downloads/mysql/#downloads
    OsDetails os = ((SshMachineLocation) Iterables.getOnlyElement(e.getLocations())).getOsDetails();
    if (os == null)
        return "linux2.6-i686";
    if (os.isMac()) {
        String osp1 = os.getVersion() == null ? "osx10.5" //lowest common denominator
                : new ComparableVersion(os.getVersion()).isGreaterThanOrEqualTo(OsVersions.MAC_10_6) ? "osx10.6"
                        : new ComparableVersion(os.getVersion()).isGreaterThanOrEqualTo(OsVersions.MAC_10_5)
                                ? "osx10.5"
                                : "osx10.5"; //lowest common denominator
        String osp2 = os.is64bit() ? "x86_64" : "x86";
        return osp1 + "-" + osp2;
    }// ww w.  j  a va 2  s.co m
    //assume generic linux
    String osp1 = "linux2.6";
    String osp2 = os.is64bit() ? "x86_64" : "i686";
    return osp1 + "-" + osp2;
}

From source file:at.ac.univie.isc.asio.CaptureEvents.java

/**
 * Get the single captured event of the expected type. Fails fast if more than one event was
 * captured.
 */
public EVENT single() {
    return Iterables.getOnlyElement(captured());
}

From source file:org.apache.flex.compiler.internal.definitions.references.ResolvedQualifiersReference.java

@Override
public IDefinition resolve(ICompilerProject project, ASScope scope, DependencyType dependencyType,
        boolean canEscapeWith) {
    if (qualifiers.size() == 1) {
        INamespaceDefinition qualifier = Iterables.getOnlyElement(qualifiers);
        return scope.findPropertyQualified(project, qualifier, getName(), dependencyType, canEscapeWith);
    }/*from  www.j  ava 2 s  .  co m*/

    return ((CompilerProject) project).getCacheForScope(scope).findPropertyMultiname(this, dependencyType);
}

From source file:com.opengamma.financial.analytics.model.hullwhitediscounting.HullWhiteDiscountingPVFunction.java

@Override
public CompiledFunctionDefinition compile(final FunctionCompilationContext context, final Instant atInstant) {
    return new HullWhiteCompiledFunction(getTargetToDefinitionConverter(context),
            getDefinitionToDerivativeConverter(context), true) {

        @Override//from w ww. j a v  a2 s. co  m
        protected Set<ComputedValue> getValues(final FunctionExecutionContext executionContext,
                final FunctionInputs inputs, final ComputationTarget target,
                final Set<ValueRequirement> desiredValues, final InstrumentDerivative derivative,
                final FXMatrix fxMatrix) {
            final HullWhiteOneFactorProviderInterface data = getMergedProviders(inputs, fxMatrix);
            final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
            final ValueProperties properties = desiredValue.getConstraints().copy().get();
            final Currency currency = FinancialSecurityUtils.getCurrency(target.getTrade().getSecurity());
            final MultipleCurrencyAmount mca = derivative.accept(CALCULATOR, data);
            final ValueSpecification spec = new ValueSpecification(PRESENT_VALUE, target.toSpecification(),
                    properties);
            return Collections.singleton(new ComputedValue(spec, mca.getAmount(currency)));
        }
    };
}

From source file:org.apache.shindig.social.opensocial.service.AlbumHandler.java

@Operation(httpMethods = "POST", bodyParam = "album")
public Future<?> create(SocialRequestItem request) throws ProtocolException {
    // Retrieve userIds and albumIds
    Set<UserId> userIds = request.getUsers();
    List<String> albumIds = request.getListParameter("albumId");

    // Preconditions - exactly one userId specified, no albumIds specified
    HandlerPreconditions.requireNotEmpty(userIds, "No userId specified");
    HandlerPreconditions.requireSingular(userIds, "Multiple userIds not supported");
    HandlerPreconditions.requireEmpty(albumIds, "Cannot specify albumId in create");

    return service.createAlbum(Iterables.getOnlyElement(userIds), request.getAppId(),
            request.getTypedParameter("album", Album.class), request.getToken());
}

From source file:com.opengamma.financial.analytics.model.black.BlackDiscountingWeightedVegaIRFutureOptionFunction.java

@Override
public CompiledFunctionDefinition compile(final FunctionCompilationContext context, final Instant atInstant) {
    return new BlackDiscountingCompiledFunction(getTargetToDefinitionConverter(context),
            getDefinitionToDerivativeConverter(context), true) {

        @Override/* w w w  .  j  a va2 s  .co  m*/
        protected Set<ComputedValue> getValues(final FunctionExecutionContext executionContext,
                final FunctionInputs inputs, final ComputationTarget target,
                final Set<ValueRequirement> desiredValues, final InstrumentDerivative derivative,
                final FXMatrix fxMatrix) {
            final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
            final ValueProperties constraints = desiredValue.getConstraints();
            final Set<String> baseDayProperty = constraints.getValues(PROPERTY_BASE_DAYS);
            final ValueProperties.Builder resultConstraints = constraints.copy();
            final double baseDays;
            if (baseDayProperty.size() == 1) {
                baseDays = Double.parseDouble(Iterables.getOnlyElement(baseDayProperty));
                resultConstraints.with(PROPERTY_BASE_DAYS, baseDayProperty);
            } else {
                baseDays = DEFAULT_BASE_DAYS;
                resultConstraints.with(PROPERTY_BASE_DAYS, Double.toString(DEFAULT_BASE_DAYS));
            }
            final double positionVega = (Double) inputs.getValue(POSITION_VEGA);
            final IRFutureOptionSecurity security = (IRFutureOptionSecurity) target.getTrade().getSecurity();
            final Expiry expiry = security.getExpiry();
            if (expiry.getAccuracy().equals(ExpiryAccuracy.MONTH_YEAR)
                    || expiry.getAccuracy().equals(ExpiryAccuracy.YEAR)) {
                throw new OpenGammaRuntimeException(
                        "Security's expiry is not accurate to the day, which is required: "
                                + security.toString());
            }
            final long daysToExpiry = ChronoUnit.DAYS.between(
                    LocalDate.now(executionContext.getValuationClock()), expiry.getExpiry().toLocalDate());
            final double weighting = Math.sqrt(baseDays / Math.max(daysToExpiry, 1.0));
            final double weightedVega = weighting * positionVega;
            final ValueSpecification valueSpecification = new ValueSpecification(POSITION_WEIGHTED_VEGA,
                    target.toSpecification(), resultConstraints.get());
            final ComputedValue result = new ComputedValue(valueSpecification, weightedVega);
            return Sets.newHashSet(result);
        }

        @Override
        public Set<ValueRequirement> getRequirements(final FunctionCompilationContext compilationContext,
                final ComputationTarget target, final ValueRequirement desiredValue) {
            if (super.getRequirements(compilationContext, target, desiredValue) == null) {
                return null;
            }
            final ValueProperties properties = desiredValue.getConstraints();
            return Collections.singleton(
                    new ValueRequirement(POSITION_VEGA, target.toSpecification(), properties.copy().get()));
        }

        @Override
        protected ValueProperties.Builder getResultProperties(
                final FunctionCompilationContext compilationContext, final ComputationTarget target) {
            final ValueProperties.Builder properties = super.getResultProperties(compilationContext, target);
            return properties.withAny(PROPERTY_BASE_DAYS);
        }
    };
}

From source file:com.opengamma.financial.analytics.model.hullwhitediscounting.HullWhiteMarketQuoteFunction.java

@Override
public CompiledFunctionDefinition compile(final FunctionCompilationContext context, final Instant atInstant) {
    return new HullWhiteCompiledFunction(getTargetToDefinitionConverter(context),
            getDefinitionToDerivativeConverter(context), false) {

        @Override//w w w .j  a va 2 s .c o m
        protected Set<ComputedValue> getValues(final FunctionExecutionContext executionContext,
                final FunctionInputs inputs, final ComputationTarget target,
                final Set<ValueRequirement> desiredValues, final InstrumentDerivative derivative,
                final FXMatrix fxMatrix) {
            final HullWhiteOneFactorProviderInterface data = getMergedProviders(inputs, fxMatrix);
            final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
            final double marketQuote = derivative.accept(CALCULATOR, data);
            final ValueProperties properties = desiredValue.getConstraints().copy().get();
            final ValueSpecification spec = new ValueSpecification(MARKET_QUOTE, target.toSpecification(),
                    properties);
            return Collections.singleton(new ComputedValue(spec, marketQuote));
        }

        @Override
        public boolean canApplyTo(final FunctionCompilationContext compilationContext,
                final ComputationTarget target) {
            final Security security = target.getTrade().getSecurity();
            return security instanceof DeliverableSwapFutureSecurity
                    || security instanceof InterestRateFutureSecurity;
        }

    };
}

From source file:org.obm.icalendar.ical4jwrapper.ICalendarRecur.java

public Integer byMonth() {
    Collection<Integer> monthList = recur.getMonthList();
    if (monthList != null && !monthList.isEmpty()) {
        return Iterables.getOnlyElement(monthList);
    }/*from   ww  w .ja  va2 s  .  co  m*/
    return null;
}

From source file:io.druid.segment.filter.ExpressionFilter.java

@Override
public boolean supportsBitmapIndex(final BitmapIndexSelector selector) {
    if (requiredBindings.isEmpty()) {
        // Constant expression.
        return true;
    } else if (requiredBindings.size() == 1) {
        // Single-column expression. We can use bitmap indexes if this column has an index and does not have
        // multiple values. The lack of multiple values is important because expression filters treat multi-value
        // arrays as nulls, which doesn't permit index based filtering.
        final String column = Iterables.getOnlyElement(requiredBindings);
        return selector.getBitmapIndex(column) != null && !selector.hasMultipleValues(column);
    } else {//from   w  ww  .j  a  v  a  2s  . com
        // Multi-column expression.
        return false;
    }
}

From source file:com.opengamma.financial.analytics.model.black.BlackDiscountingSpotDeltaFXOptionFunction.java

@Override
public CompiledFunctionDefinition compile(final FunctionCompilationContext context, final Instant atInstant) {
    return new BlackDiscountingCompiledFunction(getTargetToDefinitionConverter(context),
            getDefinitionToDerivativeConverter(context), false) {

        @Override/*ww  w .jav  a 2 s.  co m*/
        protected Set<ComputedValue> getValues(final FunctionExecutionContext executionContext,
                final FunctionInputs inputs, final ComputationTarget target,
                final Set<ValueRequirement> desiredValues, final InstrumentDerivative derivative,
                final FXMatrix fxMatrix) {
            final BlackForexSmileProvider blackData = getBlackSurface(executionContext, inputs, target,
                    fxMatrix);
            final double delta = derivative.accept(CALCULATOR, blackData);
            final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
            final ValueProperties properties = desiredValue.getConstraints().copy().get();
            final ValueSpecification spec = new ValueSpecification(DELTA, target.toSpecification(), properties);
            return Collections.singleton(new ComputedValue(spec, delta));
        }

    };
}