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.google.devtools.build.lib.analysis.actions.ExecutableSymlinkAction.java

@Override
public void execute(ActionExecutionContext actionExecutionContext) throws ActionExecutionException {
    Path inputPath = actionExecutionContext.getExecutor().getExecRoot().getRelative(getInputPath());
    try {/*from   w  ww .j  av  a2  s  . c  o m*/
        // Validate that input path is a file with the executable bit is set.
        if (!inputPath.isFile()) {
            throw new ActionExecutionException(
                    "'" + Iterables.getOnlyElement(getInputs()).prettyPrint() + "' is not a file", this, false);
        }
        if (!inputPath.isExecutable()) {
            throw new ActionExecutionException("failed to create symbolic link '"
                    + Iterables.getOnlyElement(getOutputs()).prettyPrint() + "': file '"
                    + Iterables.getOnlyElement(getInputs()).prettyPrint() + "' is not executable", this, false);
        }
    } catch (IOException e) {
        throw new ActionExecutionException("failed to create symbolic link '"
                + Iterables.getOnlyElement(getOutputs()).prettyPrint() + "' to the '"
                + Iterables.getOnlyElement(getInputs()).prettyPrint() + "' due to I/O error: " + e.getMessage(),
                e, this, false);
    }

    super.execute(actionExecutionContext);
}

From source file:com.opengamma.financial.analytics.model.forex.option.callspreadblack.FXDigitalCallSpreadBlackPresentValueFunction.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 PresentValueCallSpreadBlackForexCalculator calculator = new PresentValueCallSpreadBlackForexCalculator(
            spread);//from w w w  .  jav a 2 s  .  co  m
    final MultipleCurrencyAmount result = fxDigital.accept(calculator, data);
    final CurrencyAmount ca = result.getCurrencyAmounts()[0];
    final String expectedCurrency = spec.getProperty(ValuePropertyNames.CURRENCY);
    if (!expectedCurrency.equals(ca.getCurrency().getCode())) {
        throw new OpenGammaRuntimeException("Expected currency " + expectedCurrency
                + " does not equal result currency " + ca.getCurrency());
    }
    final double amount = ca.getAmount();
    return Collections.singleton(new ComputedValue(spec, amount));
}

From source file:org.jclouds.aws.ec2.binders.BindUserGroupsToIndexedFormParams.java

private void checkValidUserGroup(Object input) {
    Iterable<?> values = (Iterable<?>) input;
    long size = Iterables.size(values);
    checkArgument(size == 0 || (size == 1 && Iterables.getOnlyElement(values).equals("all")),
            "only supported UserGroup is 'all'");
}

From source file:com.opengamma.financial.analytics.model.forex.option.callspreadblack.FXDigitalCallSpreadBlackVegaPointFunction.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 PresentValueBlackVolatilitySensitivityCallSpreadBlackForexCalculator calculator = new PresentValueBlackVolatilitySensitivityCallSpreadBlackForexCalculator(
            spread);/*from ww w .ja  va 2s  .c om*/
    final PresentValueForexBlackVolatilitySensitivity result = fxDigital.accept(calculator, data);
    return Collections.singleton(new ComputedValue(spec, result));
}

From source file:org.atlasapi.remotesite.synd.PodcastGraphExtractor.java

protected Encoding encodingFrom(List<SyndEnclosure> enclosures) {
    Encoding encoding = new Encoding();

    SyndEnclosure enclosure = Iterables.getOnlyElement(enclosures);
    encoding.setDataSize(enclosure.getLength() / 1024);

    MimeType audioCoding = AudioFormat.fromAltName(enclosure.getType());
    if (audioCoding == MimeType.AUDIO_MPEG) {
        encoding.setAudioCoding(audioCoding);
    }// w w w .j a  v a 2  s. co  m
    MimeType videoCoding = VideoFormat.fromAltName(enclosure.getType());
    if (videoCoding == MimeType.VIDEO_MPEG) {
        encoding.setVideoCoding(videoCoding);
    }
    MimeType containerFormat = ContainerFormat.fromAltName(enclosure.getType());
    if (containerFormat != null) {
        encoding.setDataContainerFormat(containerFormat);
    } else {
        log.warn("unknownDataContainerFormat " + enclosure.getUrl() + " : " + enclosure.getType());
    }
    return encoding;
}

From source file:io.druid.sql.calcite.expression.UnarySuffixOperatorConversion.java

@Override
public DruidExpression toDruidExpression(final PlannerContext plannerContext, final RowSignature rowSignature,
        final RexNode rexNode) {
    return OperatorConversions.convertCall(plannerContext, rowSignature, rexNode,
            operands -> DruidExpression.fromExpression(StringUtils.format("(%s %s)",
                    Iterables.getOnlyElement(operands).getExpression(), druidOperator)));
}

From source file:io.prestosql.plugin.localfile.LocalFileRecordSet.java

public LocalFileRecordSet(LocalFileTables localFileTables, LocalFileSplit split,
        List<LocalFileColumnHandle> columns) {
    this.columns = requireNonNull(columns, "column handles is null");
    requireNonNull(split, "split is null");

    ImmutableList.Builder<Type> types = ImmutableList.builder();
    for (LocalFileColumnHandle column : columns) {
        types.add(column.getColumnType());
    }/*from   w  w w  .  j a  va  2s.  co  m*/
    this.columnTypes = types.build();
    this.address = Iterables.getOnlyElement(split.getAddresses());
    this.effectivePredicate = split.getEffectivePredicate();
    this.tableName = split.getTableName();

    this.localFileTables = requireNonNull(localFileTables, "localFileTables is null");
}

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

@SuppressWarnings("unchecked")
@Override//from   w  w  w.ja  va  2  s  .  com
public T apply(HttpResponse arg0) {
    Map<String, Map<String, T>> map = json.apply(arg0);
    if (map == null || map.size() == 0)
        return null;
    Map<String, T> map1 = Iterables.getOnlyElement(map.values());
    if (map1 == null || map1.size() == 0) {
        if (type.getRawType().isAssignableFrom(Set.class))
            return (T) ImmutableSet.of();
        else if (type.getRawType().isAssignableFrom(List.class))
            return (T) ImmutableList.of();
        else if (type.getRawType().isAssignableFrom(Map.class))
            return (T) ImmutableMap.of();
        return null;
    }
    return Iterables.getOnlyElement(map1.values());
}

From source file:io.druid.sql.calcite.expression.UnaryPrefixOperatorConversion.java

@Override
public DruidExpression toDruidExpression(final PlannerContext plannerContext, final RowSignature rowSignature,
        final RexNode rexNode) {
    return OperatorConversions.convertCall(plannerContext, rowSignature, rexNode,
            operands -> DruidExpression.fromExpression(StringUtils.format("(%s %s)", druidOperator,
                    Iterables.getOnlyElement(operands).getExpression())));
}

From source file:org.jclouds.ec2.compute.loaders.RegionAndIdToImage.java

@Override
public Image load(RegionAndName key) throws ExecutionException {
    try {//  w w w. ja va  2 s.  co m
        org.jclouds.ec2.domain.Image image = Iterables.getOnlyElement(
                sync.getAMIApi().get().describeImagesInRegion(key.getRegion(), imageIds(key.getName())));
        return parser.apply(image);
    } catch (Exception e) {
        throw new ExecutionException(message(key, e), e);
    }
}