Example usage for com.google.common.collect ImmutableList isEmpty

Introduction

In this page you can find the example usage for com.google.common.collect ImmutableList isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this list contains no elements.

Usage

From source file:com.google.jimfs.FileTree.java

private static boolean isEmpty(ImmutableList<Name> names) {
    // the empty path (created by FileSystem.getPath("")), has no root and a single name, ""
    return names.isEmpty() || names.size() == 1 && names.get(0).toString().isEmpty();
}

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From source file:com.facebook.buck.apple.toolchain.impl.AppleSdkDiscovery.java

private static ImmutableList<String> validArchitecturesForPlatform(ApplePlatform platform, Path sdkDir)
        throws IOException {
    ImmutableList<String> architectures = platform.getArchitectures();
    try (DirectoryStream<Path> sdkFiles = Files.newDirectoryStream(sdkDir)) {
        ImmutableList.Builder<String> architectureSubdirsBuilder = ImmutableList.builder();
        for (Path path : sdkFiles) {
            if (Files.isDirectory(path)) {
                String directoryName = path.getFileName().toString();
                // Default Apple SDKs contain fat binaries and have no architecture subdirectories,
                // but custom SDKs might.
                if (architectures.contains(directoryName)) {
                    architectureSubdirsBuilder.add(directoryName);
                }//ww  w . j  a v  a 2 s.  c  o m
            }
        }

        ImmutableList<String> architectureSubdirs = architectureSubdirsBuilder.build();
        if (!architectureSubdirs.isEmpty()) {
            architectures = architectureSubdirs;
        }
    }
    return architectures;
}

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From source file:cz.cuni.mff.ms.brodecva.botnicek.ide.translate.Stack.java

/**
 * Vrt strukturu, kter pid slova na uvolnn vrchol zsobnku, pokud je
 * provedena./*  ww w.  j a  v  a 2  s .c o m*/
 * 
 * @param words
 *            normln slova
 * @return strom prvk ablony, kter provede pidn slov na zsobnk
 */
public static TemplateElement popAndPushWords(final List<? extends NormalWord> words) {
    Preconditions.checkNotNull(words);

    final ImmutableList<NormalWord> wordsCopy = ImmutableList.copyOf(words);

    if (wordsCopy.isEmpty()) {
        return popAndPush(ImmutableList.<TemplateElement>of());
    } else {
        return popAndPush(Text.create(joinWithSpaces(wordsCopy)));
    }
}

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From source file:com.facebook.buck.android.exopackage.RealExopackageDevice.java

/**
 * Breaks a list of strings into groups whose total size is within some limit. Kind of like the
 * xargs command that groups arguments to avoid maximum argument length limits. Except that the
 * limit in adb is about 1k instead of 512k or 2M on Linux.
 *///from www. jav  a  2s .com
@VisibleForTesting
public static ImmutableList<ImmutableList<String>> chunkArgs(Iterable<String> args, int sizeLimit) {
    ImmutableList.Builder<ImmutableList<String>> topLevelBuilder = ImmutableList.builder();
    ImmutableList.Builder<String> chunkBuilder = ImmutableList.builder();
    int chunkSize = 0;
    for (String arg : args) {
        if (chunkSize + arg.length() > sizeLimit) {
            topLevelBuilder.add(chunkBuilder.build());
            chunkBuilder = ImmutableList.builder();
            chunkSize = 0;
        }
        // We don't check for an individual arg greater than the limit.
        // We just put it in its own chunk and hope for the best.
        chunkBuilder.add(arg);
        chunkSize += arg.length();
    }
    ImmutableList<String> tail = chunkBuilder.build();
    if (!tail.isEmpty()) {
        topLevelBuilder.add(tail);
    }
    return topLevelBuilder.build();
}

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From source file:dagger.internal.codegen.SourceFiles.java

static TypeName parameterizedGeneratedTypeNameForBinding(Binding binding) {
    ClassName className = generatedClassNameForBinding(binding);
    ImmutableList<TypeVariableName> typeParameters = bindingTypeElementTypeVariableNames(binding);
    return typeParameters.isEmpty() ? className
            : ParameterizedTypeName.get(className, Iterables.toArray(typeParameters, TypeName.class));
}

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From source file:com.opengamma.strata.loader.csv.SwapTradeCsvLoader.java

private static SwapTrade parseVariableRates(SwapTrade trade, List<CsvRow> variableRows) {
    ImmutableList.Builder<ValueStep> stepBuilder = ImmutableList.builder();
    for (CsvRow row : variableRows) {
        LocalDate date = LoaderUtils.parseDate(row.getValue(START_DATE_FIELD));
        row.findValue(FIXED_RATE_FIELD).map(str -> LoaderUtils.parseDoublePercent(str)).ifPresent(
                fixedRate -> stepBuilder.add(ValueStep.of(date, ValueAdjustment.ofReplace(fixedRate))));
    }/*from   w  ww. j  a  va2  s .  c o m*/
    ImmutableList<ValueStep> varRates = stepBuilder.build();
    if (varRates.isEmpty()) {
        return trade;
    }
    // adjust the trade, inserting the variable rates
    ImmutableList.Builder<SwapLeg> legBuilder = ImmutableList.builder();
    for (SwapLeg swapLeg : trade.getProduct().getLegs()) {
        RateCalculationSwapLeg leg = (RateCalculationSwapLeg) swapLeg;
        if (leg.getCalculation() instanceof FixedRateCalculation) {
            FixedRateCalculation baseCalc = (FixedRateCalculation) leg.getCalculation();
            FixedRateCalculation calc = baseCalc.toBuilder()
                    .rate(ValueSchedule.of(baseCalc.getRate().getInitialValue(), varRates)).build();
            legBuilder.add(leg.toBuilder().calculation(calc).build());
        } else {
            legBuilder.add(leg);
        }
    }
    return replaceLegs(trade, legBuilder.build());
}

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From source file:com.opengamma.strata.loader.csv.SwapTradeCsvLoader.java

private static SwapTrade parseVariableNotional(SwapTrade trade, List<CsvRow> variableRows) {
    // parse notionals
    ImmutableList.Builder<ValueStep> stepBuilder = ImmutableList.builder();
    for (CsvRow row : variableRows) {
        LocalDate date = LoaderUtils.parseDate(row.getValue(START_DATE_FIELD));
        row.findValue(NOTIONAL_FIELD).map(str -> LoaderUtils.parseDouble(str)).ifPresent(
                notional -> stepBuilder.add(ValueStep.of(date, ValueAdjustment.ofReplace(notional))));
    }/*from ww  w.  ja  v  a2 s. c om*/
    ImmutableList<ValueStep> varNotionals = stepBuilder.build();
    if (varNotionals.isEmpty()) {
        return trade;
    }
    // adjust the trade, inserting the variable notionals
    ImmutableList.Builder<SwapLeg> legBuilder = ImmutableList.builder();
    for (SwapLeg swapLeg : trade.getProduct().getLegs()) {
        RateCalculationSwapLeg leg = (RateCalculationSwapLeg) swapLeg;
        NotionalSchedule notionalSchedule = leg.getNotionalSchedule().toBuilder()
                .amount(ValueSchedule.of(leg.getNotionalSchedule().getAmount().getInitialValue(), varNotionals))
                .build();
        legBuilder.add(leg.toBuilder().notionalSchedule(notionalSchedule).build());
    }
    return replaceLegs(trade, legBuilder.build());
}

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From source file:com.opengamma.strata.collect.io.XmlFile.java

/**
 * Parses the tree from the StAX stream reader, capturing references.
 * <p>/*from  www. j  a va2 s.co m*/
 * The reader should be created using the factory returned from {@link #xmlInputFactory()}.
 * <p>
 * This method supports capturing attribute references, such as an id/href pair.
 * Wherever the parser finds an attribute with the specified name, the element is added
 * to the specified map. Note that the map is mutated.
 * 
 * @param reader  the StAX stream reader, positioned at or before the element to be parsed
 * @param refAttr  the attribute name that should be parsed as a reference, null if not applicable
 * @param refs  the mutable map of references to update, null if not applicable
 * @return the parsed element
 * @throws IllegalArgumentException if the input cannot be parsed
 */
private static XmlElement parse(XMLStreamReader reader, String refAttr, Map<String, XmlElement> refs) {
    try {
        // parse start element
        String elementName = parseElementName(reader);
        ImmutableMap<String, String> attrs = parseAttributes(reader);

        // parse children or content
        ImmutableList.Builder<XmlElement> childBuilder = ImmutableList.builder();
        String content = "";
        int event = reader.next();
        while (event != XMLStreamConstants.END_ELEMENT) {
            switch (event) {
            // parse child when start element found
            case XMLStreamConstants.START_ELEMENT:
                childBuilder.add(parse(reader, refAttr, refs));
                break;
            // append content when characters found
            // since XMLStreamReader has IS_COALESCING=true means there should only be one content call
            case XMLStreamConstants.CHARACTERS:
            case XMLStreamConstants.CDATA:
                content += reader.getText();
                break;
            default:
                break;
            }
            event = reader.next();
        }
        ImmutableList<XmlElement> children = childBuilder.build();
        XmlElement parsed = children.isEmpty() ? XmlElement.ofContent(elementName, attrs, content)
                : XmlElement.ofChildren(elementName, attrs, children);
        String ref = attrs.get(refAttr);
        if (ref != null) {
            refs.put(ref, parsed);
        }
        return parsed;

    } catch (XMLStreamException ex) {
        throw new IllegalArgumentException(ex);
    }
}

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From source file:org.eigenbase.relopt.RelOptPredicateList.java

public static RelOptPredicateList of(Iterable<RexNode> pulledUpPredicates,
        Iterable<RexNode> leftInferredPredicates, Iterable<RexNode> rightInferredPredicates) {
    final ImmutableList<RexNode> pulledUpPredicatesList = ImmutableList.copyOf(pulledUpPredicates);
    final ImmutableList<RexNode> leftInferredPredicateList = ImmutableList.copyOf(leftInferredPredicates);
    final ImmutableList<RexNode> rightInferredPredicatesList = ImmutableList.copyOf(rightInferredPredicates);
    if (pulledUpPredicatesList.isEmpty() && leftInferredPredicateList.isEmpty()
            && rightInferredPredicatesList.isEmpty()) {
        return EMPTY;
    }/*from  w  ww. j  a v  a  2 s  .c  o m*/
    return new RelOptPredicateList(pulledUpPredicatesList, leftInferredPredicateList,
            rightInferredPredicatesList);
}

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From source file:com.isotrol.impe3.api.content.ContentCriteriaTransformer.java

/**
 * Transformer to adds a set of sort specifications.
 * @param fields Sort field specifications.
 * @return The requested transformer.// w w w . j  a v  a  2  s  . co  m
 */
public static ContentCriteriaTransformer sort(Iterable<NRSortField> fields) {
    if (fields == null) {
        return identity();
    }
    final ImmutableList<NRSortField> list = ImmutableList.copyOf(filter(fields, notNull()));
    if (list.isEmpty()) {
        return identity();
    }
    return new AddSort(list);
}

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