Example usage for java.util.stream Collectors maxBy

Usage

From source file:Main.java

public static void main(String[] args) {
    Stream<String> s = Stream.of("1", "2", "3");

    Optional<String> o = s.collect(Collectors.maxBy(Comparator.reverseOrder()));

    if (o.isPresent()) {
        System.out.println(o.get());
    } else {//from w w  w .ja va  2  s  .co m
        System.out.println("no value");
    }

}

From source file:Main.java

public static void main(String... args) {
    Map<Boolean, Food> o = Food.menu.stream().collect(Collectors.partitioningBy(Food::isVegetarian, Collectors
            .collectingAndThen(Collectors.maxBy(Comparator.comparingInt(Food::getCalories)), Optional::get)));
    System.out.println(o);//from   w  w  w.  j  a  v a2  s  . com

}

From source file:delfos.rs.trustbased.WeightedGraph.java

public boolean hasAnyEdge() {
    Optional<PathBetweenNodes<Node>> longestPath = allNodes().parallelStream()
            .flatMap(user1 -> allNodes().parallelStream().map(user2 -> shortestPath(user1, user2)))
            .filter(optionalPath -> optionalPath.isPresent()).map(optionalPath -> optionalPath.get())
            .filter(path -> !path.isSelf()).collect(Collectors.maxBy(PathBetweenNodes.FURTHEST_PATH()));

    return longestPath.isPresent();
}

From source file:com.formkiq.core.service.generator.pdfbox.PdfEditorServiceImpl.java

/**
 * Remove {@link PdfFieldMatch} {@link PdfTextFieldMatch} that occur in
 * the {@link PdAnnotationWidgetMatch}.//from   w  w w.  j av a 2  s .c o  m
 *
 * @param fm {@link PdfFieldMatch}
 */
private void updatePDCheckBoxPdfTextFieldMatch(final PdfFieldMatch fm) {

    Optional<Float> maxX = fm.getWidgets().stream()
            .map(s -> Float.valueOf(s.getWidget().getRectangle().getUpperRightX()))
            .collect(Collectors.maxBy(Float::compareTo));

    List<PdfTextFieldMatch> list = fm.getWidgets().stream().flatMap(s -> s.getMatches().stream())
            .collect(Collectors.toList());

    Set<PdfTextField> set = list.stream().map(s -> s.getTextField()).collect(Collectors.toSet());

    Iterator<PdfTextFieldMatch> itr = fm.getMatches().iterator();
    while (itr.hasNext()) {
        PdfTextFieldMatch m = itr.next();

        if (m.getMatch() < 0 || set.contains(m.getTextField())) {
            itr.remove();
        } else if (maxX.isPresent()) {
            if (maxX.get().floatValue() < m.getTextField().getRectangle().getLowerLeftX()) {
                itr.remove();
            }
        }
    }

    Collections.sort(list, this.matchComparator);
}

From source file:org.apache.james.blob.cassandra.CassandraBlobsDAO.java

private Mono<Integer> saveBlobParts(byte[] data, BlobId blobId) {
    Stream<Pair<Integer, ByteBuffer>> chunks = dataChunker.chunk(data, configuration.getBlobPartSize());
    return Flux.fromStream(chunks).publishOn(Schedulers.elastic(), PREFETCH)
            .flatMap(pair -> writePart(pair.getValue(), blobId, getChunkNum(pair)))
            .collect(Collectors.maxBy(Comparator.comparingInt(x -> x))).flatMap(Mono::justOrEmpty)
            .map(this::numToCount).defaultIfEmpty(0);
}

From source file:org.opencb.commons.utils.CommandLineUtils.java

public static void printCommandUsage(JCommander commander, PrintStream printStream) {

    Integer paramNameMaxSize = Math.max(commander.getParameters().stream().map(pd -> pd.getNames().length())
            .collect(Collectors.maxBy(Comparator.naturalOrder())).orElse(20), 20);
    Integer typeMaxSize = Math.max(commander.getParameters().stream().map(pd -> getType(pd).length())
            .collect(Collectors.maxBy(Comparator.naturalOrder())).orElse(10), 10);

    int nameAndTypeLength = paramNameMaxSize + typeMaxSize + 8;
    int maxLineLength = nameAndTypeLength + DESCRIPTION_LENGTH; //160

    Comparator<ParameterDescription> parameterDescriptionComparator = Comparator
            .comparing((ParameterDescription p) -> p.getDescription().contains("DEPRECATED"))
            .thenComparing(ParameterDescription::getLongestName);
    commander.getParameters().stream().sorted(parameterDescriptionComparator).forEach(parameterDescription -> {
        if (parameterDescription.getParameter() != null && !parameterDescription.getParameter().hidden()) {
            String type = getType(parameterDescription);
            String defaultValue = "";
            if (parameterDescription.getDefault() != null) {
                if (parameterDescription.isDynamicParameter()) {
                    Object def = parameterDescription.getDefault();
                    if (def instanceof Map && !((Map) def).isEmpty()) {
                        defaultValue = " [" + def + "]";
                    }// w w w . ja v a2 s  .  c om
                } else {
                    defaultValue = " [" + parameterDescription.getDefault() + "]";
                }
            }
            String usage = String.format("%5s %-" + paramNameMaxSize + "s %-" + typeMaxSize + "s %s%s\n",
                    (parameterDescription.getParameterized().getParameter() != null
                            && parameterDescription.getParameterized().getParameter().required()) ? "*" : "",
                    parameterDescription.getNames(), type, parameterDescription.getDescription(), defaultValue);

            // if lines are longer than the maximum they are trimmed and printed in several lines
            List<String> lines = new LinkedList<>();
            while (usage.length() > maxLineLength + 1) {
                int splitPosition = Math.min(1 + usage.lastIndexOf(" ", maxLineLength), usage.length());
                if (splitPosition <= nameAndTypeLength + DESCRIPTION_INDENT) {
                    splitPosition = Math.min(1 + usage.indexOf(" ", maxLineLength), usage.length());
                }
                lines.add(usage.substring(0, splitPosition) + "\n");
                usage = String.format("%" + (nameAndTypeLength + DESCRIPTION_INDENT) + "s", "") + ""
                        + usage.substring(splitPosition);
            }
            // this is empty for short lines and so no prints anything
            lines.forEach(printStream::print);
            // in long lines this prints the last trimmed line
            printStream.print(usage);
        }
    });
}

From source file:org.opensingular.form.wicket.SValidationFeedbackHandler.java

public Optional<ValidationErrorLevel> findNestedErrorsMaxLevel(FeedbackFence feedbackFence,
        IPredicate<IValidationError> filter) {
    return collectNestedErrors(feedbackFence, resolveRootInstances(feedbackFence.getMainContainer()), filter)
            .stream().map(IValidationError::getErrorLevel).collect(Collectors.maxBy(Comparator.naturalOrder()));
}