Example usage for java.util.stream Collectors summingInt

Introduction

In this page you can find the example usage for java.util.stream Collectors summingInt.

Prototype

public static <T> Collector<T, ?, Integer> summingInt(ToIntFunction<? super T> mapper) 

Source Link

Document

Returns a Collector that produces the sum of a integer-valued function applied to the input elements.

Usage

From source file:Main.java

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

    int o = s.collect(Collectors.summingInt(n -> Integer.parseInt(n)));

    System.out.println(o);/*from   w  w  w.  j  a v a 2  s .c o  m*/
}

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From source file:Main.java

public static void main(String... args) {
    int o = Food.menu.stream().collect(Collectors.summingInt(Food::getCalories));
    System.out.println(o);/*  www  . j a  v a  2 s.c o  m*/

}

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From source file:Main.java

public static void main(String... args) {
    Map<Type, Integer> o = Food.menu.stream()
            .collect(Collectors.groupingBy(Food::getType, Collectors.summingInt(Food::getCalories)));

    System.out.println(o);/*  w ww .  j  av  a  2 s .  c  o m*/

}

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From source file:net.thirdy.blackmarket.service.Ladder.java

public int size() {
    return ladderMapAllLeagues.entrySet().stream().map(es -> es.getValue().size())
            .collect(Collectors.summingInt(size -> size));
}

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From source file:com.epam.ta.reportportal.core.widget.content.BugTrendChartContentLoader.java

/**
 * Calculate issues count for specified test item.<br>
 * Following series are supposed to be:<br>
 * - statistics.issueCounter.toInvestigate<br>
 * - statistics.issueCounter.productBugs<br>
 * - statistics.issueCounter.testBugs<br>
 * - statistics.issueCounter.systemIssues
 * //w w  w  .ja va2 s  .c o m
 * @param single
 * @return
 */
private static Integer getIssuesCount(ChartObject single) {
    return single.getValues().values().stream().collect(Collectors.summingInt(Integer::parseInt));
}

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From source file:uk.co.jassoft.markets.api.SentimentController.java

@PreAuthorize("permitAll")
@RequestMapping(value = "company/{id}/story/{storyId}", method = RequestMethod.GET)
public @ResponseBody CompanyStorySentiment getCompanyStorySentiment(final HttpServletResponse response,
        @PathVariable String id, @PathVariable String storyId) throws UnknownHostException {
    List<StorySentiment> storySentiments = storySentimentRepository.findByCompany(id);

    Integer sentiment = null;/*from w w w .j  a  va  2s . co m*/

    // This can sometimes be null if the 1st story matched to a company hasnt yet been sentiment analysed
    if (storySentiments != null) {
        sentiment = storySentiments.stream()
                .map(storySentiment -> storySentiment.getEntitySentiment().stream()
                        .collect(Collectors.summingInt(EntitySentiment::getSentiment)))
                .collect(Collectors.summingInt(value -> value));
    }

    response.setHeader("Cache-Control", "max-age=" + CacheTimeout.TWENTY_FOUR_HOURS);
    return new CompanyStorySentiment(id, storyId, sentiment);
}

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From source file:uk.co.jassoft.markets.api.SentimentController.java

@PreAuthorize("permitAll")
@RequestMapping(value = "company/{id}/period/{period}", method = RequestMethod.GET)
public @ResponseBody List<SentimentByDate> getSentimentsByCompany(final HttpServletResponse response,
        @PathVariable String id, @PathVariable PeriodType period) {

    // This could do some mongoDB magic to only select the StorySentiments in the date
    List<StorySentiment> storySentiments = storySentimentRepository.findByCompany(id);

    List<SentimentByDate> companySentiments = storySentiments.stream()
            .sorted((s1, s2) -> s1.getStoryDate().compareTo(s2.getStoryDate()))
            .map(storySentiment -> new SentimentByDate(id, storySentiment.getStoryDate(),
                    storySentiment.getEntitySentiment().stream()
                            .collect(Collectors.summingInt(value -> value.getSentiment()))))
            .collect(Collectors.groupingBy(
                    sentimentByDate -> getTrincatedDate(period, sentimentByDate.getDate()),
                    Collectors.summingInt(value1 -> value1.getSentiment())))
            .entrySet().stream()/*  w  w  w  .j  a  va2s .  com*/
            .map(dateIntegerEntry -> new SentimentByDate(id, dateIntegerEntry.getKey(),
                    dateIntegerEntry.getValue()))
            .sorted((o1, o2) -> o1.getDate().compareTo(o2.getDate())).collect(Collectors.toList());

    response.setHeader("Cache-Control", "max-age=" + CacheTimeout.FIFTEEN_MINUTES);
    return companySentiments;
}

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From source file:org.perfcake.examples.weaver.Weaver.java

/**
 * Initializes the configuration.//  w  w  w  .ja va 2 s .  co m
 *
 * @throws IOException
 *       When it was not possible to parse the configuration.
 */
public void init() throws IOException {
    int maxThreads = Files.lines(Paths.get(config)).collect(Collectors.summingInt(this::parseWorker));
    if (threads > maxThreads || threads == 0) {
        if (threads > maxThreads) {
            log.warn("Maximum possible threads is " + maxThreads + ", while you requested " + threads
                    + ". Using " + maxThreads + ".");
        }
        threads = maxThreads;
    }

    if (shuffle) {
        log.info("Shuffling workers...");

        final List<Worker> workersList = workers.stream().collect(Collectors.toList());
        Collections.shuffle(workersList);
        workers.clear();
        workersList.forEach(workers::offer);
    }

    log.info("Creating executor with " + threads + " threads.");

    executor = new ThreadPoolExecutor(threads, threads, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<>(),
            new ThreadFactoryBuilder().setDaemon(true).setNameFormat("worker-thread-%d").build());
}

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From source file:org.trustedanalytics.metricsprovider.rest.MetricsDownloadTasks.java

public CompletableFuture<SpaceMetrics> getSpaceMetricsSingle(UUID space) {

    return getSpaceSummary(space).thenApply(response -> {

        Map<Boolean, List<CfApp>> apps = response.getApps().stream().collect(partitioningBy(CfApp::isStarted));

        int routesCount = response.getApps().stream().map(app -> app.getUrls().size())
                .collect(Collectors.summingInt(i -> i));

        int servicesCount = response.getServiceInstances().size();

        return new SpaceMetrics(apps.get(true).size(), apps.get(false).size(), routesCount, servicesCount);
    });//from w  ww .j  a v a 2s.c  om
}

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From source file:hr.diskobolos.persistence.impl.EvaluationAnswerPersistenceImpl.java

@Override
public Map<MemberRegister, Integer> fetchTotalPointsPerMemberRegister(QuestionnaireType questionnaireType) {
    CriteriaBuilder cb = entityManager.getCriteriaBuilder();
    CriteriaQuery<Tuple> cq = cb.createTupleQuery();
    Root<EvaluationAnswer> evaluationAnswer = cq.from(EvaluationAnswer.class);
    Join<EvaluationAnswer, QuestionChoicesDef> choiceDef = evaluationAnswer.join(EvaluationAnswer_.answer);
    Join<QuestionChoicesDef, EvaluationQuestionDef> questionDef = choiceDef
            .join(QuestionChoicesDef_.evaluationQuestionDef);
    ParameterExpression<QuestionnaireType> questionnaireTypeParam = cb.parameter(QuestionnaireType.class,
            "questionnaireType");
    Expression<Integer> value = evaluationAnswer.get(EvaluationAnswer_.answer).get(QuestionChoicesDef_.value)
            .as(Integer.class);
    cq.multiselect(evaluationAnswer.get(EvaluationAnswer_.memberRegister).alias("memberRegister"),
            value.alias("value"));
    cq.where(cb.equal(questionDef.get(EvaluationQuestionDef_.questionnaireType), questionnaireTypeParam));
    TypedQuery<Tuple> query = entityManager.createQuery(cq);
    query.setParameter("questionnaireType", questionnaireType);
    List<Tuple> result = query.getResultList();
    Map<MemberRegister, Integer> pointsPerMemberRegister = result.stream().collect(Collectors.groupingBy(t -> {
        return t.get("memberRegister", MemberRegister.class);
    }, Collectors.summingInt(t -> t.get("value", Integer.class))));

    return pointsPerMemberRegister;
}

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