Example usage for java.util Collections nCopies

Introduction

In this page you can find the example usage for java.util Collections nCopies.

Prototype

public static <T> List<T> nCopies(int n, T o) 

Source Link

Document

Returns an immutable list consisting of n copies of the specified object.

Usage

From source file:de.xwic.appkit.core.model.queries.resolver.hbn.PropertyQueryTest.java

/**
 *
 *//*from w w  w  .jav  a2 s . co m*/
@Test
public void testInQuery() {
    {
        final List<QueryElement> values = new ArrayList<QueryElement>();
        final PropertyQuery pq = new PropertyQuery();
        final List<Integer> ids = Arrays.asList(1, 2, 3, 4, 5);
        pq.addIn("id", ids);

        final String expectedQuery = BASIC_QUERY + "AND obj.id IN (?,?,?,?,?) ";
        assertEquals(expectedQuery, generate(pq, values));
        printQuery(expectedQuery);

        //         test arguments
        assertSame(1, values.size());
        final Set<Integer> ints = new HashSet<Integer>();
        for (final QueryElement integer : values) {
            ints.addAll((Collection<Integer>) integer.getValue());
        }
        assertEquals(cloneToSet(ids), ints);
    }

    {
        final List<QueryElement> values = new ArrayList<QueryElement>();
        final PropertyQuery pq = new PropertyQuery();
        final List<Integer> ids = countTo(1001);
        pq.addIn("id", ids);

        final String thousandQs = StringUtils.join(Collections.nCopies(1000, '?'), ',');
        final String expectedQuery = BASIC_QUERY + "AND (obj.id IN (" + thousandQs + ") OR obj.id IN (?)) ";
        assertEquals(expectedQuery, generate(pq, values));
        printQuery(expectedQuery);

        //         test arguments
        assertSame(2, values.size());

        //         test arguments
        final Set<Integer> ints = new HashSet<Integer>();
        for (final QueryElement integer : values) {
            ints.addAll((Collection<Integer>) integer.getValue());
        }
        assertEquals(cloneToSet(ids), ints);
    }

    {
        final List<QueryElement> values = new ArrayList<QueryElement>();
        final PropertyQuery pq = new PropertyQuery();
        pq.addIn("life", null);
        pq.addOrIn("gf", null);

        final String expectedQuery = BASIC_QUERY + "AND (obj.id IS NULL OR obj.id IS NULL) ";
        assertEquals(expectedQuery, generate(pq, values));
        printQuery(expectedQuery);
    }

    {
        final List<QueryElement> values = new ArrayList<QueryElement>();
        final PropertyQuery pq = new PropertyQuery();
        final List<Integer> ids = countTo(1001);
        pq.addNotIn("comfortLevel", ids);

        final String thousandQs = StringUtils.join(Collections.nCopies(1000, '?'), ',');
        final String expectedQuery = BASIC_QUERY + "AND (obj.comfortLevel NOT IN (" + thousandQs
                + ") AND obj.comfortLevel NOT IN (?)) ";
        assertEquals(expectedQuery, generate(pq, values));
        printQuery(expectedQuery);

        //         test arguments
        assertSame(2, values.size());

        //         test arguments
        final Set<Integer> ints = new HashSet<Integer>();
        for (final QueryElement integer : values) {
            ints.addAll((Collection<Integer>) integer.getValue());
        }
        assertEquals(cloneToSet(ids), ints);
    }
}

---

From source file:gobblin.service.SimpleKafkaSpecExecutorInstanceConsumer.java

public SimpleKafkaSpecExecutorInstanceConsumer(Config config, Optional<Logger> log) {
    super(config, log);

    // Consumer/* w  w w . jav a 2 s .  c  o m*/
    _kafka08Consumer = new Kafka08ConsumerClient.Factory().create(config);
    List<KafkaTopic> kafkaTopics = _kafka08Consumer.getFilteredTopics(Collections.EMPTY_LIST,
            Lists.newArrayList(Pattern.compile(config.getString(SPEC_KAFKA_TOPICS_KEY))));
    _partitions = kafkaTopics.get(0).getPartitions();
    _lowWatermark = Lists.newArrayList(Collections.nCopies(_partitions.size(), 0L));
    _nextWatermark = Lists.newArrayList(Collections.nCopies(_partitions.size(), 0L));
    _highWatermark = Lists.newArrayList(Collections.nCopies(_partitions.size(), 0L));

    InputStream dummyInputStream = new ByteArrayInputStream(new byte[0]);
    _decoder = DecoderFactory.get().binaryDecoder(dummyInputStream, null);
    _reader = new SpecificDatumReader<AvroJobSpec>(AvroJobSpec.SCHEMA$);
    _versionWriter = new FixedSchemaVersionWriter();
}

---

From source file:org.apache.mahout.knn.tools.TestNewsGroupsKMeanLogisticRegression.java

public void run(PrintWriter output) throws IOException {

    // Contains the best model.
    OnlineLogisticRegression classifier = ModelSerializer.readBinary(new FileInputStream(modelFile),
            OnlineLogisticRegression.class);

    // Get the cluster labels.
    List<String> lines = Files.readLines(new File(labelFile), Charset.defaultCharset());
    Map<String, Integer> labels = Maps.newHashMap();
    for (String line : lines.subList(1, lines.size())) {
        String[] chunks = line.split(", ");
        Preconditions.checkArgument(chunks.length == 2, "Invalid labels line " + chunks.toString());
        labels.put(chunks[0], Integer.parseInt(chunks[1]));
        System.out.printf("%s: %s\n", chunks[0], chunks[1]);
    }/* w ww .ja v  a 2s  .  c o m*/
    List<String> reverseLabels = new ArrayList(Collections.nCopies(labels.size(), ""));
    for (Map.Entry<String, Integer> pair : labels.entrySet()) {
        reverseLabels.set(pair.getValue(), pair.getKey());
    }

    Configuration conf = new Configuration();
    // Get the centroids used for computing the distances for this model.
    SequenceFileDirValueIterable<CentroidWritable> centroidIterable = new SequenceFileDirValueIterable<CentroidWritable>(
            new Path(centroidsFile), PathType.LIST, conf);
    List<Centroid> centroids = Lists
            .newArrayList(CreateCentroids.getCentroidsFromCentroidWritableIterable(centroidIterable));
    // Get the encoded documents (the vectors from tf-idf).
    SequenceFileDirIterable<Text, VectorWritable> inputIterable = new SequenceFileDirIterable<Text, VectorWritable>(
            new Path(inputFile), PathType.LIST, conf);

    ResultAnalyzer ra = new ResultAnalyzer(labels.keySet(), "DEFAULT");
    for (Pair<Text, VectorWritable> pair : inputIterable) {
        int actual = labels.get(pair.getFirst().toString());
        Vector encodedInput = distancesFromCentroidsVector(pair.getSecond().get(), centroids);
        Vector result = classifier.classifyFull(encodedInput);
        int cat = result.maxValueIndex();
        double score = result.maxValue();
        double ll = classifier.logLikelihood(actual, encodedInput);
        ClassifierResult cr = new ClassifierResult(reverseLabels.get(cat), score, ll);
        ra.addInstance(pair.getFirst().toString(), cr);
    }
    output.println(ra);
}

---

From source file:edu.washington.gs.skyline.model.quantification.GroupComparisonDataSet.java

public LinearFitResult calculateFoldChange(String label) {
    List<Replicate> replicates = removeIncompleteReplicates(label, this.replicates);
    if (replicates.size() == 0) {
        return null;
    }//w  w  w  .j a va  2  s  .  com
    List<Replicate> summarizedRows;
    if (replicates.stream().anyMatch(row -> null != row.getBioReplicate())) {
        Map<Pair<Boolean, Object>, List<Replicate>> groupedByBioReplicate = replicates.stream().collect(
                Collectors.groupingBy(replicate -> Pair.of(replicate.isControl(), replicate.bioReplicate)));
        summarizedRows = new ArrayList<>();
        for (Map.Entry<Pair<Boolean, Object>, List<Replicate>> entry : groupedByBioReplicate.entrySet()) {
            Double log2Abundance = calculateMean(entry.getValue().stream()
                    .map(replicateData -> replicateData.getLog2Abundance(label)).collect(Collectors.toList()));
            if (log2Abundance == null) {
                continue;
            }
            Replicate combinedReplicate = new Replicate(entry.getKey().getLeft(), entry.getKey().getValue());
            ResultFileData resultFileData = combinedReplicate.ensureResultFileData();
            resultFileData.setTransitionAreas(label,
                    TransitionAreas.fromMap(Collections.singletonMap("", Math.pow(2.0, log2Abundance))));
            if (getNormalizationMethod() instanceof NormalizationMethod.RatioToLabel) {
                TransitionAreas denominator = TransitionAreas.fromMap(Collections.singletonMap("", 1.0));
                resultFileData.setTransitionAreas(
                        ((NormalizationMethod.RatioToLabel) getNormalizationMethod()).getIsotopeLabelTypeName(),
                        denominator);
            }
            summarizedRows.add(combinedReplicate);
        }
    } else {
        summarizedRows = replicates;
    }

    List<Double> abundances = summarizedRows.stream()
            .map(replicateData -> replicateData.getLog2Abundance(label)).collect(Collectors.toList());
    List<Integer> features = Collections.nCopies(summarizedRows.size(), 0);
    List<Integer> runs = IntStream.range(0, summarizedRows.size()).boxed().collect(Collectors.toList());
    List<Integer> subjects = IntStream.range(0, summarizedRows.size()).boxed().collect(Collectors.toList());
    List<Boolean> subjectControls = summarizedRows.stream().map(Replicate::isControl)
            .collect(Collectors.toList());
    FoldChangeDataSet foldChangeDataSet = new FoldChangeDataSet(abundances, features, runs, subjects,
            subjectControls);
    DesignMatrix designMatrix = DesignMatrix.getDesignMatrix(foldChangeDataSet, false);
    LinearFitResult linearFitResult = designMatrix.performLinearFit().get(0);
    return linearFitResult;
}

---

From source file:org.openmrs.module.idcards.web.controller.TemplateFormController.java

/**
 * Handles the user's submission of the form.
 *///from w  ww. java2 s .c  o  m
@RequestMapping(method = RequestMethod.POST, params = "action=saveAndPrintEmpty")
public void onSaveAndPrintEmpty(@ModelAttribute("template") IdcardsTemplate template,
        HttpServletRequest request, HttpServletResponse response) throws IOException {

    if (Context.isAuthenticated()) {
        IdcardsService service = (IdcardsService) Context.getService(IdcardsService.class);
        service.saveIdcardsTemplate(template);

        try {
            StringBuffer requestURL = request.getRequestURL();
            String baseURL = requestURL.substring(0, requestURL.indexOf("/module"));

            PrintEmptyIdcardsServlet.generateOutput(template, baseURL, response, Collections.nCopies(10, 0),
                    null);
        } catch (Exception e) {
            log.error("Unable to print cards", e);
            e.printStackTrace(response.getWriter());
        }
    }

}

---

From source file:org.openmrs.module.idcards.web.servlet.PrintEmptyIdcardsServlet.java

/**
 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,
 *      javax.servlet.http.HttpServletResponse)
 *//*from w  w  w .ja va2s  . co m*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    Integer mrnCount = ServletRequestUtils.getRequiredIntParameter(request, "mrn_count");
    Integer templateId = ServletRequestUtils.getIntParameter(request, "templateId", 1);
    String generatedMRNs = ServletRequestUtils.getStringParameter(request, "generated_mrns", "none");
    String password = ServletRequestUtils.getStringParameter(request, "pdf_password");
    if (!StringUtils.hasLength(password))
        throw new ServletException("A non-empty password is required.");

    IdcardsTemplate card = getIdcardsService().getIdcardsTemplate(templateId);

    StringBuffer requestURL = request.getRequestURL();
    String baseURL = requestURL.substring(0, requestURL.indexOf("/moduleServlet"));

    List<Integer> identifiers = null;

    if ("none".equals(generatedMRNs)) {
        identifiers = Collections.nCopies(mrnCount, 0);
    } else if ("pregenerated".equals(generatedMRNs)) {
        identifiers = getIdcardsService().printGeneratedIdentifiers(mrnCount, card);
    } else if ("generateNew".equals(generatedMRNs)) {
        Integer min = Integer
                .valueOf(Context.getAdministrationService().getGlobalProperty("idcards.generateMin"));
        Integer max = Integer
                .valueOf(Context.getAdministrationService().getGlobalProperty("idcards.generateMax"));
        identifiers = getIdcardsService().generateAndPrintIdentifiers(mrnCount, min, max, card);
    } else
        throw new ServletException("Invalid choice for 'generatedMRNs' parameter");

    generateOutput(card, baseURL, response, identifiers, password);

}

---

From source file:com.thoughtworks.gauge.Table.java

private void addDashes(int maxStringLength, List<String> formattedHeaderAndRows) {

    String dashesString = Joiner.on(StringUtils.EMPTY).join(Collections.nCopies(maxStringLength, DASH));
    List<String> dashes = Collections.nCopies(headers.size(), dashesString);
    String formattedDashes = formattedRow(dashes, maxStringLength);
    formattedHeaderAndRows.add(formattedDashes);
}

---

From source file:org.netflux.core.Record.java

/**
 * Creates a record that can store the kind of data described by the supplied metadata, possibly setting all the fields to the
 * <code>null</code> value./*from  w  ww .ja v a2s  .co  m*/
 * 
 * @param metadata the metadata describing the data this record may hold
 * @param nullFields <code>true</code> to indicate that all fields should be set to <code>null</code>.
 * @throws NullPointerException if the supplied metadata is <code>null</code>.
 */
public Record(RecordMetadata metadata, boolean nullFields) {
    this.metadata = new RecordMetadata(metadata.getFieldMetadata());
    this.data = new ArrayList<Field<? extends Serializable>>(
            Collections.nCopies(this.metadata.getFieldCount(), (Field<Serializable>) null));
    if (nullFields) {
        this.nullFields(this.getMetadata().getFieldNames());
    }
}

---

From source file:org.jtalks.jcommune.service.transactional.TransactionalTopicFetchServiceTest.java

@Test
public void testGetUnansweredTopics() {
    String pageNumber = "1";
    int pageSize = 20;
    List<Topic> expectedList = Collections.nCopies(2, new Topic(user, "title"));
    Page<Topic> expectedPage = new PageImpl<>(expectedList);
    when(topicDao.getUnansweredTopics(Matchers.<PageRequest>any(), eq(user))).thenReturn(expectedPage);
    user.setPageSize(pageSize);// w ww.  j  a v a 2 s .c  o  m
    when(userService.getCurrentUser()).thenReturn(user);

    Page<Topic> actualPage = topicFetchService.getUnansweredTopics(pageNumber);
    assertNotNull(actualPage);
    assertEquals(actualPage, expectedPage);
}

---

From source file:com.networknt.limit.LimitHandlerTest.java

@Test
public void testMoreRequests() throws Exception {
    Callable<String> task = this::callApi;
    List<Callable<String>> tasks = Collections.nCopies(10, task);
    long start = System.currentTimeMillis();
    ExecutorService executorService = Executors.newFixedThreadPool(10);
    List<Future<String>> futures = executorService.invokeAll(tasks);
    List<String> resultList = new ArrayList<>(futures.size());
    // Check for exceptions
    for (Future<String> future : futures) {
        // Throws an exception if an exception was thrown by the task.
        resultList.add(future.get());//  w ww . j  a  v a  2  s.co m
    }
    long last = (System.currentTimeMillis() - start);
    // make sure that there are at least one element in resultList is :513
    Assert.assertTrue(resultList.contains(":513"));
    System.out.println("resultList = " + resultList + " response time = " + last);
}

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