Example usage for java.util List stream

Introduction

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

Prototype

default Stream<E> stream()

Source Link

Document

Returns a sequential Stream with this collection as its source.

Usage

From source file:de.metas.ui.web.view.json.JSONDocumentViewOrderBy.java

public static final List<DocumentQueryOrderBy> unwrapList(final List<JSONDocumentViewOrderBy> jsonOrderBys) {
    if (jsonOrderBys == null || jsonOrderBys.isEmpty()) {
        return ImmutableList.of();
    }//from  www.ja  v a  2 s.c o m

    return jsonOrderBys.stream().map(jsonOrderBy -> unwrap(jsonOrderBy)).filter(orderBy -> orderBy != null)
            .collect(GuavaCollectors.toImmutableList());
}

From source file:uk.ac.cam.cl.dtg.picky.client.analytics.Analytics.java

private static void fillProperties(Properties properties, Dataset dataset) {
    if (dataset == null)
        return;/* ww  w . ja v a 2s  .co m*/

    List<FileEntry> files = dataset.getFiles();

    long numberOfChunks = files.stream().flatMap(f -> f.getBlocks().stream())
            .flatMap(b -> b.getChunks().stream()).count();

    double avgNumberofBlocks = files.stream().mapToLong(f -> f.getBlocks().size()).average().getAsDouble();

    properties.put(KEY_DATASET_DESCRIPTION, Strings.nullToEmpty(dataset.getDescription()));
    properties.put(KEY_DATASET_ID, dataset.getId());
    properties.put(KEY_DATASET_NUMBER_OF_FILES, "" + files.size());
    properties.put(KEY_DATASET_NUMBER_OF_CHUNKS, "" + numberOfChunks);
    properties.put(KEY_DATASET_AVG_NUMBER_OF_BLOCKS, "" + avgNumberofBlocks);
}

From source file:com.devicehive.dao.riak.model.RiakDeviceEquipment.java

public static List<RiakDeviceEquipment> convertToEntity(List<DeviceEquipmentVO> equipment) {
    if (equipment == null) {
        return Collections.emptyList();
    }/*  w ww.j  a  v a2s  . c  o m*/
    return equipment.stream().map(RiakDeviceEquipment::convertToEntity).collect(Collectors.toList());
}

From source file:com.netflix.spinnaker.clouddriver.google.controllers.GoogleNamedImageLookupController.java

/**
 * Apply tag-based filtering to the list of named images.
 *
 * For example: /gce/images/find?q=PackageName&tag:stage=released&tag:somekey=someval
 *///from  ww  w .ja  v  a 2 s.c o m
private static List<NamedImage> filter(List<NamedImage> namedImages, Map<String, String> tagFilters) {
    return namedImages.stream().filter(namedImage -> matchesTagFilters(namedImage, tagFilters))
            .collect(Collectors.toList());
}

From source file:com.pinterest.rocksplicator.controller.config.ConfigParser.java

/**
 * Convert cluster config data into a {@link ClusterBean}.
 *
 * @param clusterName name of the cluster
 * @param content binary config data//from   w ww .ja  va 2  s.  c o m
 * @return ClusterBean or null if parsing failed
 */
@SuppressWarnings("unchecked")
public static ClusterBean parseClusterConfig(String clusterName, byte[] content) {
    try {
        Map<String, Object> segmentMap = OBJECT_MAPPER.readValue(new String(content, UTF_8), HashMap.class);

        final List<SegmentBean> segments = new ArrayList<>();
        for (Map.Entry<String, Object> entry : segmentMap.entrySet()) {
            Map<String, Object> segmentInfo = (Map<String, Object>) entry.getValue();
            // num_leaf_segments must exist so that we can proceed
            if (!segmentInfo.containsKey(NUM_SHARDS)) {
                return null;
            }

            final SegmentBean segment = new SegmentBean().setName(entry.getKey())
                    .setNumShards((Integer) segmentInfo.get(NUM_SHARDS));

            final List<HostBean> hosts = new ArrayList<>();
            for (Map.Entry<String, Object> entry2 : segmentInfo.entrySet()) {
                // skip num_leaf_segments in shard map
                if (entry2.getKey().equals(NUM_SHARDS)) {
                    continue;
                }

                HostBean host = parseHost(entry2.getKey());
                List<String> shardList = (List<String>) entry2.getValue();
                List<ShardBean> shards = shardList.stream().map(ConfigParser::parseShard)
                        .collect(Collectors.toList());
                host.setShards(shards);
                hosts.add(host);
            }
            segment.setHosts(hosts);
            segments.add(segment);
        }
        return new ClusterBean().setName(clusterName).setSegments(segments);
    } catch (IOException | IllegalArgumentException e) {
        LOG.error("Failed to parse cluster config.", e);
        return null;
    }
}

From source file:com.devicehive.dao.riak.model.RiakDeviceEquipment.java

public static List<DeviceEquipmentVO> convertToVo(List<RiakDeviceEquipment> equipment) {
    if (equipment == null) {
        return Collections.emptyList();
    }/*w ww.jav  a  2 s .co m*/
    return equipment.stream().map(RiakDeviceEquipment::convertToVo).collect(Collectors.toList());
}

From source file:kafka.benchmark.AdvertisingTopology.java

public static String listOfStringToString(List<String> list, String port) {
    return list.stream().map(item -> item + ":" + port).collect(Collectors.joining(","));
}

From source file:de.tynne.benchmarksuite.Main.java

private static void runBenchmarks(Args args, BenchmarkProducer benchmarkProducer) throws IOException {
    BackupHelper.backupIfNeeded(args.getOutput());

    // this looks like NOT comma seperated values, but excel and libreoffice load this automatically
    final CSVFormat format = CSVFormat.EXCEL.withDelimiter(';').withHeader("#", "ID", "Name", "Min [ns]",
            "Avg [ns]", "Max [ns]", "Chart Pos", "Best Increase [%]", "Iterations");
    try (CSVPrinter printer = new CSVPrinter(
            new OutputStreamWriter(new FileOutputStream(args.getOutput()), Charset.forName(args.getCharset())),
            format)) {/*  www .  j av a 2  s.co m*/
        List<Benchmark> benchmarks = benchmarkProducer.get();
        List<Benchmark> matching = benchmarks.stream()
                .filter(b -> args.getExecute().matcher(b.getId()).matches()).collect(Collectors.toList());
        BenchmarkRunner benchmarkRunner = new BenchmarkRunner(matching,
                BenchmarkRunner.SEC_IN_NANOS * args.getWarumUpTime(),
                BenchmarkRunner.SEC_IN_NANOS * args.getRunTime());
        benchmarkRunner.run();
        Chart chart = Chart.of(matching);

        for (Benchmark b : matching) {
            try {
                StatRecord statRecord = chart.getStats().get(b);
                printer.print(matching.indexOf(b));
                printer.print(b.getId());
                printer.print(b.getName());
                printer.print(format(args, statRecord.getMin()));
                printer.print(format(args, statRecord.getAverage()));
                printer.print(format(args, statRecord.getMax()));
                printer.print(chart.getChart().get(b).chartPosition);
                double bestAvg = chart.getStats().get(chart.getPerformanceChart().get(0)).getAverage();
                double thisAvg = statRecord.getAverage();

                printer.print(format(args, 100. * (thisAvg - bestAvg) / bestAvg));
                printer.print(statRecord.getCount());
                printer.println();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}

From source file:edu.umd.umiacs.clip.tools.classifier.LibSVMUtils.java

public static List<Map<Integer, Double>> asMap(List<String> features) {
    return features.stream().map(LibSVMUtils::asMap).collect(toList());
}

From source file:info.archinnov.achilles.internals.parser.FunctionParser.java

public static void validateNoDuplicateDeclaration(AptUtils aptUtils, List<FunctionSignature> signatures) {
    // Validate not declared many time using full equality
    for (FunctionSignature signature : signatures) {
        signatures.stream().filter(signature::equals) //Equality by comparing name, keyspace, return types and param types
                .filter(x -> x != signature) //Identity comparison, exclude self
                .forEach(x -> aptUtils.printError(
                        "Functions '%s' and '%s' have same signature. Duplicate function declaration is not allowed",
                        signature, x));//from w w w.  j  av a 2s .  c  o  m
    }
}