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.peran.DependencyReadingStarter.java

public static void main(final String[] args) throws ParseException, FileNotFoundException {
    final Options options = OptionConstants.createOptions(OptionConstants.FOLDER, OptionConstants.STARTVERSION,
            OptionConstants.ENDVERSION, OptionConstants.OUT);

    final CommandLineParser parser = new DefaultParser();
    final CommandLine line = parser.parse(options, args);

    final File projectFolder = new File(line.getOptionValue(OptionConstants.FOLDER.getName()));

    final File dependencyFile;
    if (line.hasOption(OptionConstants.OUT.getName())) {
        dependencyFile = new File(line.getOptionValue(OptionConstants.OUT.getName()));
    } else {/*from w  ww .  j av  a 2s  .c o  m*/
        dependencyFile = new File("dependencies.xml");
    }

    File outputFile = projectFolder.getParentFile();
    if (outputFile.isDirectory()) {
        outputFile = new File(projectFolder.getParentFile(), "ausgabe.txt");
    }

    LOG.debug("Lese {}", projectFolder.getAbsolutePath());
    final VersionControlSystem vcs = VersionControlSystem.getVersionControlSystem(projectFolder);

    System.setOut(new PrintStream(outputFile));
    // System.setErr(new PrintStream(outputFile));

    final DependencyReader reader;
    if (vcs.equals(VersionControlSystem.SVN)) {
        final String url = SVNUtils.getInstance().getWCURL(projectFolder);
        final List<SVNLogEntry> entries = getSVNCommits(line, url);
        LOG.debug("SVN commits: "
                + entries.stream().map(entry -> entry.getRevision()).collect(Collectors.toList()));
        reader = new DependencyReader(projectFolder, url, dependencyFile, entries);
    } else if (vcs.equals(VersionControlSystem.GIT)) {
        final List<GitCommit> commits = getGitCommits(line, projectFolder);
        reader = new DependencyReader(projectFolder, dependencyFile, commits);
        LOG.debug("Reader initalized");
    } else {
        throw new RuntimeException("Unknown version control system");
    }
    reader.readDependencies();
}

From source file:Main.java

public static void main(String[] args) {
    List<Person> roster = createRoster();

    System.out.println("Names of male members with collect operation: ");
    List<String> namesOfMaleMembersCollect = roster.stream().filter(p -> p.getGender() == Person.Sex.MALE)
            .map(p -> p.getName()).collect(Collectors.toList());

    namesOfMaleMembersCollect.stream().forEach(p -> System.out.println(p));

}

From source file:pt.souplesse.spark.Server.java

public static void main(String[] args) {
    EntityManagerFactory factory = Persistence.createEntityManagerFactory("guestbook");
    EntityManager manager = factory.createEntityManager();
    JinqJPAStreamProvider streams = new JinqJPAStreamProvider(factory);
    get("/messages", (req, rsp) -> {
        rsp.type("application/json");
        return gson.toJson(streams.streamAll(manager, Message.class).collect(Collectors.toList()));
    });/*from  w  w w.  jav  a 2 s  . co  m*/
    post("/messages", (req, rsp) -> {
        try {
            Message msg = gson.fromJson(req.body(), Message.class);
            if (StringUtils.isBlank(msg.getMessage()) || StringUtils.isBlank(msg.getName())) {
                halt(400);
            }
            manager.getTransaction().begin();
            manager.persist(msg);
            manager.getTransaction().commit();
        } catch (JsonSyntaxException e) {
            halt(400);
        }
        rsp.type("application/json");
        return gson.toJson(streams.streamAll(manager, Message.class).collect(Collectors.toList()));
    });
    get("/comments", (req, rsp) -> {
        rsp.type("application/json");
        Map<String, List<Body>> body = new HashMap<>();
        try (CloseableHttpClient client = create().build()) {
            String url = String.format("https://api.github.com/repos/%s/events", req.queryMap("repo").value());
            log.info(url);
            body = client.execute(new HttpGet(url), r -> {
                List<Map<String, Object>> list = gson.fromJson(EntityUtils.toString(r.getEntity()), List.class);
                Map<String, List<Body>> result = new HashMap<>();
                list.stream().filter(m -> m.getOrDefault("type", "").equals("IssueCommentEvent"))
                        .map(m -> new Body(((Map<String, String>) m.get("actor")).get("login"),
                                ((Map<String, Map<String, String>>) m.get("payload")).get("comment")
                                        .get("body")))
                        .forEach(b -> result.compute(b.getLogin(), (k, v) -> v == null ? new ArrayList<>()
                                : Lists.asList(b, v.toArray(new Body[v.size()]))));
                return result;
            });
        } catch (IOException e) {
            log.error(null, e);
            halt(400, e.getMessage());
        }
        return gson.toJson(body);
    });
}

From source file:Main.java

public static void main(String[] args) {
    List<Person> roster = createRoster();
    ConcurrentMap<Person.Sex, List<Person>> byGenderParallel = roster.parallelStream()
            .collect(Collectors.groupingByConcurrent(Person::getGender));

    List<Map.Entry<Person.Sex, List<Person>>> byGenderList = new ArrayList<>(byGenderParallel.entrySet());

    System.out.println("Group members by gender:");
    byGenderList.stream().forEach(e -> {
        System.out.println("Gender: " + e.getKey());
        e.getValue().stream().map(Person::getName).forEach(f -> System.out.println(f));
    });//  w ww  .  jav  a 2s  .c  o  m

}

From source file:Main.java

public static void main(String[] args) {
    List<Trade> trades = TradeUtil.createTrades();

    Function<Trade, Integer> doubledQty = t -> {
        t.setQuantity(t.getQuantity() * 2);
        return t.getQuantity();
    };//from w  ww  . ja va2  s.c  o m

    long x = trades.stream().map(doubledQty).filter(qty -> qty > 15).count();

    System.out.println(x);

}

From source file:cc.kave.commons.pointsto.evaluation.runners.ProjectStoreRunner.java

public static void main(String[] args) throws IOException {
    Path storeDir = Paths.get(args[0]);
    try (ProjectUsageStore store = new ProjectUsageStore(storeDir)) {
        List<ICoReTypeName> types = new ArrayList<>(store.getAllTypes());
        types.sort(new TypeNameComparator());

        System.out.println(//  ww w.  j  ava  2s  .  com
                types.stream().filter(t -> t.getIdentifier().contains("KaVE.")).collect(Collectors.toList()));
        //         if (args.length == 1 || args[1].equals("countFilteredUsages")) {
        //            countFilteredUsages(types, store);
        //         } else if (args[1].equals("countRecvCallSites")) {
        //            countRecvCallSites(types, store);
        //         }
        // methodPropabilities(types, store);
    }

}

From source file:com.khartec.waltz.jobs.sample.CapabilityGenerator.java

public static void main(String[] args) throws IOException {

    AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(DIConfiguration.class);
    DSLContext dsl = ctx.getBean(DSLContext.class);

    List<String> lines = readLines(CapabilityGenerator.class.getResourceAsStream("/capabilities.csv"));

    System.out.println("Deleting existing Caps's");
    dsl.deleteFrom(CAPABILITY).execute();

    List<CapabilityRecord> records = lines.stream().skip(1).map(line -> line.split("\t"))
            .filter(cells -> cells.length == 4).map(cells -> {
                CapabilityRecord record = new CapabilityRecord();
                record.setId(longVal(cells[0]));
                record.setParentId(longVal(cells[1]));
                record.setName(cells[2]);
                record.setDescription(cells[3]);

                System.out.println(record);
                return record;
            }).collect(Collectors.toList());

    System.out.println("Inserting new Caps's");
    dsl.batchInsert(records).execute();//from   w  w  w . j  a v  a  2  s  . co  m

    System.out.println("Done");

}

From source file:com.doctor.java8.GroupingTheData.java

public static void main(String[] args) {
    List<Person> persons = Arrays.asList(new Person("doctor", "man", "address-1"),
            new Person("doctor who ", "man", "address-1"), new Person("doctor me", "woman", "address-2"));
    Map<String, List<Person>> map = persons.stream().collect(Collectors.groupingBy(Person::getSex));
    System.out.println(map);/*from  ww  w  . ja va2 s . c  om*/

    Map<String, Map<String, List<Person>>> map2 = persons.stream()
            .collect(Collectors.groupingBy(Person::getSex, Collectors.groupingBy(Person::getAddress)));
    System.out.println(map2);
}

From source file:com.khartec.waltz.jobs.sample.OrgUnitGenerator.java

public static void main(String[] args) throws IOException {

    AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(DIConfiguration.class);
    DSLContext dsl = ctx.getBean(DSLContext.class);

    List<String> lines = readLines(OrgUnitGenerator.class.getResourceAsStream("/org-units.csv"));

    System.out.println("Deleting existing OU's");
    dsl.deleteFrom(ORGANISATIONAL_UNIT).execute();

    List<OrganisationalUnitRecord> records = lines.stream().skip(1)
            .map(line -> StringUtils.splitPreserveAllTokens(line, ",")).filter(cells -> cells.length == 4)
            .map(cells -> {/*  w  ww  .  j  a  va  2 s. c om*/
                OrganisationalUnitRecord record = new OrganisationalUnitRecord();
                record.setId(longVal(cells[0]));
                record.setParentId(longVal(cells[1]));
                record.setName(cells[2]);
                record.setDescription(cells[3]);
                record.setUpdatedAt(new Timestamp(System.currentTimeMillis()));

                System.out.println(record);
                return record;
            }).collect(Collectors.toList());

    System.out.println("Inserting new OU's");
    dsl.batchInsert(records).execute();

    System.out.println("Done");

}

From source file:com.rdsic.pileconstructionmanagement.test.Test.java

public static void main(String[] args) {
    String sql = "select * from user";

    List<Map<String, Object>> list = (ArrayList) GenericHql.INSTANCE.querySQL(sql, 20);

    if (!list.isEmpty()) {
        System.out.println("cnt:" + list.size());

        JSONObject r = new JSONObject();
        r.put("items", list);

        System.out.println(r.toString());

        list.stream().map((item) -> {
            System.out.println("RECORD");
            return item;
        }).forEach((item) -> {/*from   w w w. j ava 2s .com*/

            for (String k : item.keySet()) {
                JSONObject j = new JSONObject(item);
                System.out.println(j.toString());

                System.out.println(StringUtils.rightPad(k, 20, " ") + item.get(k).toString());
            }
        });
    }
    System.exit(0);
}