Example usage for java.util Collection stream

Introduction

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

Prototype

default Stream<E> stream() 

Source Link

Document

Returns a sequential Stream with this collection as its source.

Usage

From source file:com.bekioui.jaxrs.server.core.NettyServer.java

private void resources(ResteasyDeployment deployment) {
    Collection<Object> resources = applicationContext.getBeansWithAnnotation(Path.class).values();

    if (swaggerEnabled) {
        List<? extends ResourceDescriptor> resourceDescriptors = swaggerResourceDescriptors != null
                ? swaggerResourceDescriptors
                : deploymentResourceDescriptors;
        Set<Class<?>> classes = resources.stream().filter(resourceFilter.apply(resourceDescriptors))
                .map(Object::getClass).collect(Collectors.toSet());
        SwaggerResource swaggerRessource = new SwaggerResource(swaggerSupplier.get(), classes);
        deployment.getResources().add(swaggerRessource);
        deployment.getProviders().add(new SwaggerSerializers());
    }/*from w  w  w. j  a v  a 2s . c  o m*/

    List<Object> deploymentResources = resources.stream()
            .filter(resourceFilter.apply(deploymentResourceDescriptors)).collect(Collectors.toList());
    deployment.getResources().addAll(deploymentResources);
}

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From source file:com.ikanow.aleph2.analytics.spark.utils.SparkTechnologyUtils.java

/** Creates a command line call to launch spark
 * @param spark_home//from w w  w .j a v  a 2s  . c om
 * @param yarn_home
 * @param spark_master
 * @param main_clazz
 * @param context_signature
 * @param main_jar
 * @param other_jars
 * @param spark_job_options
 * @param spark_system_options
 */
public static ProcessBuilder createSparkJob(final String job_name, final String spark_home,
        final String yarn_home, final String spark_master, final Optional<String> maybe_main_clazz,
        final String context_signature, final Optional<String> test_signature, final String main_jar_or_py,
        final Collection<String> other_jars, final Collection<String> other_files,
        final Collection<String> other_lang_files, final List<String> external_jars,
        final List<String> external_files, final List<String> external_lang_files,
        final Optional<Map<String, Object>> spark_generic_options, final Map<String, String> spark_job_options,
        final Map<String, String> spark_system_options

) {
    //https://spark.apache.org/docs/1.2.0/submitting-applications.html

    final List<String> command_line = ImmutableList.<String>builder().add(SBT_SUBMIT_BINARY).add("--name")
            .add(job_name)
            .addAll(maybe_main_clazz.map(main_clazz -> Arrays.asList("--class", main_clazz))
                    .orElse(Collections.emptyList()))
            .add("--master").add(spark_master).add("--jars")
            .add(Stream.concat(other_jars.stream(), external_jars.stream()).collect(Collectors.joining(",")))
            .addAll(Optional
                    .of(Stream.concat(other_files.stream(), external_files.stream())
                            .collect(Collectors.joining(",")))
                    .filter(s -> !s.isEmpty()).map(s -> Arrays.asList("--files", s))
                    .orElse(Collections.emptyList()))
            //TODO (ALEPH-63): handle R in the example below
            .addAll(Optional
                    .of(Stream.concat(other_lang_files.stream(), external_lang_files.stream())
                            .collect(Collectors.joining(",")))
                    .filter(s -> !s.isEmpty()).map(s -> Arrays.asList("--py-files", s))
                    .orElse(Collections.emptyList()))
            .addAll(Optional.ofNullable(System.getProperty("hdp.version")).map(hdp_version -> { // Set HDP version from whatever I'm set to
                return (List<String>) ImmutableList.<String>of("--conf",
                        "spark.executor.extraJavaOptions=-Dhdp.version=" + hdp_version, "--conf",
                        "spark.driver.extraJavaOptions=-Dhdp.version=" + hdp_version, "--conf",
                        "spark.yarn.am.extraJavaOption=-Dhdp.version=" + hdp_version);
            }).orElse(Collections.emptyList()))
            .addAll(spark_job_options.isEmpty() ? Collections.emptyList()
                    : spark_job_options.entrySet().stream()
                            .flatMap(kv -> Stream.of("--conf", kv.getKey() + "=" + kv.getValue()))
                            .collect(Collectors.toList()))
            .addAll(spark_system_options.entrySet().stream()
                    .flatMap(kv -> Stream.of(kv.getKey(), kv.getValue())).collect(Collectors.toList()))
            .addAll(spark_generic_options.map(opts -> Arrays.asList("--conf",
                    SparkTopologyConfigBean.JOB_CONFIG_KEY + "="
                            + BeanTemplateUtils.configureMapper(Optional.empty()).convertValue(opts,
                                    JsonNode.class)))
                    .orElse(Collections.emptyList()))
            .add(main_jar_or_py).add(context_signature)
            .addAll(test_signature.map(ts -> Arrays.asList(ts)).orElse(Collections.emptyList())).build();

    final ProcessBuilder pb = new ProcessBuilder();

    final Map<String, String> mutable_env = pb.environment();
    mutable_env.put("HADOOP_CONF_DIR", yarn_home);

    return pb.directory(new File(spark_home)).command(command_line);
}

---

From source file:delfos.dataset.generated.modifieddatasets.pseudouser.PseudoUserRatingsDataset.java

@Override
public Map<Integer, RatingType> getItemRatingsRated(Integer idItem) throws ItemNotFound {

    Map<Integer, RatingType> itemRatingsRated = originalDatasetLoader.getRatingsDataset()
            .getItemRatingsRated(idItem);

    Collection<RatingType> ratedByPseudoUsers = pseudoUsersRatings.values().parallelStream()
            .flatMap(pseudoUserRatings -> pseudoUserRatings.values().stream())
            .filter(rating -> rating.getIdItem() == idItem).collect(Collectors.toList());

    Map<Integer, RatingType> itemsRatingsRated_byPseudoUsers = ratedByPseudoUsers.stream()
            .collect(Collectors.toMap(rating -> rating.getIdItem(), rating -> rating));

    Map<Integer, RatingType> ret = new TreeMap<>();

    ret.putAll(itemRatingsRated);/*w  w  w . j  a v a2 s.c  o  m*/
    ret.putAll(itemsRatingsRated_byPseudoUsers);

    return ret;
}

---

From source file:com.offbynull.voip.kademlia.model.NodeChangeSet.java

NodeChangeSet(Collection<Node> added, Collection<Node> removed, Collection<Node> updated) {
    Validate.notNull(removed);// w w w .  j a  va2 s  . co m
    Validate.notNull(added);
    Validate.notNull(updated);
    Validate.noNullElements(removed);
    Validate.noNullElements(added);
    Validate.noNullElements(updated);

    // ensure that there aren't any duplicate ids
    Set<Id> tempSet = new HashSet<>();
    removed.stream().map(x -> x.getId()).forEach(x -> tempSet.add(x));
    added.stream().map(x -> x.getId()).forEach(x -> tempSet.add(x));
    updated.stream().map(x -> x.getId()).forEach(x -> tempSet.add(x));
    Validate.isTrue(tempSet.size() == added.size() + removed.size() + updated.size());

    this.removed = (UnmodifiableList<Node>) UnmodifiableList.unmodifiableList(new ArrayList<>(removed));
    this.added = (UnmodifiableList<Node>) UnmodifiableList.unmodifiableList(new ArrayList<>(added));
    this.updated = (UnmodifiableList<Node>) UnmodifiableList.unmodifiableList(new ArrayList<>(updated));
}

---

From source file:ai.grakn.client.LoaderClient.java

/**
 * Transform queries into Json configuration needed by the Loader task
 * @param queries queries to include in configuration
 * @param batchNumber number of the current batch being sent
 * @return configuration for the loader task
 *///from  w ww. j  av a  2s  . c o  m
private String getConfiguration(Collection<InsertQuery> queries, int batchNumber) {
    return Json.object().set(KEYSPACE_PARAM, keyspace).set("batchNumber", batchNumber)
            .set(TASK_LOADER_INSERTS, queries.stream().map(InsertQuery::toString).collect(toList())).toString();
}

---

From source file:com.spankingrpgs.scarletmoon.loader.CharacterLoader.java

@Override
public void load(Collection<String> data, GameState state) {
    data.stream().forEach(datum -> loadCharacter(datum, state));
}

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From source file:com.hortonworks.streamline.streams.service.NamespaceCatalogResource.java

private void assertNoTopologyRefersNamespace(Long namespaceId) {
    Collection<Topology> topologies = catalogService.listTopologies();
    boolean anyTopologyUseNamespace = topologies.stream()
            .anyMatch(t -> Objects.equals(t.getNamespaceId(), namespaceId));

    if (anyTopologyUseNamespace) {
        throw BadRequestException
                .message("Topology refers the namespace trying to remove - namespace id: " + namespaceId);
    }/* w w  w  . j  av a2  s.  com*/
}

---

From source file:com.offbynull.voip.kademlia.model.ActivityChangeSet.java

ActivityChangeSet(Collection<Activity> added, Collection<Activity> removed, Collection<Activity> updated) {
    Validate.notNull(removed);/* ww w.jav a 2 s . co  m*/
    Validate.notNull(added);
    Validate.notNull(updated);
    Validate.noNullElements(removed);
    Validate.noNullElements(added);
    Validate.noNullElements(updated);

    // ensure that there aren't any duplicate ids
    Set<Id> tempSet = new HashSet<>();
    removed.stream().map(x -> x.getNode().getId()).forEach(x -> tempSet.add(x));
    added.stream().map(x -> x.getNode().getId()).forEach(x -> tempSet.add(x));
    updated.stream().map(x -> x.getNode().getId()).forEach(x -> tempSet.add(x));
    Validate.isTrue(tempSet.size() == added.size() + removed.size() + updated.size());

    this.removed = (UnmodifiableList<Activity>) UnmodifiableList.unmodifiableList(new ArrayList<>(removed));
    this.added = (UnmodifiableList<Activity>) UnmodifiableList.unmodifiableList(new ArrayList<>(added));
    this.updated = (UnmodifiableList<Activity>) UnmodifiableList.unmodifiableList(new ArrayList<>(updated));
}

---

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