Example usage for java.util.stream StreamSupport stream

Introduction

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

Prototype

public static <T> Stream<T> stream(Spliterator<T> spliterator, boolean parallel)

Source Link

Document

Creates a new sequential or parallel Stream from a Spliterator .

Usage

From source file:net.dv8tion.jda.core.utils.cache.impl.AbstractCacheView.java

@Override
public Stream<T> parallelStream() {
    return StreamSupport.stream(spliterator(), true);
}

From source file:org.hawkular.rest.json.RelationshipJacksonDeserializer.java

@Override
public Relationship deserialize(JsonParser jp, DeserializationContext deserializationContext)
        throws IOException {
    JsonNode node = jp.getCodec().readTree(jp);
    String id = node.get(FIELD_ID) != null ? node.get(FIELD_ID).asText() : null;

    // other fields are not compulsory, e.g. when deleting the relationship {id: foo} is just fine
    String name = "";
    if (node.get(FIELD_NAME) != null) {
        name = node.get(FIELD_NAME).asText();
    }/*from   w ww . j  a  v  a2 s.c o  m*/
    CanonicalPath source = null, target = null;
    if (node.get(FIELD_SOURCE) != null && !node.get(FIELD_SOURCE).asText().isEmpty()) {
        String sourcePath = node.get(FIELD_SOURCE).asText();
        source = CanonicalPath.fromString(sourcePath);
    }
    if (node.get(FIELD_TARGET) != null && !node.get(FIELD_TARGET).asText().isEmpty()) {
        String targetPath = node.get(FIELD_TARGET).asText();
        target = CanonicalPath.fromString(targetPath);
    }

    JsonNode properties = node.get(FIELD_PROPERTIES);
    Map<String, Object> relProperties = null;
    if (properties != null) {
        try {
            Stream<Map.Entry<String, JsonNode>> stream = StreamSupport.stream(
                    Spliterators.spliteratorUnknownSize(properties.fields(), Spliterator.ORDERED), false);

            relProperties = stream.collect(Collectors.toMap(Map.Entry::getKey,
                    ((Function<Map.Entry<String, JsonNode>, JsonNode>) Map.Entry::getValue)
                            .andThen(x -> (Object) x.asText())));
        } catch (Exception e) {
            throw new IllegalArgumentException("Error during relationship deserialization,"
                    + " unable to recognize properties: " + properties);
        }
    }

    return new Relationship(id, name, source, target, relProperties);
}

From source file:org.mskcc.shenkers.data.interval.GIntervalTreeMap.java

public Stream<IntervalFeature<T>> streamOverlaps(String chr, int start, int end) {
    boolean parallel = false;
    int characteristics = 0;
    return StreamSupport.stream(Spliterators.spliteratorUnknownSize(query(chr, start, end), characteristics),
            parallel);//from  w ww.j a  va2s.c  om
}

From source file:org.jboss.forge.addon.springboot.commands.jpa.SpringBootJPASetupWizard.java

private void initProviders() {
    jpaProvider.setItemLabelConverter(PersistenceProvider::getName);

    // select Hibernate provider as the default one
    final PersistenceProvider hibernate = StreamSupport
            .stream(jpaProvider.getValueChoices().spliterator(), false)
            .filter(provider -> provider.getName().toLowerCase().contains("hibernate")).findFirst()
            .orElseThrow(() -> new IllegalStateException("Hibernate Persistence Provider is not available"));

    jpaProvider.setDefaultValue(hibernate);
}

From source file:com.github.rutledgepaulv.qbuilders.structures.FieldPath.java

private static <T> Stream<T> streamIter(Iterable<T> iterable) {
    return StreamSupport.stream(iterable.spliterator(), false);
}

From source file:fi.vrk.xroad.catalog.persistence.CatalogServiceImpl.java

@Override
public void saveAllMembersAndSubsystems(Collection<Member> members) {
    LocalDateTime now = LocalDateTime.now();
    // process members
    Map<MemberId, Member> unprocessedOldMembers = new HashMap<>();
    StreamSupport.stream(memberRepository.findAll().spliterator(), false)
            .forEach(member -> unprocessedOldMembers.put(member.createKey(), member));

    for (Member member : members) {
        Member oldMember = unprocessedOldMembers.get(member.createKey());
        if (oldMember == null) {
            // brand new item
            member.getStatusInfo().setTimestampsForNew(now);
            for (Subsystem subsystem : member.getAllSubsystems()) {
                subsystem.getStatusInfo().setTimestampsForNew(now);
                subsystem.setMember(member);
            }/*w ww .ja va 2  s  .  c o m*/
            member = memberRepository.save(member);
        } else {
            handleOldMember(now, member, oldMember);

            member = memberRepository.save(oldMember);
        }
        unprocessedOldMembers.remove(member.createKey());
    }
    // now unprocessedOldMembers should all be removed (either already removed, or will be now)
    removeUnprocessedOldMembers(now, unprocessedOldMembers);
}

From source file:org.mskcc.shenkers.data.interval.GIntervalTree.java

public Stream<Node> streamOverlapNodes(String chr, int start, int end, Strand strand) {
    boolean parallel = false;
    int characteristics = 0;
    return StreamSupport.stream(
            Spliterators.spliteratorUnknownSize(queryNodes(chr, start, end, strand), characteristics),
            parallel);//w  w w . j  a va2 s  .  com
}

From source file:com.linecorp.armeria.server.docs.DocService.java

/**
 * Creates a new instance, prepopulating debug forms with the provided {@code sampleRequests}.
 * {@code sampleRequests} should be a list of Thrift argument objects for methods that should be
 * prepopulated (e.g., a populated hello_args object for the hello method on HelloService).
 *///w  w  w . j  av  a  2 s. co  m
public DocService(Iterable<? extends TBase<?, ?>> sampleRequests) {
    super(ofExact("/specification.json", HttpFileService.forVfs(new DocServiceVfs())),
            ofCatchAll(HttpFileService.forClassPath(DocService.class.getClassLoader(),
                    "com/linecorp/armeria/server/docs")));
    requireNonNull(sampleRequests, "sampleRequests");
    this.sampleRequests = StreamSupport.stream(sampleRequests.spliterator(), false)
            .collect(Collectors.toMap(Object::getClass, Function.identity()));
}

From source file:org.eclipse.sw360.licenseinfo.parsers.AbstractCLIParser.java

private Stream<Node> streamFromNodeList(NodeList nodes) {
    Iterator<Node> iter = new NodeListIterator(nodes);
    Iterable<Node> iterable = () -> iter;
    return StreamSupport.stream(iterable.spliterator(), false);
}

From source file:com.github.steveash.guavate.Guavate.java

/**
 * Creates a stream that wraps a stream with the index.
 * <p>/*from w  w  w.  ja  v  a 2 s .  com*/
 * Each input object is decorated with an {@link ObjIntPair}.
 * The {@code int} is the index of the element in the stream.
 * @param <T> the type of the stream
 * @param stream the stream to index
 * @return a stream of pairs, containing the element and index
 */
public static <T> Stream<ObjIntPair<T>> zipWithIndex(Stream<T> stream) {
    Spliterator<T> split1 = stream.spliterator();
    Iterator<T> it1 = Spliterators.iterator(split1);
    Iterator<ObjIntPair<T>> it = new Iterator<ObjIntPair<T>>() {
        int index = 0;

        @Override
        public boolean hasNext() {
            return it1.hasNext();
        }

        @Override
        public ObjIntPair<T> next() {
            return ObjIntPair.of(it1.next(), index++);
        }
    };
    Spliterator<ObjIntPair<T>> split = Spliterators.spliterator(it, split1.getExactSizeIfKnown(),
            split1.characteristics());
    return StreamSupport.stream(split, false);
}