Example usage for java.util Collection parallelStream

Introduction

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

Prototype

default Stream<E> parallelStream() 

Source Link

Document

Returns a possibly parallel Stream with this collection as its source.

Usage

From source file:Main.java

public static <T> Stream<T> parallelStream(Collection<T> collection) {
    return collection.parallelStream();
}

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From source file:Main.java

/**
 * Returns the given collection as stream.
 *
 * @param <T>//from   www  . ja v  a 2  s .  com
 *            the generic type
 * @param source
 *            the source
 * @param parallel
 *            <code>true</code> if the stream should be a parallel stream
 * @return the stream
 */
public static <T> Stream<T> asStream(Collection<T> source, boolean parallel) {
    return parallel ? source.parallelStream() : source.stream();
}

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

public static List<Map<Integer, Double>> appendFeatures(Collection<List<Map<Integer, Double>>> list) {
    return list.parallelStream().reduce(new ArrayList<>(), (list1, list2) -> appendFeatures(list1, list2));
}

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

public static List<String> addValues(Collection<Pair<Double, List<String>>> input) {
    return range(0, input.stream().findAny().get().getRight().size()).boxed().map(i -> {
        return input.parallelStream().map(pair -> multiplyValues(asMap(pair.getRight().get(i)), pair.getLeft()))
                .reduce(new HashMap<>(), (map1, map2) -> sum(map1, map2));
    }).map(LibSVMUtils::asString).collect(toList());
}

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From source file:com.civprod.util.ChainListWrapper.java

public static <T> List<T> createList(Collection<T> inList) {
    java.util.function.Supplier<List<T>> SupplierFun = () -> {
        return org.apache.commons.collections4.list.SetUniqueList.setUniqueList(new ArrayList<T>());
    };//from   w ww.j a v a 2s . c om
    List<T> rList = inList.parallelStream().collect(SupplierFun, (List<T> coll, T curItem) -> {
        if (curItem instanceof ChainListWrapper) {
            coll.addAll(createList((ChainListWrapper) curItem));
        } else {
            coll.add(curItem);
        }
    }, List<T>::addAll);
    return rList;
}

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From source file:com.shenit.commons.utils.CollectionUtils.java

/**
 * Found out the item that col1 contains but col2 not contains.
 * @param col1 Collection 1/* w ww  .  j a v a 2 s. com*/
 * @param col2 Collection 2
 * @return The items only in col1 but not col2
 */
@SuppressWarnings("unchecked")
public static <T> Collection<T> diff(Collection<T> col1, Collection<T> col2) {
    if (ValidationUtils.isEmpty(col1))
        return col2;
    else if (ValidationUtils.isEmpty(col2))
        return col1;
    try {
        Collection<T> diff = col1.getClass().newInstance();
        col1.stream().forEach((item1) -> {
            if (col2.parallelStream().noneMatch((item2) -> ValidationUtils.eq(item1, item2))) {
                diff.add(item1);
            }
        });
        return diff;
    } catch (InstantiationException | IllegalAccessException e) {
        LOG.warn("[diff] Could not create instance for {} with empty parameter constructor", col1.getClass());
    }
    return null;
}

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From source file:com.adaptris.core.MessageLoggerImpl.java

protected Collection<MetadataElement> format(Collection<MetadataElement> set) {
    MetadataCollection metadata = new MetadataCollection();
    set.parallelStream().forEach(e -> {
        metadata.add(wrap(e.getKey(), e.getValue()));
    });//from  ww  w  .  j a v  a 2  s .  c o  m
    return metadata;
}

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From source file:edu.umd.umiacs.clip.tools.lang.TFIDFVector.java

public TFIDFVector(Collection<Triple<String, Integer, Integer>> terms, double logNumDocs) {
    double one_over_n_j = 1.0d / terms.parallelStream().mapToInt(Triple::getMiddle).sum();
    termToTFIDF = terms.stream().collect(toMap(Triple::getLeft,
            triple -> (triple.getMiddle() * one_over_n_j) * (logNumDocs - log(triple.getRight()))));
    normalize();//  ww w .  j ava  2 s.  c o m
}

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From source file:com.fitbur.jestify.junit.spring.IntegrationTestCreator.java

void create() {
    Map<DescriptorKey, ParameterDescriptor> parameterDescriptors = context.getParamaterDescriptors();
    Map<DescriptorKey, FieldDescriptor> fieldDescriptors = context.getFieldDescriptors();
    Object[] arguments = new Object[parameterDescriptors.size()];
    Collection<FieldDescriptor> descriptors = fieldDescriptors.values();

    Set<FieldDescriptor> mockDescriptors = descriptors.parallelStream().filter(p -> p.getMock().isPresent())
            .collect(toSet());/*w w w .j ava 2 s. c  om*/

    //process fields with a custom index first
    mockDescriptors.parallelStream().filter(p -> p.getMock().get().index() != -1)
            .map(p -> new IndexMockInjector(context, testReifier, appContext, p, arguments))
            .forEach(IndexMockInjector::inject);

    //process fields with custom names second
    mockDescriptors.parallelStream().filter(p -> !p.getMock().get().name().isEmpty())
            .map(p -> new NameMockInjector(context, testReifier, appContext, p, arguments))
            .forEach(NameMockInjector::inject);

    //process fields with type based injection
    mockDescriptors.parallelStream()
            .filter(p -> p.getMock().get().index() == -1 && p.getMock().get().name().isEmpty())
            .map(p -> new TypeMockInjector(context, testReifier, appContext, p, arguments))
            .forEach(TypeMockInjector::inject);

    //process fields with custom names second
    descriptors.parallelStream().filter(p -> !p.getMock().isPresent()
            && (p.getAnnotation(Inject.class).isPresent() || p.getAnnotation(Autowired.class).isPresent()))
            .map(p -> new RealInjector(context, testReifier, appContext, p, arguments))
            .forEach(RealInjector::inject);

    testReifier.reifyCut(context.getCutDescriptor(), arguments);
}

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From source file:de.kaiserpfalzEdv.office.contacts.contact.ContactDO.java

@SuppressWarnings("deprecation")
public void setAddresses(@NotNull final Collection<? extends Address> addresses) {
    HashSet<AddressDO> addressDOs = new HashSet<>(addresses.size());
    addresses.parallelStream().forEach(a -> addressDOs.add((AddressDO) a));

    setAddresses(addressDOs);//from  w w w .j a  v  a 2  s  .  c om
}

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