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.github.horrorho.liquiddonkey.util.Bytes.java

public static String hex(Collection<ByteString> byteStrings) {
    return byteStrings == null ? "null"
            : byteStrings.stream().map(Bytes::hex).collect(Collectors.toList()).toString();
}

From source file:fi.luontola.cqrshotel.JsonSerializationTest.java

private static <T> T pickRandom(Collection<T> values) {
    ThreadLocalRandom random = ThreadLocalRandom.current();
    return values.stream().skip(random.nextInt(values.size())).findFirst().get();
}

From source file:de.javagl.jgltf.model.io.JsonError.java

/**
 * Create a list of strings describing the JSON path for the given
 * stream context//from w w w . jav a  2s  .c  om
 * 
 * @param streamContext The stream context
 * @return The string list
 */
private static List<String> createJsonPath(JsonStreamContext streamContext) {
    Collection<JsonStreamContext> list = expand(streamContext);
    return list.stream().map(c -> c.getCurrentName() == null ? "" : c.getCurrentName())
            .collect(Collectors.toList());
}

From source file:it.ozimov.springboot.templating.mail.utils.EmailToMimeMessageTest.java

private static List<Address> toAddress(final Collection<InternetAddress> internetAddresses) {
    return internetAddresses.stream().map(internetAddress -> (Address) internetAddress).collect(toList());
}

From source file:org.lightjason.agentspeak.action.buildin.rest.IBaseRest.java

/**
 *
 * transforms a collection into a term stream
 *
 * @param p_collection collection/*w  w w. j  a  v a 2  s  .c  om*/
 * @return term stream
 */
private static Stream<ITerm> flatcollection(final Collection<?> p_collection) {
    return p_collection.stream().flatMap(IBaseRest::flatterm);
}

From source file:com.hortonworks.registries.storage.util.StorageUtils.java

public static void ensureUnique(Storable storable,
        Function<List<QueryParam>, Collection<? extends Storable>> listFn, List<QueryParam> queryParams) {
    Collection<? extends Storable> storables = listFn.apply(queryParams);
    Optional<Long> entities = storables.stream().map(Storable::getId).filter(x -> !x.equals(storable.getId()))
            .findAny();/*ww  w .j  a v a2 s .co  m*/
    if (entities.isPresent()) {
        throw new DuplicateEntityException("Entity with '" + queryParams + "' already exists");
    }
}

From source file:com.liferay.ide.core.util.FileListing.java

public static List<IPath> getFileListing(File dir, String fileType) {
    Collection<File> files = FileUtils.listFiles(dir, new String[] { fileType }, true);

    Stream<File> stream = files.stream();

    return stream.filter(file -> file.exists()).map(file -> new Path(file.getPath()))
            .collect(Collectors.toList());
}

From source file:ch.rasc.edsutil.PropertyComparatorFactory.java

@SuppressWarnings("unchecked")
public static <T> Comparator<T> createComparatorFromSorters(Collection<SortInfo> sortInfos) {
    Comparator<T> comparator = null;

    if (sortInfos != null) {
        comparator = sortInfos.stream()
                .map(a -> (Comparator<T>) createComparator(a.getProperty(), a.getDirection()))
                .reduce(comparator, (a, b) -> a != null ? a.thenComparing(b) : b);
    }//from   ww w  .j a  v a2 s . co m

    return comparator;
}

From source file:ch.rasc.edsutil.PropertyComparatorFactory.java

@SuppressWarnings("unchecked")
public static <T> Comparator<T> createComparatorFromGroups(Collection<GroupInfo> groupInfos) {
    Comparator<T> comparator = null;

    if (groupInfos != null) {
        comparator = groupInfos.stream()
                .map(a -> (Comparator<T>) createComparator(a.getProperty(), a.getDirection()))
                .reduce(comparator, (a, b) -> a != null ? a.thenComparing(b) : b);
    }//w w  w  .j  ava2 s.  c  o  m

    return comparator;
}

From source file:com.github.erchu.beancp.MapperExecutorSelector.java

/**
 * Returns first value in {@code collection} which is not equal to null and matches filter. If
 * there is not such element then will return null.
 *
 * @param <T> result type.//  ww w.j a  v  a  2  s. c  om
 * @param collection collection to search in.
 * @param filter filter predicate.
 * @return first value in {@code collection} which is not equal to null and matches filter, if
 * there is not such element then will return null.
 */
private static <T> T firstOrNull(final Collection<T> collection, final Predicate<T> filter) {
    Optional<T> findFirst = collection.stream().filter(filter).findFirst();

    return (findFirst.isPresent() ? findFirst.get() : null);
}