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:edu.umd.umiacs.clip.tools.classifier.LibSVMUtils.java

public static List<String> filter(List<String> training, int threshold) {
    Set<Integer> filtered = training.stream().flatMap(line -> Stream.of(line.split(" ")).skip(1))
            .map(pair -> new Integer(pair.substring(0, pair.indexOf(":"))))
            .collect(groupingBy(i -> i, counting())).entrySet().stream()
            .filter(entry -> entry.getValue() >= threshold).map(Entry::getKey).collect(toSet());
    return training.stream().map(line -> line.split(" "))
            .map(fields -> fields[0] + " "
                    + String.join(" ", Stream.of(fields).skip(1).filter(
                            pair -> filtered.contains(new Integer(pair.substring(0, pair.indexOf(":")))))
                            .collect(toList())))
            .map(String::trim).collect(toList());
}

From source file:info.archinnov.achilles.internals.parser.validator.BeanValidator.java

public static void validateHasPartitionKey(AptUtils aptUtils, TypeName rawClassType,
        List<TypeParsingResult> parsingResults) {
    final boolean hasPartitionKey = parsingResults.stream()
            .filter(x -> x.context.columnType == ColumnType.PARTITION).count() > 0;

    aptUtils.validateTrue(hasPartitionKey,
            "The class '%s' should have at least 1 partition key (@PartitionKey)", rawClassType);
}

From source file:com.hubrick.raml.codegen.springweb.RestControllerClassGenerator.java

private static JExpression flushBuffer(List<String> stringBuffer) {
    final String str = stringBuffer.stream().collect(Collectors.joining(""));
    stringBuffer.clear();/*from ww  w.ja va2  s. co m*/
    return JExpr.lit(str);
}

From source file:com.epam.ta.reportportal.core.widget.content.WidgetContentProvider.java

/**
 * Transform chart data fields names to database known names using criteria
 * holder./*from w w w  .j  a  v a 2  s. co  m*/
 */
public static List<String> transformToDBStyle(CriteriaMap<?> criteriaMap, List<String> chartFields) {
    if (chartFields == null)
        return new ArrayList<>();
    return chartFields.stream().map(it -> {
        return criteriaMap.getCriteriaHolder(it).getQueryCriteria();
        //+ ((filterCriteria.getExtension() != null) ? "." + filterCriteria.getExtension() : "");
    }).collect(toList());
}

From source file:com.freiheit.fuava.sftp.util.FilenameUtil.java

/**
 * Returns all filenames from the given entryList which match the search
 * conditions./*from w  ww  .j a va2  s  . com*/
 */
public static List<String> getAllMatchingFilenames(final String requestedTimestamp, final FileType fileType,
        final List<String> entryList, @Nullable final RemoteFileStatus status) {
    return entryList.stream().filter(p -> p != null)
            .filter(f -> FilenameUtil.matchesSearchedFile(f, fileType, requestedTimestamp, status))
            .collect(Collectors.toList());

}

From source file:info.archinnov.achilles.internals.parser.validator.BeanValidator.java

public static boolean isCounterTable(AptUtils aptUtils, TypeName rawClassType,
        List<TypeParsingResult> parsingResults) {
    final boolean hasCounter = parsingResults.stream().filter(x -> x.context.columnType == ColumnType.COUNTER)
            .count() > 0;//ww w  .  j ava2  s. c  o m

    final boolean hasStaticCounter = parsingResults.stream()
            .filter(x -> x.context.columnType == ColumnType.STATIC_COUNTER).count() > 0;

    final boolean hasNormal = parsingResults.stream().filter(x -> x.context.columnType == ColumnType.NORMAL)
            .count() > 0;

    if (hasCounter || hasStaticCounter) {
        aptUtils.validateFalse(hasNormal, "Class '%s' should not mix counter and normal columns", rawClassType);
    }
    return hasCounter || hasStaticCounter;
}

From source file:internal.static_util.scorer.TermRelatednessScorer.java

/**
 * Helper method to run ScoredTerms through a filter and give the axe to ones that fall below the cutoff point.
 *
 * @param scoredTerms       A list of terms that have scores.
 * @param minRelevanceRatio The minimum score a term must have to avoid being cut.  If none is given,
 *                          #DEFAULT_CUTOFF_RATIO# is assumed.
 * @return A trimmed list of scored terms, containing only terms who scored greater than #minRelevanceRatio#
 *///from  ww  w .j a  va  2  s  .  c om
private static List<ScoredTerm> getRelevantTerms(List<ScoredTerm> scoredTerms, double minRelevanceRatio) {
    // If a cutoff is specified, use it, otherwise use the default.
    return scoredTerms.stream().filter(scoredTerm -> scoredTerm.getScore() >= minRelevanceRatio)
            .collect(Collectors.toList());
}

From source file:com.github.anba.es6draft.test262.Test262Strict.java

public static final Set<String> stringSet(List<?> xs) {
    Predicate<String> nonEmpty = ((Predicate<String>) String::isEmpty).negate();
    return xs.stream().filter(Objects::nonNull).map(Object::toString).filter(nonEmpty)
            .collect(Collectors.toSet());
}

From source file:de.metas.ui.web.window.datatypes.json.JSONDocumentLayoutElement.java

public static List<JSONDocumentLayoutElement> ofList(final List<DocumentLayoutElementDescriptor> elements,
        final JSONOptions jsonOpts) {
    return elements.stream().filter(jsonOpts.documentLayoutElementFilter())
            .map(element -> new JSONDocumentLayoutElement(element, jsonOpts))
            .collect(GuavaCollectors.toImmutableList());
}

From source file:alfio.controller.api.admin.ExtensionApiController.java

private static void ensureIdsArePresent(List<ExtensionMetadataValue> toUpdate,
        List<ExtensionParameterMetadataAndValue> system) {
    Set<Integer> validIds = system.stream().map(ExtensionParameterMetadataAndValue::getId)
            .collect(Collectors.toSet());
    Set<Integer> toUpdateIds = toUpdate.stream().map(ExtensionMetadataValue::getId).collect(Collectors.toSet());
    if (!validIds.containsAll(toUpdateIds)) {
        throw new IllegalStateException();
    }/*from  ww w.  j  a va  2 s  .c  o m*/
}