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:dk.dma.ais.abnormal.analyzer.analysis.CloseEncounterAnalysis.java

/**
 * In the set of candidateTracks: find the candidateTracks which are near to the nearToTrack - with 'near'
 * defined as//from   ww w .  j a va2  s. c  o  m
 *
 * - last reported position timestamp within +/- 1 minute of nearToTrack's
 * - last reported position within 1 nm of nearToTrack
 *
 * @param candidateTracks the set of candidate candidateTracks to search among.
 * @param nearToTrack the nearToTrack to find other near-by candidateTracks for.
 * @return the set of nearby candidateTracks
 */
Set<Track> findNearByTracks(Collection<Track> candidateTracks, Track nearToTrack,
        int maxTimestampDeviationMillis, int maxDistanceDeviationMeters) {
    Set<Track> nearbyTracks = Collections.EMPTY_SET;

    TrackingReport positionReport = nearToTrack.getNewestTrackingReport();

    if (positionReport != null) {
        final long timestamp = positionReport.getTimestamp();

        nearbyTracks = candidateTracks.stream()
                .filter(candidateTrack -> candidateTrack.getMmsi() != nearToTrack.getMmsi()
                        && candidateTrack.getTimeOfLastPositionReport() > 0L
                        && candidateTrack.getTimeOfLastPositionReport() > timestamp
                                - maxTimestampDeviationMillis
                        && candidateTrack.getTimeOfLastPositionReport() < timestamp
                                + maxTimestampDeviationMillis
                        && candidateTrack.getPosition().distanceTo(nearToTrack.getPosition(),
                                CoordinateSystem.CARTESIAN) < maxDistanceDeviationMeters)
                .collect(toSet());
    }

    return nearbyTracks;
}

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From source file:io.pivotal.cla.service.github.MylynGitHubApi.java

private boolean hasObviousFixComment(Collection<? extends Comment> comments, String claUserLogin) {

    Optional<? extends Comment> obviousFixComment = comments.stream() //
            .filter(comment -> comment.getUser() != null && !claUserLogin.equals(comment.getUser().getLogin())) //
            .filter(comment -> comment.getBody().contains(OBVIOUS_FIX)) //
            .findFirst();/*from   w ww  . j  a v  a 2s . c  om*/

    return obviousFixComment.isPresent();
}

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From source file:delfos.rs.trustbased.WeightedGraph.java

public WeightedGraph(Collection<Node> nodes, Set<PathBetweenNodes<Node>> edges) {
    validateEdges(edges);//from  w w  w .ja  va2 s  . co  m

    nodesIndex = makeIndex(nodes.stream().sorted().collect(Collectors.toList()));
    nodesByIndex = makeNodesByIndex(nodesIndex);

    double[][] matrix = makeMatrixFromEdges(edges);

    adjMatrixEdgeWeightedDigraph = makeWeightedDiGraph(nodesIndex, matrix);

    validateWeightsGraph(adjMatrixEdgeWeightedDigraph);
}

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From source file:delfos.group.experiment.validation.groupformation.GroupFormationTechnique_cache.java

private Collection<GroupOfUsers> actuallyGenerateGroups(DatasetLoader<? extends Rating> datasetLoader,
        GroupFormationTechnique groupFormationTechnique) {
    Collection<GroupOfUsers> groupsGenerated;
    int ratingsDatasetHashCode = datasetLoader.getRatingsDataset().hashCode();
    String datasetLoaderAlias = datasetLoader.getAlias();
    String groupFormationString = "_gftHash=" + groupFormationTechnique.hashCode();
    String datasetLoaderString = "_datasetLoader=" + datasetLoaderAlias + "_DLHash=" + ratingsDatasetHashCode;

    File file = new File(getDirectory().getPath() + File.separator + groupFormationTechnique.getName()
            + groupFormationString + datasetLoaderString);

    try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
        Collection<Collection<Integer>> groupsByIdUser = (Collection<Collection<Integer>>) ois.readObject();
        if (groupsByIdUser == null) {
            Global.showWarning("The loaded group formation is null. (GroupFormationTechnique: "
                    + groupFormationTechnique.getClass().getName() + ")");
            throw new IllegalStateException("The loaded group formation is null. (GroupFormationTechnique: "
                    + groupFormationTechnique.getClass().getName() + ")");
        }//from w ww. ja v  a 2  s .  c o  m

        groupsGenerated = groupsByIdUser.stream().map(groupOfUsers -> groupOfUsers.stream()
                .map(idUser -> datasetLoader.getUsersDataset().get(idUser)).collect(Collectors.toList()))
                .map(users -> new GroupOfUsers(users)).collect(Collectors.toList());

        return groupsGenerated;
    } catch (NotSerializableException ex) {
        Global.showWarning("The system " + this.getClass() + " has a model not serializable.");
        throw new UnsupportedOperationException(ex);
    } catch (Throwable anyException) {
        Global.showMessageTimestamped("Generating groups: " + file.getAbsolutePath() + "\n");

        final GroupFormationTechniqueProgressListener_default listener = new GroupFormationTechniqueProgressListener_default(
                System.out, 300000);
        if (Global.isInfoPrinted()) {
            groupFormationTechnique.addListener(listener);
        }
        groupsGenerated = groupFormationTechnique.generateGroups(datasetLoader);
        if (Global.isInfoPrinted()) {
            groupFormationTechnique.removeListener(listener);
        }

        //Save groups
        if (FileUtilities.createDirectoriesForFileIfNotExist(file)) {
            Global.showWarning("Created directory path " + file.getAbsoluteFile().getParentFile()
                    + " for recommendation model");
        }

        Collection<Collection<Integer>> groupsGeneratedIDs = groupsGenerated.stream()
                .map(group -> group.getIdMembers()).collect(Collectors.toList());

        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file))) {
            oos.writeObject(groupsGeneratedIDs);
        } catch (NotSerializableException ex) {
            Global.showWarning("The system " + this.getClass() + " has a model not serializable.");
            throw new UnsupportedOperationException(ex);
        } catch (Throwable ex) {
            throw new IllegalStateException(ex);
        }
    }
    return groupsGenerated;
}

---

From source file:de.ks.flatadocdb.session.Session.java

private SessionEntry loadSessionEntry(IndexElement indexElement) {
    Objects.requireNonNull(indexElement);
    EntityDescriptor descriptor = metaModel.getEntityDescriptor(indexElement.getEntityClass());
    HashMap<Relation, Collection<String>> relationIds = new HashMap<>();
    descriptor.getAllRelations().forEach(rel -> relationIds.put(rel, new ArrayList<>()));
    EntityPersister persister = descriptor.getPersister();
    Object object = persister.load(repository, descriptor, indexElement.getPathInRepository(), relationIds);
    SessionEntry sessionEntry = new SessionEntry(object, indexElement.getId(), descriptor.getVersion(object),
            indexElement.getNaturalId(), indexElement.getPathInRepository(), descriptor);
    descriptor.writePathInRepo(object, indexElement.getPathInRepository());

    byte[] md5Sum = indexElement.getMd5Sum();
    sessionEntry.setMd5(md5Sum);/*w ww  .  ja  v  a 2  s  . c  o  m*/
    if (md5Sum == null) {
        try (FileInputStream stream = new FileInputStream(indexElement.getPathInRepository().toFile())) {
            sessionEntry.setMd5(DigestUtils.md5(stream));
        } catch (IOException e) {
            log.error("Could not get md5sum from {}", indexElement.getPathInRepository(), e);
        }
    }

    Path rootFolder = descriptor.getFolderGenerator().getFolder(repository, repository.getPath(), object);
    boolean isChild = !rootFolder.equals(sessionEntry.getCompletePath().getParent());
    sessionEntry.setChild(isChild);

    log.trace("Loaded {}", object);
    addToSession(sessionEntry);

    for (Map.Entry<Relation, Collection<String>> entry : relationIds.entrySet()) {
        Relation relation = entry.getKey();
        Collection<String> ids = entry.getValue();
        if (relation.isLazy()) {
            relation.setupLazy(object, ids, this);
        } else {
            List<Object> relatedEntities = ids.stream().sequential().map(this::findById).filter(o -> o != null)
                    .collect(Collectors.toList());
            relation.setRelatedEntities(object, relatedEntities);
        }
    }
    return sessionEntry;
}

---

From source file:com.haulmont.cuba.core.app.importexport.EntityImportExport.java

protected Collection<? extends Entity> reloadEntities(Collection<? extends Entity> entities, View view) {
    List<Object> ids = entities.stream().map(Entity::getId).collect(Collectors.toList());

    MetaClass metaClass = metadata.getClassNN(view.getEntityClass());
    LoadContext.Query query = LoadContext
            .createQuery("select e from " + metaClass.getName() + " e where e.id in :ids")
            .setParameter("ids", ids);
    LoadContext<? extends Entity> ctx = LoadContext.create(view.getEntityClass()).setQuery(query).setView(view);

    return dataManager.loadList(ctx);
}

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From source file:com.github.drbookings.model.data.manager.MainManager.java

private BookingBean findBooking(final LocalDate date, final String roomName) throws MatchException {
    final int maxCount = 100;
    int count = 0;
    LocalDate date2 = date;/* ww  w .ja v a  2  s  . c o  m*/
    Collection<BookingBean> result2 = null;
    do {
        result2 = bookingEntries.get(date2).stream().filter(b -> b.getRoom().getName().equals(roomName))
                .filter(b -> !b.isCheckIn()).map(b -> b.getElement()).collect(Collectors.toSet());
        if (result2.stream().anyMatch(b -> b.getCleaning() != null)) {
            if (logger.isDebugEnabled()) {
                logger.debug("Found entry with cleaning, aborting");
            }
            throw new MatchException("Failed to find matching booking for " + date + " and " + roomName);
        }
        result2 = result2.stream().filter(b -> b.getCleaning() == null).collect(Collectors.toSet());
        count++;
        date2 = date2.minusDays(1);
    } while ((result2 == null || result2.isEmpty()) && count < maxCount);
    if (count == maxCount) {
        throw new MatchException("Failed to find matching booking for " + date + " and " + roomName);
    }
    if (result2.size() > 1) {
        throw new MatchException("Found more than one matching booking");
    }
    return result2.iterator().next();

}

---

From source file:cz.lbenda.dataman.db.DbStructureFactory.java

private void generatePKColumns(Collection<CatalogDesc> catalogs, DatabaseMetaData dmd) throws SQLException {
    SQLDialect di = dbConfig.getJdbcConfiguration().getDialect();

    StatusHelper.getInstance().progressNextStep(this, STEP_READ_PRIMARY_KEYS,
            catalogs.stream().mapToInt(
                    cat -> cat.getSchemas().stream().mapToInt(schema -> schema.getTables().size()).sum())
                    .sum());//from w w w.  ja  v a  2  s.  c o  m
    for (CatalogDesc ch : catalogs) {
        for (SchemaDesc schema : ch.getSchemas()) {
            for (TableDesc td : schema.getTables()) {
                StatusHelper.getInstance().progress(this);
                try (ResultSet rsPk = dmd.getPrimaryKeys(ch.getName(), schema.getName(), td.getName())) {
                    while (rsPk.next()) {
                        ColumnDesc column = td.getColumn(rsPk.getString(di.pkColumnName()));
                        if (column == null) {
                            LOG.error("The primary column not exist in whole column set of table: "
                                    + di.pkColumnName());
                        } else {
                            column.setPK(true);
                        }
                    }
                }
            }
        }
    }
}

---

From source file:com.github.drbookings.ui.controller.UpcomingController.java

private void addEvents(final LocalDate date, final Collection<BookingEntry> upcomingBookings,
        final Collection<CleaningEntry> upcomingCleanings) {
    final VBox box = new VBox(4);
    if (date.equals(LocalDate.now())) {
        box.getStyleClass().add("first-day");
    } else if (date.equals(LocalDate.now().plusDays(1))) {
        box.getStyleClass().add("second-day");
    } else if (date.isAfter(LocalDate.now().plusDays(1))) {
        box.getStyleClass().add("later");
    }/* ww  w .  j av  a2 s. c  om*/

    if (upcomingBookings.stream().filter(b -> b.isCheckIn() || b.isCheckOut()).collect(Collectors.toList())
            .isEmpty() && upcomingCleanings.isEmpty()) {
        final Text t0 = new Text(getDateString(date));
        final Text t1 = new Text(" there are no events.");
        t0.getStyleClass().add("emphasis");
        final TextFlow tf = new TextFlow();
        tf.getChildren().addAll(t0, t1);
        box.getChildren().addAll(tf);
    } else {
        final List<CheckInOutDetails> checkInNotes = Collections.synchronizedList(new ArrayList<>());
        final List<CheckInOutDetails> checkOutNotes = Collections.synchronizedList(new ArrayList<>());
        upcomingBookings.forEach(b -> {
            if (b.isCheckIn()) {
                String note = "";
                if (b.getElement().getCheckInNote() != null) {
                    note = b.getElement().getCheckInNote();
                }
                if (b.getElement().getSpecialRequestNote() != null) {
                    note = note + "\n" + b.getElement().getSpecialRequestNote();
                }
                checkInNotes.add(new CheckInOutDetails(b.getRoom().getName(),
                        b.getElement().getBookingOrigin().getName(), note));
            } else if (b.isCheckOut()) {
                checkOutNotes.add(new CheckInOutDetails(b.getRoom().getName(),
                        b.getElement().getBookingOrigin().getName(), b.getElement().getCheckOutNote()));
            }
        });
        Collections.sort(checkInNotes);
        Collections.sort(checkOutNotes);
        addGeneralSummary(date, box, checkInNotes);
        addCheckOutSummary(date, box, checkOutNotes);
        addCheckOutNotes(date, box, checkOutNotes);
        addCheckInSummary(date, box, checkInNotes);
        addCheckInNotes(date, box, checkInNotes);
        addCleaningSummary(date, box, upcomingCleanings);
        addCleanings(date, box, upcomingCleanings);
    }

    this.box.getChildren().add(box);

}

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