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:org.labkey.graphql.GraphQLController.java

public static List<GraphQLFieldDefinition> createFields(List<ColumnInfo> columns, Set<GraphQLType> types) {
    return columns.stream().map(col -> GraphQLController.createField(col, types)).collect(Collectors.toList());
}

From source file:de.bund.bfr.jung.JungUtils.java

static Line2D getLineInMiddle(Shape edgeShape) {
    GeneralPath path = new GeneralPath(edgeShape);
    float[] seg = new float[6];
    List<Point2D> points = new ArrayList<>();

    for (PathIterator i = path.getPathIterator(null, 1); !i.isDone(); i.next()) {
        i.currentSegment(seg);//from w w  w. j a  va 2  s. c o m
        points.add(new Point2D.Float(seg[0], seg[1]));
    }

    Point2D first = points.get(0);
    Point2D last = points.get(points.size() - 1);

    if (first.equals(last)) {
        Point2D minP = points.stream().min((p1, p2) -> Double.compare(p1.getY(), p2.getY())).get();

        return new Line2D.Float(minP, new Point2D.Float((float) (minP.getX() + 1.0), (float) minP.getY()));
    } else {
        for (int i = 0; i < points.size() - 1; i++) {
            Point2D p1 = points.get(i);
            Point2D p2 = points.get(i + 1);

            if (p2.distance(last) < p2.distance(first)) {
                Line2D ortho = getOrthogonal(new Line2D.Float(first, last));
                Point2D pp1 = getIntersection(new Line2D.Float(p1, p2), ortho);
                Point2D pp2 = new Point2D.Float((float) (pp1.getX() + last.getX() - first.getX()),
                        (float) (pp1.getY() + last.getY() - first.getY()));

                return new Line2D.Float(pp1, pp2);
            }
        }

        return null;
    }
}

From source file:com.vmware.photon.controller.api.frontend.utils.SecurityGroupUtils.java

/**
 * Merge the 'self' security groups to existing security groups.
 *
 * @param existingSecurityGroups Existing security groups including both inherited and self ones.
 * @param selfSecurityGroups     'self' security groups to be merged.
 * @return The merging result and security groups not being merged.
 *//*from w ww .  j a  v  a 2s .co  m*/
public static Pair<List<SecurityGroup>, List<String>> mergeSelfSecurityGroups(
        List<SecurityGroup> existingSecurityGroups, List<String> selfSecurityGroups) {

    checkNotNull(existingSecurityGroups, "Provided value for existingSecurityGroups is unacceptably null");
    checkNotNull(selfSecurityGroups, "Provided value for selfSecurityGroups is unacceptably null");

    List<SecurityGroup> mergedSecurityGroups = new ArrayList<>();
    List<String> securityGroupsNotMerged = new ArrayList<>();
    Set<String> inheritedSecurityGroupNames = new HashSet<>();

    existingSecurityGroups.stream().filter(g -> g.isInherited()).forEach(g -> {
        mergedSecurityGroups.add(g);
        inheritedSecurityGroupNames.add(g.getName());
    });

    selfSecurityGroups.forEach(g -> {
        if (!inheritedSecurityGroupNames.contains(g)) {
            mergedSecurityGroups.add(new SecurityGroup(g, false));
        } else {
            securityGroupsNotMerged.add(g);
        }
    });

    return Pair.of(mergedSecurityGroups, securityGroupsNotMerged);
}

From source file:com.netflix.spinnaker.halyard.deploy.deployment.v1.OrcaRunner.java

private static String formatId(String id) {
    if (id.length() == 0) {
        return id;
    }/*from  w w w  . ja  v  a2s.  c  o  m*/

    id = capitalize(id);
    List<Integer> breaks = new ArrayList<>();
    char[] arr = id.toCharArray();
    for (int i = 0; i < arr.length; i++) {
        char c = arr[i];
        if (Character.isUpperCase(c)) {
            breaks.add(i);
        }
    }

    breaks.add(id.length());

    if (breaks.size() == 1) {
        return id;
    }

    List<String> words = new ArrayList<>();

    int last = breaks.remove(0);
    while (breaks.size() > 0) {
        int curr = breaks.remove(0);
        String word = id.substring(last, curr);
        if (last != 0) {
            word = unCapitalize(word);
        }
        words.add(word);
        last = curr;
    }

    return words.stream().reduce("", (a, b) -> a + " " + b).trim();
}

From source file:net.hamnaberg.json.Collection.java

public static Collection create(Optional<URI> href, List<Link> links, List<Item> items, List<Query> queries,
        Optional<Template> template, Optional<Error> error) {
    ObjectNode obj = JsonNodeFactory.instance.objectNode();
    obj.put("version", Version.ONE.getIdentifier());
    href.ifPresent(value -> obj.put("href", value.toString()));
    if (!links.isEmpty()) {
        obj.set("links", links.stream().map(Extended::asJson).collect(JsonNodeFactory.instance::arrayNode,
                ArrayNode::add, ArrayNode::addAll));
    }//from  w  w w . j  a  v  a  2  s.c o m
    if (!items.isEmpty()) {
        obj.set("items", items.stream().map(Extended::asJson).collect(JsonNodeFactory.instance::arrayNode,
                ArrayNode::add, ArrayNode::addAll));
    }
    if (!queries.isEmpty()) {
        obj.set("queries", queries.stream().map(Extended::asJson).collect(JsonNodeFactory.instance::arrayNode,
                ArrayNode::add, ArrayNode::addAll));
    }
    template.ifPresent(value -> obj.set("template", value.asJson()));
    error.ifPresent(value -> obj.set("error", value.asJson()));
    Collection coll = new Collection(obj);
    coll.validate();
    return coll;
}

From source file:cn.com.sunjiesh.wechat.handler.WechatMaterialHandler.java

/**
 * ??// w w w  .j  ava  2s. c  o  m
 *
 * @param materialNewsList ??
 * @param accessToken AccessToken
 * @return 
 * @throws ServiceException ServiceException
 */
public static WechatAddMaterialNewsResponse addMaterialNews(List<MaterialNewsRequest> materialNewsList,
        String accessToken) throws ServiceException {
    //url and params
    String url = getRequestUrl(WechatUrlConstants.MATERIAL_ADD_NEWS, accessToken);
    JSONArray articleJsonArr = new JSONArray();
    materialNewsList.stream().map((media) -> materiaNewsToJsonObj(media)).forEach((articleJson) -> {
        articleJsonArr.add(articleJson);
    });
    JSONObject requestJson = new JSONObject();
    requestJson.put("articles", articleJsonArr);

    JSONObject responseJson = getWxJSONObjectResponseFromHttpPostMethod(url, requestJson);
    String mediaId = responseJson.getString("media_id");

    WechatAddMaterialNewsResponse response = new WechatAddMaterialNewsResponse();
    response.setMediaId(mediaId);
    return response;
}

From source file:io.pravega.controller.store.stream.tables.TableHelper.java

/**
 * Find segments from the candidate set that have overlapping key ranges with current segment.
 *
 * @param current    current segment number
 * @param candidates candidates//from w  ww . j  av a 2 s  .c om
 * @return
 */
public static List<Integer> getOverlaps(final Segment current, final List<Segment> candidates) {
    return candidates.stream().filter(x -> x.overlaps(current)).map(x -> x.getNumber())
            .collect(Collectors.toList());
}

From source file:cn.com.sunjiesh.wechat.handler.WechatMaterialHandler.java

/**
 * ??/*ww w . j  a v a  2s  . com*/
 *
 * @param mediaId mediaId
 * @param mediaList mediaList
 * @param index index
 * @param accessToken AccessToken
 * @throws ServiceException ServiceException
 */
public static void updateMaterialNews(String mediaId, List<MaterialNewsRequest> mediaList, Integer index,
        String accessToken) throws ServiceException {
    //url and params
    String url = getRequestUrl(WechatUrlConstants.MATERIAL_UPDATE_NEWS, accessToken);
    JSONArray articleJsonArr = new JSONArray();
    mediaList.stream().map((media) -> materiaNewsToJsonObj(media)).forEach((articleJson) -> {
        articleJsonArr.add(articleJson);
    });
    JSONObject requestJson = new JSONObject();
    requestJson.put("articles", articleJsonArr);
    requestJson.put("media_id", mediaId);
    requestJson.put("index", index);

    getWxJSONObjectResponseFromHttpPostMethod(url, requestJson);
}

From source file:io.pravega.controller.store.stream.tables.TableHelper.java

private static List<Integer> diff(List<Integer> list1, List<Integer> list2) {
    return list1.stream().filter(z -> !list2.contains(z)).collect(Collectors.toList());
}

From source file:com.simiacryptus.mindseye.applications.ArtistryUtil.java

/**
 * Reduce./*from   w w w.ja va 2  s  .  c  om*/
 *
 * @param network               the network
 * @param functions             the functions
 * @param parallelLossFunctions the parallel loss functions
 */
public static void reduce(final PipelineNetwork network, final List<Tuple2<Double, DAGNode>> functions,
        final boolean parallelLossFunctions) {
    functions.stream().filter(x -> x._1 != 0).reduce((a, b) -> {
        return new Tuple2<>(1.0,
                network.wrap(new BinarySumLayer(a._1, b._1), a._2, b._2).setParallel(parallelLossFunctions));
    }).get();
}