Example usage for com.mongodb.client.model Filters exists

Introduction

In this page you can find the example usage for com.mongodb.client.model Filters exists.

Prototype

public static Bson exists(final String fieldName) 

Source Link

Document

Creates a filter that matches all documents that contain the given field.

Usage

From source file:com.jaeksoft.searchlib.crawler.cache.MongoDbCrawlCache.java

License:Open Source License

@Override
public long flush(long expiration) throws IOException {
    rwl.r.lock();//from   w ww .j  av  a  2 s . com
    try {
        final Bson filter = expiration == 0 ? Filters.exists("uri")
                : Filters.lt("_id", new ObjectId(new Date(expiration)));
        indexedCollection.deleteMany(filter);
        for (GridFSFile f : contentGrid.find(filter))
            contentGrid.delete(f.getObjectId());
        long l = metaCollection.deleteMany(filter).getDeletedCount();
        return l;
    } finally {
        rwl.r.unlock();
    }
}

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From source file:io.lumeer.storage.mongodb.dao.collection.MongoDataDao.java

License:Open Source License

private Bson createFilter(String collectionId, SearchQuery query) {
    List<Bson> filters = new ArrayList<>();
    // does not work as expected - cannot search for a single character for example, only whole words
    if (query.isFulltextQuery()) {

        Collection collection = collectionDao.getCollectionById(collectionId);
        List<Attribute> fulltextAttrs = collection.getAttributes().stream()
                .filter(attr -> attr.getName().toLowerCase().contains(query.getFulltext().toLowerCase()))
                .collect(Collectors.toList());

        // we only search by presence of the matching attributes
        if (fulltextAttrs.size() > 0) {
            filters.add(Filters.or(fulltextAttrs.stream().map(attr -> Filters.exists(attr.getId()))
                    .collect(Collectors.toList())));
        } else if (collection.getAttributes().size() > 0) { // we search by content
            filters.add(Filters.or(collection.getAttributes().stream()
                    .map(attr -> Filters.regex(attr.getId(), query.getFulltext(), "i"))
                    .collect(Collectors.toList())));
        }/*from  ww w  . ja v a2s .  c o m*/
    }
    if (query.isDocumentIdsQuery()) {
        List<ObjectId> ids = query.getDocumentIds().stream().filter(ObjectId::isValid).map(ObjectId::new)
                .collect(Collectors.toList());
        if (!ids.isEmpty()) {
            filters.add(Filters.in(ID, ids));
        }
    }
    if (query.isFiltersQuery()) {
        List<Bson> attributeFilters = query.getFilters().stream().map(this::attributeFilter)
                .filter(Objects::nonNull).collect(Collectors.toList());
        filters.addAll(attributeFilters);
    }

    final Bson result = filters.size() > 0 ? Filters.and(filters) : new Document();
    return result;
}

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From source file:org.dcache.sf.FlushTask.java

License:Open Source License

@Override
public Set<URI> poll() throws URISyntaxException {
    FindIterable<Document> result = files
            .find(Filters.and(Filters.eq("pnfsid", pnfsId.getId()), Filters.exists("bfid")));
    final Set<URI> uris = new HashSet<>();
    result.forEach(new Block<Document>() {
        @Override//  w  ww .j  a va  2  s  .  co  m
        public void apply(Document document) {
            try {
                String uriString = document.get("bfid").toString();
                uris.add(new URI(uriString));
            } catch (URISyntaxException e) {
                System.out.println(e.getMessage());
            }
        }
    });
    return uris;
}

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From source file:org.eclipse.ditto.services.thingsearch.persistence.read.expression.visitors.GetExistsBsonVisitor.java

License:Open Source License

@Override
Bson visitRootLevelField(final String fieldName) {
    return Filters.exists(fieldName);
}

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From source file:twitterapp.TweetsProcessing.java

/**
 * @param args the command line arguments
 *//*www .  j  a  va 2 s .  com*/
public static void main(String[] args) throws JSONException {

    //createSeparateEntities(); 
    //create the collections with the separate entities that are extracted from the tweet collections

    //creating separate collections from the entities (hashtags collection, mentioned collection etc)
    String[] collections = { "separateEntities", "separateEntities2", "separateEntities3",
            "separateEntities4" };

    for (int p = 0; p < collections.length; p++) {
        MongoClient mongo = new MongoClient("localhost", 27017);
        MongoDatabase database = mongo.getDatabase("myTweetdb");

        int counterHashtag = 0;
        int counterMentioned = 0;
        int counterUrl = 0;
        int counterRetweeted = 0;

        Bson filter = Filters.exists("hashtag");
        MongoCollection<Document> h = database.getCollection("hashtagAll");
        Iterator<Document> h2 = database.getCollection(collections[p]).find(filter).iterator();
        while ((h2.hasNext()) && (counterHashtag < 250)) {
            Document doc = h2.next();
            h.insertOne(doc);
            counterHashtag++;
        }
        filter = Filters.exists("mentioned_users");
        MongoCollection<Document> m = database.getCollection("mentionedAll");
        h2 = database.getCollection(collections[p]).find(filter).iterator();
        while ((h2.hasNext()) && (counterMentioned < 250)) {
            Document doc = h2.next();
            m.insertOne(doc);
            counterMentioned++;
        }
        filter = Filters.exists("url");
        MongoCollection<Document> u = database.getCollection("urlAll");
        h2 = database.getCollection(collections[p]).find(filter).iterator();
        while ((h2.hasNext()) && (counterUrl < 250)) {
            Document doc = h2.next();
            u.insertOne(doc);
            counterUrl++;
        }
        filter = Filters.exists("retweeted_tweet");
        MongoCollection<Document> r = database.getCollection("retweetedAll");
        h2 = database.getCollection(collections[p]).find(filter).iterator();
        while ((h2.hasNext()) && (counterRetweeted < 250)) {
            Document doc = h2.next();
            r.insertOne(doc);
            counterRetweeted++;
        }
    }

}

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