Example usage for com.mongodb DBCursor skip

Introduction

In this page you can find the example usage for com.mongodb DBCursor skip.

Prototype

public DBCursor skip(final int numberOfElements)

Source Link

Document

Discards a given number of elements at the beginning of the cursor.

Usage

From source file:org.vertx.mods.MongoPersistor.java

License:Apache License

private void doFind(Message<JsonObject> message) {
    String collection = getMandatoryString("collection", message);
    if (collection == null) {
        return;//from w  w  w.j  a  v a 2s .  c o m
    }
    Integer limit = (Integer) message.body.getNumber("limit");
    if (limit == null) {
        limit = -1;
    }
    Integer skip = (Integer) message.body.getNumber("skip");
    if (skip == null) {
        skip = -1;
    }

    Integer batchSize = (Integer) message.body.getNumber("batch_size");
    if (batchSize == null) {
        batchSize = 100;
    }
    JsonObject matcher = getMandatoryObject("matcher", message);
    if (matcher == null) {
        return;
    }
    JsonObject keys = message.body.getObject("keys");

    Object sort = message.body.getField("sort");
    DBCollection coll = db.getCollection(collection);
    DBCursor cursor = (keys == null) ? coll.find(jsonToDBObject(matcher))
            : coll.find(jsonToDBObject(matcher), jsonToDBObject(keys));
    if (skip != -1) {
        cursor.skip(skip);
    }
    if (limit != -1) {
        cursor.limit(limit);
    }
    if (sort != null) {
        cursor.sort(sortObjectToDBObject(sort));
    }
    sendBatch(message, cursor, batchSize);
}

From source file:org.wikidata.couchbase.MongoPersistHandler.java

License:Open Source License

@Override
public List<DBObject> load(int start, int limit) {
    DBCursor cursor = getCollection().find();
    cursor.skip(start);
    cursor.limit(limit);/*from   w ww  . j av  a  2s .  c o m*/
    List<DBObject> result = new LinkedList<DBObject>();
    try {
        while (cursor.hasNext()) {
            result.add(cursor.next());
        }
    } finally {
        cursor.close();
    }
    return result;
}