MongoDB aggregation with Java driver

Question

I need your help for using MongoDB aggregation framework with java driver. I don\'t understand how to write my request, even with this documentation.

I want to get t

Answer 1

Finally found the solution, I get the same result than with the original request.

Mongo Driver 3 :

Aggregate doc

MongoCollection collection = database.getCollection("myCollection");

AggregateIterable output = collection.aggregate(Arrays.asList(
        new Document("$unwind", "$views"),
        new Document("$match", new Document("views.isActive", true)),
        new Document("$sort", new Document("views.date", 1)),
        new Document("$limit", 200),
        new Document("$project", new Document("_id", 0)
                    .append("url", "$views.url")
                    .append("date", "$views.date"))
        ));

// Print for demo
for (Document dbObject : output)
{
    System.out.println(dbObject);
}

You can make it more readable with static import :
import static com.mongodb.client.model.Aggregates.*;.
See koulini answer for complet example.

Mongo Driver 2 :

Aggregate doc

Iterable output = collection.aggregate(Arrays.asList(
        (DBObject) new BasicDBObject("$unwind", "$views"),
        (DBObject) new BasicDBObject("$match", new BasicDBObject("views.isActive", true)),
        (DBObject) new BasicDBObject("$sort", new BasicDBObject("views.date", 1)),
        (DBObject) new BasicDBObject("$limit", 200),
        (DBObject) new BasicDBObject("$project", new BasicDBObject("_id", 0)
                    .append("url", "$views.url")
                    .append("date", "$views.date"))
        )).results();
    
// Print for demo
for (DBObject dbObject : output)
{
    System.out.println(dbObject);
}

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Query conversion logic : Thank to this link