Пример Aggregation.ObjectOperators.ObjectToArray

Question

Необходимо реализовать в Java с использованием Aggregation.ObjectOperators.ObjectToArray

db.countries.aggregate([
 { "$addFields": { "country": { "$objectToArray": "$countryMap" } } },
 { "$unwind" : "$country" },
 { "$unwind" : "$country.v" },
 { "$project": {"_id":"$country.v._id","Name":"$country.v.Name" ,"populateRate":"$country.v.populateRate", 
   } },
 { "$sort" : { "Name" : -1 } },
 {"$skip": 0 },
 {"$limit": 25 }
]);