Examples of com.mongodb.DBCollection.aggregate()

com.mongodb.DBCollection.aggregate()
Method implements aggregation framework. @param firstOp requisite first operation to be performed in the aggregation pipeline @param additionalOps additional operations to be performed in the aggregation pipeline @return the aggregation operation's result set @deprecated Use {@link com.mongodb.DBCollection#aggregate(java.util.List)} instead @mongodb.driver.manual core/aggregation-pipeline/ Aggregation @mongodb.server.release 2.2


        // Allow body to be a pipeline
        // @see http://docs.mongodb.org/manual/core/aggregation/
        if (query instanceof BasicDBList) {
            BasicDBList queryList = (BasicDBList)query;
            aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), queryList
                .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
        } else {
            aggregationResult = dbCol.aggregate(query);
        }

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        if (query instanceof BasicDBList) {
            BasicDBList queryList = (BasicDBList)query;
            aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), queryList
                .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
        } else {
            aggregationResult = dbCol.aggregate(query);
        }


        dbIterator = aggregationResult.results();
        Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.aggregate);
        resultMessage.setBody(dbIterator);

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            // Allow body to be a pipeline
            // @see http://docs.mongodb.org/manual/core/aggregation/
            if (query instanceof BasicDBList) {
                BasicDBList queryList = (BasicDBList)query;
                aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), (BasicDBObject[])queryList
                    .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
            } else {
                aggregationResult = dbCol.aggregate(query);
            }

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            if (query instanceof BasicDBList) {
                BasicDBList queryList = (BasicDBList)query;
                aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), (BasicDBObject[])queryList
                    .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
            } else {
                aggregationResult = dbCol.aggregate(query);
            }


            dbIterator = aggregationResult.results();
            Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.aggregate);
            resultMessage.setBody(dbIterator);

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            // Allow body to be a pipeline
            // @see http://docs.mongodb.org/manual/core/aggregation/
            if (query instanceof BasicDBList) {
                BasicDBList queryList = (BasicDBList)query;
                aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), queryList
                    .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
            } else {
                aggregationResult = dbCol.aggregate(query);
            }

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            if (query instanceof BasicDBList) {
                BasicDBList queryList = (BasicDBList)query;
                aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), queryList
                    .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
            } else {
                aggregationResult = dbCol.aggregate(query);
            }


            dbIterator = aggregationResult.results();
            Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.aggregate);
            resultMessage.setBody(dbIterator);

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        // Allow body to be a pipeline
        // @see http://docs.mongodb.org/manual/core/aggregation/
        if (query instanceof BasicDBList) {
            BasicDBList queryList = (BasicDBList)query;
            aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), queryList
                .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
        } else {
            aggregationResult = dbCol.aggregate(query);
        }

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        if (query instanceof BasicDBList) {
            BasicDBList queryList = (BasicDBList)query;
            aggregationResult = dbCol.aggregate((DBObject)queryList.get(0), queryList
                .subList(1, queryList.size()).toArray(new BasicDBObject[queryList.size() - 1]));
        } else {
            aggregationResult = dbCol.aggregate(query);
        }


        dbIterator = aggregationResult.results();
        Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.aggregate);
        resultMessage.setBody(dbIterator);

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                    Template helloTemplate = configuration.getTemplate("answer.ftl");


                    // Not necessary yet to understand this.  It's just to prove that you
                    // are able to run a command on a mongod server
                    AggregationOutput output =
                            collection.aggregate(
                                    new BasicDBObject("$group",
                                            new BasicDBObject("_id", "$value")
                                                    .append("count", new BasicDBObject("$sum", 1)))
                                    ,
                                    new BasicDBObject("$match", new BasicDBObject("count",

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        // Finally the $sort operation
        DBObject sort = new BasicDBObject("$sort", new BasicDBObject("average", -1));


        // run aggregation
        List<DBObject> pipeline = Arrays.asList(match, project, group, sort);
        AggregationOutput output = coll.aggregate(pipeline);


        // Output the results
        for (DBObject result : output.results()) {
            System.out.println(result);
        }

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