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

                .batchSize(100)
                .outputMode(AggregationOptions.OutputMode.CURSOR)
                .allowDiskUse(true)
                .build();


        Cursor cursor = coll.aggregate(pipeline, aggregationOptions);
        while (cursor.hasNext()) {
            System.out.println(cursor.next());
        }


        // clean up

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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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    @Test
    public void articleTagToAuthorWithoutLibraryTest() {
        String testName = "articleTagToAuthorTest";
        DBCollection collection = getCollection(testName);
        insertArticle1(collection);
        AggregationOutput output = collection.aggregate(
            new BasicDBObject("$project", new BasicDBObject()
                .append("author", 1)
                .append("tags", 1)
            ),
            new BasicDBObject("$unwind", "$tags"),

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        DBCollection collection = database.getCollection("funnynumbers");


        // 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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