Examples with AggregateOperation com.mongodb.operation.AggregateOperation used on opensource projects

Example 1 with AggregateOperation

use of com.mongodb.operation.AggregateOperation in project mongo-java-driver by mongodb.

the class DBCollection method aggregate.

@SuppressWarnings("deprecation")
private Cursor aggregate(final List<? extends DBObject> pipeline, final AggregationOptions options, final ReadPreference readPreference, final boolean returnCursorForOutCollection) {
    if (options == null) {
        throw new IllegalArgumentException("options can not be null");
    }
    List<BsonDocument> stages = preparePipeline(pipeline);
    BsonValue outCollection = stages.get(stages.size() - 1).get("$out");
    if (outCollection != null) {
        AggregateToCollectionOperation operation = new AggregateToCollectionOperation(getNamespace(), stages, getWriteConcern()).maxTime(options.getMaxTime(MILLISECONDS), MILLISECONDS).allowDiskUse(options.getAllowDiskUse()).bypassDocumentValidation(options.getBypassDocumentValidation()).collation(options.getCollation());
        try {
            executor.execute(operation);
            if (returnCursorForOutCollection) {
                return new DBCursor(database.getCollection(outCollection.asString().getValue()), new BasicDBObject(), new DBCollectionFindOptions().readPreference(primary()).collation(options.getCollation()));
            } else {
                return null;
            }
        } catch (MongoWriteConcernException e) {
            throw createWriteConcernException(e);
        }
    } else {
        AggregateOperation<DBObject> operation = new AggregateOperation<DBObject>(getNamespace(), stages, getDefaultDBObjectCodec()).readConcern(getReadConcern()).maxTime(options.getMaxTime(MILLISECONDS), MILLISECONDS).allowDiskUse(options.getAllowDiskUse()).batchSize(options.getBatchSize()).useCursor(options.getOutputMode() == com.mongodb.AggregationOptions.OutputMode.CURSOR).collation(options.getCollation());
        BatchCursor<DBObject> cursor = executor.execute(operation, readPreference);
        return new MongoCursorAdapter(new MongoBatchCursorAdapter<DBObject>(cursor));
    }
}