Class MongoDBQueryEvaluator

java.lang.Object

fr.inria.rules.integraal.storage.external.evaluator.MongoDBQueryEvaluator

All Implemented Interfaces:

NativeQueryEvaluator<String, com.mongodb.client.MongoCursor<org.bson.Document>>

public class MongoDBQueryEvaluator
extends Object
implements NativeQueryEvaluator<String, com.mongodb.client.MongoCursor<org.bson.Document>>

Sends a MongoDB query This evaluator uses com.mongodb MongoClient to send the query. The result is a MongoCursor

Author:

Florent Tornil

Constructor Summary

Constructors

Constructor	Description
MongoDBQueryEvaluator(String uri, String database_name, String collection_name)	Creates a new driver over the given mongodb string
MongoDBQueryEvaluator(String host, String user, String password, String database, String collection)	Creates a new driver using the given parameters

Method Summary

Modifier and Type	Method	Description
Optional<com.mongodb.client.MongoCursor<org.bson.Document>>	evaluate(String query)	Evaluate the given query and returns the result This should not do anymore work

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MongoDBQueryEvaluator

public MongoDBQueryEvaluator(String host,
 String user,
 String password,
 String database,
 String collection)

Creates a new driver using the given parameters

Parameters:

host - the hostname/IP of the database

user - the username used to connect to the database

password - the password used to connect to the database

database - the database name

collection - the collection name

MongoDBQueryEvaluator

public MongoDBQueryEvaluator(String uri,
 String database_name,
 String collection_name)

Creates a new driver over the given mongodb string

Parameters:

uri - mongodb connection uri

database_name - the database name

collection_name - the collection name

Method Details

evaluate

public Optional<com.mongodb.client.MongoCursor<org.bson.Document>> evaluate(String query)

Description copied from interface: NativeQueryEvaluator

Evaluate the given query and returns the result This should not do anymore work

Specified by:

evaluate in interface NativeQueryEvaluator<String, com.mongodb.client.MongoCursor<org.bson.Document>>

Parameters:

query - to evaluate

Returns:

an optional which contains the results of the query if everything went right, an empty optional otherwise