Class SQLQueryEvaluator

java.lang.Object

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

All Implemented Interfaces:

NativeQueryEvaluator<String, List<Object[]>>

public class SQLQueryEvaluator
extends Object
implements NativeQueryEvaluator<String, List<Object[]>>

Evaluates a SQL query using the associated driver. This evaluator uses Apache's QueryRunner to execute the query on the database The result is a List<Object[]> which represents the list of all resulting tuples.
This evaluator also provides additional methods for inserting data on the database.

Constructor Summary

Constructors

Constructor	Description
SQLQueryEvaluator(RDBMSDriver driver)	Construct a new evaluator over the database represented by the given driver

Method Summary

Modifier and Type	Method	Description
Optional<List<Object[]>>	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

SQLQueryEvaluator

public SQLQueryEvaluator(RDBMSDriver driver)
                  throws SQLException

Construct a new evaluator over the database represented by the given driver

Parameters:

driver - representing the database to connect to

Throws:

SQLException - if the initial connection to the database cannot be performed

Method Details

evaluate

public Optional<List<Object[]>> 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, List<Object[]>>

Parameters:

query - to evaluate

Returns:

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