org.exolab.castor.jdo.engine

Class SimpleQueryExecutor

java.lang.Object

org.exolab.castor.jdo.engine.SimpleQueryExecutor

public class SimpleQueryExecutor
extends java.lang.Object

A class to execute simple SQL queries generated from OQL. If the query only returns dependant values, or the results of SQL Functions or operations, then we don't need to use the whole persistence framework, and this class will execute the query, and return results.

Version:

$Revision: 7130 $ $Date: 2006-03-14 06:22:05 -0700 (Tue, 14 Mar 2006) $

Author:

Nissim Karpenstein

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	SimpleQueryExecutor.SimpleQueryResults

Constructor Summary

Constructors

Constructor and Description
SimpleQueryExecutor(Database database) Creates an instance to execute a simple query.

Method Summary

Methods

Modifier and Type	Method and Description
QueryResults	execute(java.sql.Connection conn, QueryExpression expr, java.lang.Object[] bindValues) Executes a simple query and returns the results.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleQueryExecutor

public SimpleQueryExecutor(Database database)

Creates an instance to execute a simple query.

Parameters:

database - the Database Implementation, used to get the connection

Method Detail

execute

public QueryResults execute(java.sql.Connection conn,
                   QueryExpression expr,
                   java.lang.Object[] bindValues)
                     throws QueryException

Executes a simple query and returns the results. The query must not return any complex objects, because this method can only return simple java objects.

Parameters:

expr - the Query Expression to be executed.

bindValues - the values of the parameters

Returns:

the results of the query.

Throws:

QueryException - if anything goes wrong.