EclipseLink1.0 - 20080707 API Reference

Interface QueryRedirector

All Superinterfaces:
All Known Implementing Classes:

public interface QueryRedirector

Purpose: Query redirection allows for a named or parameterized query (or finder) to dynamically determine how the query is to be executed based on the arguments.

Description: An implementor of this interface can be given to a query to allow the user to have full control over the execution of the query. Redirection can be used to:

Note: If you execute the query on a UnitOfWork, the results register with that UnitOfWork, so any objects you attempt to retrieve with the invoke method must come from the Session Cache.

See Also:
MethodBaseQueryRedirector, DatabaseQuery.setRedirector(org.eclipse.persistence.queries.QueryRedirector)
James Sutherland
TOPLink/Java 3.0

Method Summary
 java.lang.Object invokeQuery(DatabaseQuery query, Record arguments, Session session)
          REQUIRED: Perform the query.

Method Detail


java.lang.Object invokeQuery(DatabaseQuery query,
                             Record arguments,
                             Session session)
REQUIRED: Perform the query. This must execute the query base on the arguments and return a valid result for the query.

EclipseLink1.0 - 20080707 API Reference