@QueryRedirectors

Use @QueryRedirectors to intercept EclipseLink queries for pre- and post-processing, redirection, or performing some side effect such as auditing.

Annotation Elements

Table 2-56 describes this annotation's elements.

Table 2-56 @QueryRedirectors Annotation Elements

Annotation Element	Description	Default
`allQueries`	This `AllQueries` Query Redirector will be applied to any executing object query that does not have a more precise redirector (like the `ReadObjectQuery` Redirector) or a redirector set directly on the query.	`void.class`
`delete`	A Default `Delete` Object Query Redirector will be applied to any executing `DeleteObjectQuery` or `DeleteAllQuery` that does not have a redirector set directly on the query.	`void.class`
insert	A Default `Insert` Query Redirector will be applied to any executing `InsertObjectQuery` that does not have a redirector set directly on the query.	`void.class`
readAll	A Default `ReadAll` Query Redirector will be applied to any executing `ReadAllQuery` that does not have a redirector set directly on the query. For users executing a JPA Query through the `getResultList()`, API this is the redirector that will be invoked	`void.class`
`readObject`	A Default `ReadObject` Query Redirector will be applied to any executing `ReadObjectQuery` that does not have a redirector set directly on the query. For users executing a JPA Query through the `getSingleResult()` API or `EntityManager.find()`, this is the redirector that will be invoked	`void.class`
`report`	A Default `ReportQuery` Redirector will be applied to any executing `ReportQuery` that does not have a redirector set directly on the query. For users executing a JPA Query that contains aggregate functions or selects multiple entities this is the redirector that will be invoked	`void.class`
`update`	A Default `Update` Query Redirector will be applied to any executing UpdateObjectQuery or `UpdateAllQuery` that does not have a redirector set directly on the query. In EclipseLink an `UpdateObjectQuery` is executed whenever flushing changes to the datasource.	`void.class`

Usage

Use @QueryRedirectors to extend the standard EclipseLink query functionality.

You can set a QueryRedirector through the Query Hint eclipselink.query.redirector or set as a default Redirector on an Entity.

QueryRedirectors are used when integrating EclipseLink Grid to redirect queries to the Coherence grid.

Examples

Example 2-94 shows how to use this annotation.

Example 2-94 Using @QueryRedirectors Annotation

@QueryRedirectors(
    allQueries=org.queryredirectors.AllQueriesForEntity.class)
@Entity
public class
...

See Also

For more information, see:

"Database Queries" in the Understanding EclipseLink