com.ibm.websphere.objectgrid.em
Class ProjectorFactory

java.lang.Object
  com.ibm.websphere.objectgrid.em.ProjectorFactory

public class ProjectorFactory
extends Object

A factory for creating or retrieving Projector instances.

Example:

 // Get a session and it's EntityManager instance.
 Session s = grid.getSession();
 EntityManager em = s.getEntityManager();

 // Get the Projector that is associated with the EntityManager.
 Projector proj = ProjectorFactory.getProjector(em);

 // Retrieve the EntityMetadata for the "Person" entity type.
 EntityMetadata emdPerson = s.getObjectMap("Person").getEntityMetadata();

 // Find a Person object
 Person p = (Person) em.find(Person.class, "123-45-6789");

 // We can convert any entity to a Tuple.  It can be new, detached or managed.
 Tuple tKey = proj.getTupleFromEntity(p, emdPerson, true);
 Tuple tValue = proj.getTupleFromEntity(p, emdPerson, false);
 

Since:

WAS XD 6.1.0.5

Constructor Summary

ProjectorFactory()

Method Summary

static Projector

getProjector(EntityManager em) Retrieves the Projector associated with the specified EntityManager.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectorFactory

public ProjectorFactory()

Method Detail

getProjector

public static Projector getProjector(EntityManager em)

Retrieves the Projector associated with the specified EntityManager.

Parameters:

em - The instance of the EntityManager to access the Projector.

Returns:

a Projector instance.