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package oracle.toplink.essentials.ejb.cmp3;
import oracle.toplink.essentials.sessions.*;
import oracle.toplink.essentials.expressions.Expression;
import oracle.toplink.essentials.threetier.ServerSession;
/**
* <p>
* <b>Purpose</b>: Defines the Interface for TopLink extensions to the EntityManager
* <p>
* @see javax.persistence.EntityManager
*/
/*
* @author Gordon Yorke
*/
public interface EntityManager extends javax.persistence.EntityManager {
/**
* This method returns the current session to the requestor. The current session
* will be a the active UnitOfWork within a transaction and will be a 'scrap'
* UnitOfWork outside of a transaction. The caller is conserned about the results
* then the getSession() or getUnitOfWork() API should be called.
*/
public Session getActiveSession();
/**
* Return the underlying server session
*/
public ServerSession getServerSession();
/**
* This method will return the transactional UnitOfWork during the transaction and null
* outside of the transaction.
*/
public UnitOfWork getUnitOfWork();
/**
* This method will return a Session outside of a transaction and null within a transaction.
*/
public Session getSession();
/**
* This method is used to create a query using a Toplink Expression and the return type.
*/
public javax.persistence.Query createQuery(Expression expression, Class resultType);
}
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