oracle.toplink.essentials.internal.sequencing.SequencingFactory Maven / Gradle / Ivy
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package oracle.toplink.essentials.internal.sequencing;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl;
import oracle.toplink.essentials.threetier.ClientSession;
/**
* SequencingFactory is private to TopLink.
* It instantiates sequencing classes for sessions.
* It allows sequencing classes to be incupsulated in
* this package.
*
* @see ClientSessionSequencing
* @see RemoteConnectionSequencing
* @see SessionBrokerSequencing
* @see SequencingManager
*
*/
public class SequencingFactory {
/**
* INTERNAL:
* Takes a potential owner - a Session, returns Sequencing object.
* Note that before creating a Sequencing object there is a check performed
* to determine whether the object could be created.
*/
public static Sequencing createSequencing(AbstractSession session) {
Sequencing sequencing = null;
if (session.isClientSession()) {
ClientSession cs = (ClientSession)session;
if (ClientSessionSequencing.sequencingServerExists(cs)) {
sequencing = new ClientSessionSequencing(cs);
}
}
return sequencing;
}
/**
* INTERNAL:
* Takes a potential owner - a DatabaseSession, returns SequencingHome object.
* Only DatabaseSession and ServerSession should be passed (not SessionBroker).
*/
public static SequencingHome createSequencingHome(DatabaseSessionImpl ownerSession) {
SequencingHome home = null;
if (!ownerSession.isBroker()) {
home = new SequencingManager(ownerSession);
}
return home;
}
}