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DescriptorEventListener.java API Doc Glassfish v2 API 7756 Tue May 22 16:54:16 BST 2007 oracle.toplink.essentials.descriptors

DescriptorEventListener

public interface DescriptorEventListener implements EventListener

Purpose: Used to support Java event listener event model on descriptors. Events can be registered for, through two methods, the first is by providing a method to be called on the object that a paticualr operation is being performed on. The second is by registering an event listener object to be notified when any event occurs for that descriptor. The second method is more similar to the java beans event model and requires the registered listener to implement the DescriptorEventListener interface.

see: DescriptorEventAdapter
see: DescriptorEventManager
see: DescriptorEvent

Fields Summary
Constructors Summary
Methods Summary
public void aboutToDelete(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised before an object is deleted from the database. The object's row has already been built and is accessible from the event. This event can be used to amend an object's delete row.
public void aboutToInsert(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised before a new object is inserted to the database. The object's row has already been built and is accessible from the event. This event can be used to amend an object's insert row.
public void aboutToUpdate(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised before an object is updated in the database. This event is only raised for object's that have changes and will be updated. The object's row has already been built and is accessible from the event. This event can be used to amend an object's update row.
public boolean isOverriddenEvent(oracle.toplink.essentials.descriptors.DescriptorEvent event, java.util.Vector eventManagers)
Implementers should define this method if they need or want to restrict the calling of inherited events.
public void postBuild(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is built from its row on a read operation. This event can be used to initialize non-persistent or non-mapped state in the object.
public void postClone(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is cloned into a unit of work. This event can be used to initialize non-mapped state in the object. The event source/object is the unit of work clone, the event originalObject is the original object from the session cache.
public void postDelete(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is deleted from the database.
public void postInsert(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is inserted to the database.
public void postMerge(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is merged from a unit of work into its parent. This event can be used to initialize non-mapped state in the parent object. The event source/object is the parent session object that was merged into, the event originalObject is the unit of work clone that was merged from.
public void postRefresh(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is refreshed from its row on a refresh operation. This event can be used to initialize non-persistent or non-mapped state in the object.
public void postUpdate(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object updated in the database. This event is only raised for objects that had changes and were updated.
public void postWrite(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised after an object is inserted or updated in the database. This event is only raised for new objects or objects that had changes and were updated.
public void preDelete(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised before an object is deleted from the database.
public void preInsert(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised before an object is inserted to the database.
public void prePersist(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is only raised by the EntityManager. It is raised when the create operation is initiated on an object.
public void preRemove(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised when the remove operation is initiated on an object.
public void preUpdate(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised for all existing objects written or committed in a unit of work. This event is raised before the object's changes are computed, so the object may still be modified by the event. If the object has no changes, it will not be updated in a unit of work.
public void preUpdateWithChanges(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised before an object is updated regardless if the object has any database changes. This event was created to support EJB 3.0 events. The object in this case will not have a row accessible from the event. For objects that have database changes, an aboutToUpdate will also be triggered.
public void preWrite(oracle.toplink.essentials.descriptors.DescriptorEvent event)
This event is raised for all new or existing objects written or committed in a unit of work. This event is raised before the object's changes are computed, so the object may still be modified by the event. If the object is existing and has no changes, it will not be updated in a unit of work.