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/*
* Copyright (c) 1998, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
// 12/14/2017-3.0 Tomas Kraus
// - 291546: Performance degradation due to usage of Vector in DescriptorEventManager
package org.eclipse.persistence.descriptors;
import java.util.EventListener;
import java.util.List;
/**
* 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 particular 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
*/
public interface DescriptorEventListener extends EventListener {
/**
* 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.
*/
// CR#2660080 was missing aboutToDelete
void aboutToDelete(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.
*/
void aboutToInsert(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.
*/
void aboutToUpdate(DescriptorEvent event);
/**
* Implementers should define this method if they need or want to restrict
* the calling of inherited events.
*/
boolean isOverriddenEvent(DescriptorEvent event, List eventManagers);
/**
* 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.
*/
void postBuild(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.
*/
void postClone(DescriptorEvent event);
/**
* This event is raised after an object is deleted from the database.
*/
void postDelete(DescriptorEvent event);
/**
* This event is raised after an object is inserted to the database.
*/
void postInsert(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.
*/
void postMerge(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.
*/
void postRefresh(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.
*/
void postUpdate(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.
*/
void postWrite(DescriptorEvent event);
/**
* This event is raised before an object is deleted from the database.
*/
void preDelete(DescriptorEvent event);
/**
* This event is raised before an object is inserted to the database.
*/
void preInsert(DescriptorEvent event);
/**
* This event is only raised by the EntityManager. It is raised when the
* create operation is initiated on an object.
*/
void prePersist(DescriptorEvent event);
/**
* This event is raised when the remove operation is initiated on an object.
*/
void preRemove(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.
*/
void preUpdate(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.
*/
void preUpdateWithChanges(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.
*/
void preWrite(DescriptorEvent event);
}