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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.persistence.hibernate;
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import java.io.Serializable;
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import org.apache.log4j.Logger;
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import org.hibernate.event.AbstractEvent;
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import org.hibernate.event.EventSource;
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import org.hibernate.event.PostDeleteEvent;
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import org.hibernate.event.PostInsertEvent;
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import org.hibernate.event.PostLoadEvent;
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import org.hibernate.event.PostUpdateEvent;
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import org.hibernate.persister.entity.EntityPersister;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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//$Id$
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/**
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* The CrudEvent unifies all CRUD events into one interface.
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* Crud as in Create, Retrieve, Update, Delete. This event will only hold CdmBase objects.
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*
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*
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* @author n.hoffmann
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* @created 24.03.2009
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* @version 1.0
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*/
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public class CdmDataChangeEvent extends AbstractEvent{
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private static final long serialVersionUID = 9113025682352080372L;
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private static final Logger logger = Logger.getLogger(CdmDataChangeEvent.class);
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/**
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* The event types currently implemented
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*
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* @author n.hoffmann
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* @created 25.03.2009
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* @version 1.0
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*/
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public enum EventType {
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INSERT, LOAD, UPDATE, DELETE
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}
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private CdmBase entity;
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private EntityPersister persister;
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private Object[] state;
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// for update only
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private Object[] oldState;
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private Serializable id;
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private EventType eventType;
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/**
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* @param source
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*/
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private CdmDataChangeEvent(
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CdmBase entity,
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Serializable id,
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Object[] state,
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Object[] oldState,
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EntityPersister persister,
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EventSource source,
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EventType eventType
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) {
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super(source);
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this.entity = entity;
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this.id = id;
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this.state = state;
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this.oldState = oldState;
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this.persister = persister;
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this.eventType = eventType;
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}
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public CdmBase getEntity() {
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return entity;
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}
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public Serializable getId() {
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return id;
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}
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public EntityPersister getPersister() {
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return persister;
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}
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public Object[] getState() {
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return state;
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}
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public Object[] getOldState() {
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if(oldState == null){
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oldState = state;
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}
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return oldState;
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}
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public EventType getEventType(){
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return eventType;
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}
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public boolean isInsert(){
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return eventType == EventType.INSERT;
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}
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public boolean isLoad(){
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return eventType == EventType.LOAD;
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}
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public boolean isUpdate(){
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return eventType == EventType.UPDATE;
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}
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public boolean isDelete(){
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return eventType == EventType.DELETE;
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}
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/**
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* @param event
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* @return
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*/
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public static CdmDataChangeEvent NewInstance(AbstractEvent event) {
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CdmDataChangeEvent mediationEvent = null;
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try{
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if(event instanceof PostInsertEvent){
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PostInsertEvent postEvent = (PostInsertEvent) event;
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mediationEvent = new CdmDataChangeEvent(
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(CdmBase)postEvent.getEntity(),
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postEvent.getId(),
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postEvent.getState(),
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null,
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postEvent.getPersister(),
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postEvent.getSession(),
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EventType.INSERT
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);
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}
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if(event instanceof PostLoadEvent){
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PostLoadEvent updateEvent = (PostLoadEvent) event;
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mediationEvent = new CdmDataChangeEvent(
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(CdmBase)updateEvent.getEntity(),
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updateEvent.getId(),
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null,
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null,
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updateEvent.getPersister(),
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updateEvent.getSession(),
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EventType.LOAD
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);
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}
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if(event instanceof PostUpdateEvent){
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PostUpdateEvent updateEvent = (PostUpdateEvent) event;
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mediationEvent = new CdmDataChangeEvent(
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(CdmBase)updateEvent.getEntity(),
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updateEvent.getId(),
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updateEvent.getState(),
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updateEvent.getOldState(),
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updateEvent.getPersister(),
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updateEvent.getSession(),
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EventType.UPDATE
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);
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}
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if(event instanceof PostDeleteEvent){
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PostDeleteEvent deleteEvent = (PostDeleteEvent) event;
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mediationEvent = new CdmDataChangeEvent(
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(CdmBase)deleteEvent.getEntity(),
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deleteEvent.getId(),
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deleteEvent.getDeletedState(),
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null,
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deleteEvent.getPersister(),
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deleteEvent.getSession(),
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EventType.DELETE
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);
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}
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}catch(ClassCastException e){
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// we are only interested in CdmBase entities, we have the try/catch block in case another entity slips through
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logger.warn("tried to instantiate event for non CdmBase entity");
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}
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return mediationEvent;
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}
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}
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