EDIT

/**

* Copyright (C) 2009 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/ 

package eu.etaxonomy.cdm.persistence.hibernate;

import org.apache.log4j.Logger;

import org.hibernate.HibernateException;

import org.hibernate.event.SaveOrUpdateEvent;

import org.hibernate.event.SaveOrUpdateEventListener;

import org.joda.time.DateTime;

import org.springframework.security.core.Authentication;

import org.springframework.security.core.context.SecurityContextHolder;

import eu.etaxonomy.cdm.model.common.User;

import eu.etaxonomy.cdm.model.common.VersionableEntity;

public class UpdateEntityListener implements SaveOrUpdateEventListener {

	private static final long serialVersionUID = -3295612929556041686L;

	@SuppressWarnings("unused")

	private static final Logger logger = Logger.getLogger(UpdateEntityListener.class);

	public void onSaveOrUpdate(SaveOrUpdateEvent event)	throws HibernateException {

		Object entity = event.getObject();

		if(entity != null && VersionableEntity.class.isAssignableFrom(entity.getClass())) {

			VersionableEntity versionableEntity = (VersionableEntity)entity;

			versionableEntity.setUpdated(new DateTime());

			Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

			if(authentication != null && authentication.getPrincipal() != null && authentication.getPrincipal() instanceof User) {

			  User user = (User)authentication.getPrincipal();

			  versionableEntity.setUpdatedBy(user);

			} 

		}

	}

}