Hibernate gabrar many to many

[dolfi]

Tengo un problema con la relacion many to many

Si bien me guarda la relacion
antes de guardar va hacia la base y hacer sobre la tabla region pero recorriendo sobre region, y eso es lo que no intiendo. no deberia hacer por la pk completa?
Hibernate: insert into MessageMIT (functionalGroup, priority, service, netElemen
t, product, symptom, place, cause, messageId) values (?, ?, ?, ?, ?, ?, ?, ?, ?)

Hibernate:

Código problema:

select messages0_.region as region0_, messages0_.message as message0_
 from MessagesRegions messages0_ where messages0_.region=?
 

Hibernate: update Message set eventId=?, speech=?, [date]=?, start=?, finish=?,
estimatedTime=?, [user]=?, messageStatus=?, messageScope=?, category=?, channels
=?, incidence=?, incidenceOther=? where id=?
Hibernate: insert into MessagesRegions (region, message) values (?, ?)


tengo el siguiente codigo

Código:

/**
     *  hibernate.set
     *      table="MessagesRegions"
     *      inverse="true"
     *      cascade="save-update"
     *  hibernate.collection-key
     *      column="message"
     *      unique="true"
     *      not-null="true"
     *      
     *  hibernate.collection-many-to-many
     *      column="region"
     *      class="ar.com.tma.eb.olm.server.entity.message.MessageRegion"
     *      readonly="true"
     *	hibernate.collection-cache
     *		usage="nonstrict-read-write" 
	 */
	public Set getRegions() {
		return regions;
	}
	public void setRegions(Set value) {
		regions = value;
	}
	public void addRegion(MessageRegion region) {
		if (region==null) {
			throw new IllegalArgumentException("null MessageRegion");
		}
		 
		region.getMessages().add(this);
		getRegions().add(region);
	}

Código:

public MessageRegion() {
	}
	
    /**
     *  hibernate.set
     *      table="MessagesRegions"
     *      lazy="true"
     *      readonly="true"
     *  hibernate.collection-key
     *      column="region"
     *  hibernate.collection-many-to-many
     *      column="message"
     *      class="ar.com.tma.eb.olm.server.entity.message.MessageMIT"
     */
    public Set getMessages() {
        return messages;
    }
    public void setMessages(Set value) {
        messages = value;
    }

Código:

	Session session = HFactory.currentSession();
			
			MessageMIT message = new MessageMIT();
			message.setDate(new Date());
			message.setUser(user);
			message.setCategory(category);
			message.setFunctionalGroup(functionalGroup);
			message.setMessageStatus(status);
			message.setChannelsAsSet(channels);
			message.setPriority(priority);
			message.setNetElement(netElement);
			message.setProduct(product);
			message.setService(service);
			message.setSymptom(symptom);
			message.setPlace(place);
			message.setStart(start);
			message.setFinish(finish);
			message.setEstimatedTime(estimatedTime);
			message.setCause(cause);			
			message.setIncidence(incidence);
			message.setSpeech(speech);
			message.setIncidenceOther(incidenceOther);
			message.setMessageScope(scopes);
			
			// create message
			session.save(message);
			session.flush();
			
			logger.debug("created message "+message.getId());
			// add regions
			for (Iterator it = regions.iterator(); it.hasNext();) {
				MessageRegion region = (MessageRegion) it.next();
				logger.debug("adding MessageRegion "+region.getId()+" to Message "+message.getId());
				message.addRegion(region);
			}
			// add voice nets
			for (Iterator it = voiceNets.iterator(); it.hasNext();) {
				MessageVoiceNet voiceNet = (MessageVoiceNet) it.next();
				logger.debug("adding MessageVoiceNet "+voiceNet.getId()+" to Message "+message.getId());
				message.addVoiceNet(voiceNet);
			}
			// add data nets
			for (Iterator it = dataNets.iterator(); it.hasNext();) {
				MessageDataNet dataNet = (MessageDataNet) it.next();
				logger.debug("adding MessageDataNet "+dataNet.getId()+" to Message "+message.getId());
				message.addDataNet(dataNet);
			}
			// add incidences
			for (Iterator it = incidences.iterator(); it.hasNext();) {
				MessageIncidence messageIncidence = (MessageIncidence) it.next();
				logger.debug("adding MessageIncidence "+messageIncidence.getId()+" to Message "+message.getId());
				message.addIncidence(messageIncidence);
			}

			// setup eventId
			if (eventId==null) {
				message.setEventId(message.getId());
			}
			else {
				message.setEventId(eventId);
			}
			// update message
			session.update(message);
			session.flush();
			
			
			logger.debug("created/updated message MIT id:"+message.getId()+" eventId:"+message.getEventId());
			displayEventCreation(message);
			return (MessageMIT) message;
		} catch (HibernateException e) {
			logger.error("error creating event MIT");
			e.printStackTrace();
			
			throw new MessageException();
		}

Muchas gracias por alguna ayuda