if (partnerEpr == null) throw new UninitializedPartnerEPR();
} else {
partnerEpr = _contexts.eprContext.resolveEndpointReference(partnerEPR);
}
mexDao.setEPR(partnerEpr.toXML().getDocumentElement());
mexDao.setPartnerLink(plinkDAO);
mexDao.setProcess(_dao.getProcess());
mexDao.setInstance(_dao);
mexDao.setPattern((operation.getOutput() != null ? MessageExchangePattern.REQUEST_RESPONSE
: MessageExchangePattern.REQUEST_ONLY));