/*
* Copyright (C) 2014 GG-Net GmbH - Oliver Günther
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package eu.ggnet.dwoss.redtape.emo;
import javax.persistence.EntityManager;
import eu.ggnet.dwoss.redtape.eao.RedTapeCounterEao;
import eu.ggnet.dwoss.redtape.entity.RedTapeCounter;
import eu.ggnet.dwoss.rules.DocumentType;
/**
* Emo for RedTapeCounter.
*
* @author oliver.guenther
*/
public class RedTapeCounterEmo {
private EntityManager em;
public RedTapeCounterEmo(EntityManager em) {
this.em = em;
}
/**
* Requests a RedTapeCounter and increments the result.
*
* @param type the type of counter.
* @param prefix the prefix of the counter (normally YY)
* @return a RedTapeCounter with incremented Result
*/
public RedTapeCounter requestNext(DocumentType type, String prefix) {
RedTapeCounterEao eao = new RedTapeCounterEao(em);
RedTapeCounter singleResult = eao.findByCompositeKey(type, prefix);
if ( singleResult == null ) {
singleResult = new RedTapeCounter(type, prefix);
em.persist(singleResult);
}
singleResult.setValue(singleResult.getValue() + 1);
return singleResult;
}
}