/*
* 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.spec.emo;
import javax.persistence.EntityManager;
import eu.ggnet.dwoss.rules.ProductGroup;
import eu.ggnet.dwoss.rules.TradeName;
import eu.ggnet.dwoss.spec.eao.ProductFamilyEao;
import eu.ggnet.dwoss.spec.eao.ProductSeriesEao;
import eu.ggnet.dwoss.spec.entity.ProductFamily;
import eu.ggnet.dwoss.spec.entity.ProductSeries;
/**
* Product Series Entity Manipulation Object.
* <p>
* @author oliver.guenther
*/
public class ProductFamilyEmo {
private EntityManager em;
public ProductFamilyEmo(EntityManager em) {
this.em = em;
}
/**
* Requests a Family, never returning null.
* <p>
* @param seriesBrand the brand of the series
* @param seriesGroup the group of the series
* @param seriesName the name of the series
* @param familyName the name of the family
* @return the family, either newly persisted or old existing.
*/
public ProductFamily request(final TradeName seriesBrand, final ProductGroup seriesGroup, final String seriesName, final String familyName) {
ProductFamily family = new ProductFamilyEao(em).find(seriesBrand, seriesGroup, seriesName, familyName);
if ( family == null ) {
ProductSeries series = new ProductSeriesEao(em).find(seriesBrand, seriesGroup, seriesName);
if ( series == null ) {
series = new ProductSeries(seriesBrand, seriesGroup, seriesName);
}
family = new ProductFamily(familyName, series);
em.persist(family);
}
return family;
}
}