1 package net.sumaris.core.model.referential.taxon;
2
3 /*-
4 * #%L
5 * SUMARiS:: Core
6 * %%
7 * Copyright (C) 2018 - 2019 SUMARiS Consortium
8 * %%
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation, either version 3 of the
12 * License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public
20 * License along with this program. If not, see
21 * <http://www.gnu.org/licenses/gpl-3.0.html>.
22 * #L%
23 */
24
25 import net.sumaris.core.model.referential.IItemReferentialEntity;
26 import org.hibernate.HibernateException;
27 import org.hibernate.engine.spi.SharedSessionContractImplementor;
28 import org.hibernate.id.IdentityGenerator;
29
30 import java.io.Serializable;
31
32 //https://stackoverflow.com/questions/3194721/bypass-generatedvalue-in-hibernate-merge-data-not-in-db
33 public class UseExistingIdOrGenerate extends IdentityGenerator {
34
35 @Override
36 public Serializable generate(SharedSessionContractImplementor session, Object obj) throws HibernateException {
37 if (obj == null) throw new HibernateException(new NullPointerException()) ;
38
39 if ((((IItemReferentialEntity) obj).getId()) == null) {
40 Serializable id = super.generate(session, obj) ;
41 return id;
42 } else {
43 return ((IItemReferentialEntity) obj).getId();
44
45 }
46 }
47 }