au.org.theark.core.dao.ArkUidGenerator.java Source code

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Here is the source code for au.org.theark.core.dao.ArkUidGenerator.java

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/*******************************************************************************
 * Copyright (c) 2011  University of Western Australia. All rights reserved.
 * 
 * This file is part of The Ark.
 * 
 * The Ark 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.
 * 
 * The Ark 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 au.org.theark.core.dao;

/*** 
 * @author elam
 */

import org.hibernate.Criteria;
import org.hibernate.criterion.Restrictions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Repository;

import au.org.theark.core.model.study.entity.SubjectUidSequence;

@Repository("arkUidGenerator")
public class ArkUidGenerator extends HibernateSessionDao {

    private static Logger log = LoggerFactory.getLogger(ArkUidGenerator.class);

    /**
     * TODO this should use a real fkey
     * @param studyNameKy
     * @return
     */
    public Integer getUidAndIncrement(String studyNameKy) {
        return getUidAndIncrement(studyNameKy, 1);
    }

    /**
     * TODO this should use a real fkey
     * @param studyNameKy
     * @return
     */
    public Integer getUidAndIncrement(String studyNameKy, int numToInsert) {
        Criteria criteria = getSession().createCriteria(SubjectUidSequence.class);
        criteria.add(Restrictions.eq("studyNameId", studyNameKy));
        SubjectUidSequence seqData = (SubjectUidSequence) criteria.uniqueResult();
        if (seqData == null) {
            //log.error("sequence does not exist...creating");
            SubjectUidSequence seq = new SubjectUidSequence(studyNameKy, numToInsert, false);
            getSession().persist(seq);
            getSession().flush();
            return new Integer(0);
        } else {
            int currentSeqNumber = seqData.getUidSequence();
            seqData.setUidSequence((currentSeqNumber + numToInsert));
            getSession().update(seqData);
            getSession().flush();
            return currentSeqNumber;//TODO ...perhaps this should be handled transactionally in one class, and probably with generators...although this isnt really even a key
        }
    }

}