java-design-patterns/service-layer/src/main/java/com/iluwatar/servicelayer/wizard/WizardDaoImpl.java

/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.servicelayer.wizard;

import com.iluwatar.servicelayer.common.DaoBaseImpl;
import com.iluwatar.servicelayer.spellbook.Spellbook;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;

/**
 * WizardDao implementation.
 */
public class WizardDaoImpl extends DaoBaseImpl<Wizard> implements WizardDao {

  @Override
  public Wizard findByName(String name) {
    Session session = getSessionFactory().openSession();
    Transaction tx = null;
    Wizard result = null;
    try {
      tx = session.beginTransaction();
      Criteria criteria = session.createCriteria(persistentClass);
      criteria.add(Restrictions.eq("name", name));
      result = (Wizard) criteria.uniqueResult();
      for (Spellbook s : result.getSpellbooks()) {
        s.getSpells().size();
      }
      tx.commit();
    } catch (Exception e) {
      if (tx != null) {
        tx.rollback();
      }
      throw e;
    } finally {
      session.close();
    }
    return result;
  }
}