RoleDaoHibernate.java

/**
 * Copyright 2014 David L. Whitehurst
 * 
 * Licensed under the Apache License, Version 2.0 
 * (the "License"); You may not use this file except 
 * in compliance with the License. You may obtain a 
 * copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, 
 * software distributed under the License is distributed on an 
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
 * either express or implied. See the License for the specific 
 * language governing permissions and limitations under the 
 * License.
 * 
 */

package org.musicrecital.dao.hibernate;

import org.musicrecital.dao.RoleDao;
import org.musicrecital.model.Role;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.springframework.stereotype.Repository;


/**
 * This class interacts with hibernate session to save/delete and
 * retrieve Role objects.
 *
 * @author <a href="mailto:bwnoll@gmail.com">Bryan Noll</a>
 * @author jgarcia (updated to hibernate 4)
 * @author <a href="mailto:dlwhitehurst@gmail.com">David L. Whitehurst</a>
 * @version $Id: 8643da65cbb8ccad1149f6f9326cdea3eb04d1b2 $
 */
@Repository
public class RoleDaoHibernate extends GenericDaoHibernate<Role, Long> implements RoleDao {

    /**
     * Constructor to create a Generics-based version using Role as the entity
     */
    public RoleDaoHibernate() {
        super(Role.class);
    }

    /**
     * {@inheritDoc}
     */
    public Role getRoleByName(String rolename) {
        List roles = getSession().createCriteria(Role.class).add(Restrictions.eq("name", rolename)).list();
        if (roles.isEmpty()) {
            return null;
        } else {
            return (Role) roles.get(0);
        }
    }

    /**
     * {@inheritDoc}
     */
    public void removeRole(String rolename) {
        Object role = getRoleByName(rolename);
        Session session = getSessionFactory().getCurrentSession();
        session.delete(role);
    }
}