/**
* Abiquo community edition
* cloud management application for hybrid clouds
* Copyright (C) 2008-2010 - Abiquo Holdings S.L.
*
* This application is free software; you can redistribute it and/or
* modify it under the terms of the GNU LESSER GENERAL PUBLIC
* LICENSE as published by the Free Software Foundation under
* version 3 of the License
*
* This software 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
* LESSER GENERAL PUBLIC LICENSE v.3 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
package com.abiquo.abiserver.persistence;
import java.io.Serializable;
import java.util.List;
import org.apache.cxf.common.util.StringUtils;
import org.hibernate.Query;
import org.hibernate.Session;
public class SessionUtils
{
public static void saveAndFlush(Session session, Object... entities)
{
assert session != null;
assert entities != null;
for (Object entity : entities)
{
assert entity != null;
session.save(entity);
}
session.flush();
}
@SuppressWarnings("unchecked")
public static <T> T uniqueResult(Session session, Class<T> cls, String queryString,
Object... params)
{
assert cls != null;
return (T) uniqueResult(session, queryString, params);
}
public static Object uniqueResult(Session session, String queryString, Object... params)
{
assert session != null;
assert !StringUtils.isEmpty(queryString);
assert params != null;
Query query = createQueryWithParameters(session, queryString, params);
return query.uniqueResult();
}
public static List< ? > list(Session session, String queryString, Object... params)
{
assert session != null;
assert !StringUtils.isEmpty(queryString);
assert params != null;
Query query = createQueryWithParameters(session, queryString, params);
return query.list();
}
@SuppressWarnings("unchecked")
public static <T> List<T> list(Session session, Class<T> cls, String queryString,
Object... params)
{
assert cls != null;
return (List<T>) list(session, queryString, params);
}
private static Query createQueryWithParameters(Session session, String queryString,
Object... params)
{
Query query = session.createQuery(queryString);
for (int i = 0; i < params.length; i++)
{
Object param = params[i];
assert param != null;
query.setParameter(i, param);
}
return query;
}
public static <T> boolean entityExists(Session session, Class<T> cls, Serializable id)
{
assert session != null;
assert cls != null;
assert id != null;
return session.get(cls, id) != null;
}
}