Java tutorial
/** * 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.server.core.config; import java.util.List; import javax.persistence.EntityManager; import org.hibernate.Criteria; import org.hibernate.criterion.Criterion; import org.hibernate.criterion.MatchMode; import org.hibernate.criterion.Order; import org.hibernate.criterion.Restrictions; import org.springframework.stereotype.Repository; import com.abiquo.server.core.common.persistence.DefaultDAOBase; @Repository("jpaSystemPropertyDAO") public class SystemPropertyDAO extends DefaultDAOBase<Integer, SystemProperty> { public SystemPropertyDAO() { super(SystemProperty.class); } public SystemPropertyDAO(EntityManager entityManager) { super(SystemProperty.class, entityManager); } public boolean existsAnyWithName(String name) { return existsAnyByCriterions(equalsName(name)); } public boolean existsAnyOtherWithName(SystemProperty systemProperty, String name) { return this.existsAnyOtherByCriterions(systemProperty, equalsName(name)); } public SystemProperty findByName(String name) { Criteria criteria = createCriteria(equalsName(name)); criteria.addOrder(Order.asc(SystemProperty.NAME_PROPERTY)); List<SystemProperty> result = getResultList(criteria); return result.isEmpty() ? null : result.get(0); } public List<SystemProperty> findByComponent(String component) { Criteria criteria = createCriteria(equalsComponent(component)); criteria.addOrder(Order.asc(SystemProperty.NAME_PROPERTY)); return getResultList(criteria); } private Criterion equalsName(String name) { return Restrictions.eq(SystemProperty.NAME_PROPERTY, name); } private Criterion equalsComponent(String component) { String prefix = component + "."; return Restrictions.like(SystemProperty.NAME_PROPERTY, prefix, MatchMode.START); } }