Java tutorial
/* *********************************************************************** * VMware ThinApp Factory * Copyright (c) 2009-2013 VMware, Inc. All Rights Reserved. * * 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 com.vmware.thinapp.manualmode.dao; import java.io.Serializable; import java.util.List; import javax.annotation.Resource; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.criterion.Restrictions; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Repository; @Repository public abstract class AbstractDAO<T> { protected final Logger log = LoggerFactory.getLogger(getClass()); @Resource(name = "converterSessionFactory") protected SessionFactory sessionFactory; Class<T> clazz; protected AbstractDAO(Class<T> clazz) { this.clazz = clazz; } public Session getCurrentSession() { return sessionFactory.getCurrentSession(); } public void update(T object) { Session session = getCurrentSession(); session.update(object); } public List<T> findAll() { Session session = getCurrentSession(); @SuppressWarnings("unchecked") List<T> res = session.createCriteria(clazz).list(); return res; } public T findByField(String field, Object value) { Session session = getCurrentSession(); @SuppressWarnings("unchecked") T res = (T) session.createCriteria(clazz).add(Restrictions.eq(field, value)).uniqueResult(); return res; } public List<T> findAllByField(String field, Object value) { Session session = getCurrentSession(); @SuppressWarnings("unchecked") List<T> res = session.createCriteria(clazz).add(Restrictions.eq(field, value)).list(); return res; } public void save(T object) { Session session = getCurrentSession(); session.save(object); } public void saveOrUpdate(T object) { Session session = getCurrentSession(); session.saveOrUpdate(object); } public void delete(T object) { Session session = getCurrentSession(); session.delete(object); } public T get(Serializable id) { Session session = getCurrentSession(); @SuppressWarnings("unchecked") T res = (T) session.get(clazz, id); return res; } public void saveAll(List<T> objects) { Session session = getCurrentSession(); for (T o : objects) { session.save(o); } } public void refresh(T object) { Session session = getCurrentSession(); session.refresh(object); } }