Java tutorial
/** * $Header: /home/master/nWave-DM-Common/src/com/npower/dm/hibernate/dao/SoftwareRatingEntityDAO.java,v 1.1 2008/01/27 09:50:16 zhao Exp $ * $Revision: 1.1 $ * $Date: 2008/01/27 09:50:16 $ * * =============================================================================================== * License, Version 1.1 * * Copyright (c) 1994-2006 NPower Network Software Ltd. All rights reserved. * * This SOURCE CODE FILE, which has been provided by NPower as part * of a NPower product for use ONLY by licensed users of the product, * includes CONFIDENTIAL and PROPRIETARY information of NPower. * * USE OF THIS SOFTWARE IS GOVERNED BY THE TERMS AND CONDITIONS * OF THE LICENSE STATEMENT AND LIMITED WARRANTY FURNISHED WITH * THE PRODUCT. * * IN PARTICULAR, YOU WILL INDEMNIFY AND HOLD NPower, ITS RELATED * COMPANIES AND ITS SUPPLIERS, HARMLESS FROM AND AGAINST ANY CLAIMS * OR LIABILITIES ARISING OUT OF THE USE, REPRODUCTION, OR DISTRIBUTION * OF YOUR PROGRAMS, INCLUDING ANY CLAIMS OR LIABILITIES ARISING OUT OF * OR RESULTING FROM THE USE, MODIFICATION, OR DISTRIBUTION OF PROGRAMS * OR FILES CREATED FROM, BASED ON, AND/OR DERIVED FROM THIS SOURCE * CODE FILE. * =============================================================================================== */ package com.npower.dm.hibernate.dao; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.hibernate.LockMode; import org.hibernate.Query; import org.hibernate.criterion.Example; import com.npower.dm.core.SoftwareRating; /** * Data access object (DAO) for domain model class SoftwareRatingEntity. * * @see com.npower.dm.hibernate.entity.SoftwareRatingEntity * @author Zhao DongLu * @version $Revision: 1.1 $ $Date: 2008/01/27 09:50:16 $ */ public class SoftwareRatingEntityDAO extends BaseHibernateDAO { private static final Log log = LogFactory.getLog(SoftwareRatingEntityDAO.class); // property constants public static final String RATE = "rate"; public void save(SoftwareRating transientInstance) { log.debug("saving SoftwareRatingEntity instance"); try { getSession().save(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } public void delete(SoftwareRating persistentInstance) { log.debug("deleting SoftwareRatingEntity instance"); try { getSession().delete(persistentInstance); log.debug("delete successful"); } catch (RuntimeException re) { log.error("delete failed", re); throw re; } } public SoftwareRating findById(Long id) { log.debug("getting SoftwareRatingEntity instance with id: " + id); try { SoftwareRating instance = (SoftwareRating) getSession() .get("com.npower.dm.hibernate.entity.SoftwareRatingEntity", id); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } @SuppressWarnings("unchecked") public List<SoftwareRating> findByExample(SoftwareRating instance) { log.debug("finding SoftwareRatingEntity instance by example"); try { List<SoftwareRating> results = getSession() .createCriteria("com.npower.dm.hibernate.entity.SoftwareRatingEntity") .add(Example.create(instance)).list(); log.debug("find by example successful, result size: " + results.size()); return results; } catch (RuntimeException re) { log.error("find by example failed", re); throw re; } } @SuppressWarnings("unchecked") public List<SoftwareRating> findByProperty(String propertyName, Object value) { log.debug("finding SoftwareRatingEntity instance with property: " + propertyName + ", value: " + value); try { String queryString = "from SoftwareRatingEntity as model where model." + propertyName + "= ?"; Query queryObject = getSession().createQuery(queryString); queryObject.setParameter(0, value); return queryObject.list(); } catch (RuntimeException re) { log.error("find by property name failed", re); throw re; } } public List<SoftwareRating> findByRate(Object rate) { return findByProperty(RATE, rate); } @SuppressWarnings("unchecked") public List<SoftwareRating> findAll() { log.debug("finding all SoftwareRatingEntity instances"); try { String queryString = "from SoftwareRatingEntity"; Query queryObject = getSession().createQuery(queryString); return queryObject.list(); } catch (RuntimeException re) { log.error("find all failed", re); throw re; } } public SoftwareRating merge(SoftwareRating detachedInstance) { log.debug("merging SoftwareRatingEntity instance"); try { SoftwareRating result = (SoftwareRating) getSession().merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public void attachDirty(SoftwareRating instance) { log.debug("attaching dirty SoftwareRatingEntity instance"); try { getSession().saveOrUpdate(instance); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public void attachClean(SoftwareRating instance) { log.debug("attaching clean SoftwareRatingEntity instance"); try { getSession().lock(instance, LockMode.NONE); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } }