basedaohibernate.java

本文论述了一个前台笔记本销售系统的开发过程

package com.set.appframe.persistence.hibernate;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.set.appframe.persistence.DAO;
import com.set.appframe.persistence.DAOException;

/**
 * This class serves as the Base class for all other DAOs - namely to hold
 * common methods that they might all use.
 * </p>
 * 
 */
public class BaseDAOHibernate extends HibernateDaoSupport implements DAO {
	private Log log = LogFactory.getLog(BaseDAOHibernate.class);

	/**
	 * @see com.set.appframe.persistence.DAO#getObject(java.lang.Object)
	 */
	// public Object getObject(Object o) throws DAOException {
	// Long id = null;
	// // use reflection to get the id and fetch the object
	// try {
	// Method meth = o.getClass().getMethod("getId", new Class[0]);
	// id = (Long) meth.invoke(o, new Object[0]);
	// o = getHibernateTemplate().get(o.getClass(), id);
	// } catch (Exception e) {
	// throw new DAOException("exception loading '"
	// + o.getClass().getName() + "' with id '" + id + "'");
	// }
	// return o;
	// }
	public Object getObject(String id, Class objClass) throws DAOException {
		Object o;
		try {

			o = getHibernateTemplate().get(objClass, id);
		} catch (Exception e) {
			e.printStackTrace();
			throw new DAOException("exception loading '" + objClass.getName()
					+ "' with id '" + id + "'");
		}
		return o;

	}

	/**
	 * @see com.set.appframe.persistence.DAO#saveObject(java.lang.Object)
	 */
	public Object saveObject(Object o) {
		try {
			getHibernateTemplate().saveOrUpdate(o);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return o;
	}

	/**
	 * @see com.set.appframe.persistence.DAO#removeObject(java.lang.Object)
	 */
	public void removeObject(String id, Class objClass) throws DAOException {
		if (log.isDebugEnabled()) {
			log.debug("loading object to delete....");
		}
		Object o;
		o = getObject(id, objClass);
		if (o != null) {
			getHibernateTemplate().delete(o);
		}
	}

	public List getObjectList(String listHQL) throws DAOException {
		return this.getHibernateTemplate().find(listHQL);

	}
}