com.edgenius.core.dao.hibernate.BaseDAOHibernate.java Source code

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Here is the source code for com.edgenius.core.dao.hibernate.BaseDAOHibernate.java

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/* 
 * =============================================================
 * Copyright (C) 2007-2011 Edgenius (http://www.edgenius.com)
 * =============================================================
 * License Information: http://www.edgenius.com/licensing/edgenius/2.0/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2.0
 * as published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * http://www.gnu.org/licenses/gpl.txt
 *  
 * ****************************************************************
 */
package com.edgenius.core.dao.hibernate;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;

import com.edgenius.core.dao.DAO;
import com.edgenius.core.util.GenericsUtils;

/**
 * 
 * @author Dapeng.Ni
 */
@SuppressWarnings("unchecked")
public class BaseDAOHibernate<T> implements DAO<T> {
    protected final Logger log = LoggerFactory.getLogger(getClass());
    protected Class<T> entityClass;

    @Resource(name = "sessionFactory")
    private SessionFactory sessionFactory;

    public Session getCurrentSesssion() {
        return sessionFactory.getCurrentSession();
    }

    /**
     */
    public BaseDAOHibernate() {
        entityClass = GenericsUtils.getSuperClassGenricType(getClass());
    }

    public T get(Serializable id) {
        return (T) getCurrentSesssion().get(entityClass, id);
    }

    public List<T> getObjects() {

        Criteria criteria = getCurrentSesssion().createCriteria(entityClass);
        criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        return criteria.list();

    }

    public void remove(Serializable id) {
        getCurrentSesssion().delete(get(id));

    }

    public void removeObject(Object obj) {
        getCurrentSesssion().delete(obj);
    }

    public void saveOrUpdate(T o) {
        getCurrentSesssion().saveOrUpdate(o);

    }

    public void refresh(T o) {
        if (o != null)
            getCurrentSesssion().refresh(o);

    }

    public void cleanTable() {
        bulkUpdate("delete from " + entityClass.getName());
    }

    public void merge(T o) {
        if (o != null)
            getCurrentSesssion().merge(o);

    }

    //********************************************************************
    //               Method original from HibernateTemplate
    //********************************************************************
    protected List find(String queryString) throws DataAccessException {
        return find(queryString, (Object[]) null);
    }

    protected List find(String queryString, Object value) throws DataAccessException {
        return find(queryString, new Object[] { value });
    }

    protected List find(final String queryString, final Object... values) throws DataAccessException {
        Query queryObject = getCurrentSesssion().createQuery(queryString);
        if (values != null) {
            for (int i = 0; i < values.length; i++) {
                queryObject.setParameter(i, values[i]);
            }
        }
        return queryObject.list();
    }

    protected int bulkUpdate(String queryString) throws DataAccessException {
        return bulkUpdate(queryString, (Object[]) null);
    }

    protected int bulkUpdate(String queryString, Object value) throws DataAccessException {
        return bulkUpdate(queryString, new Object[] { value });
    }

    protected int bulkUpdate(final String queryString, final Object... values) throws DataAccessException {
        Query queryObject = getCurrentSesssion().createQuery(queryString);
        if (values != null) {
            for (int i = 0; i < values.length; i++) {
                queryObject.setParameter(i, values[i]);
            }
        }
        return queryObject.executeUpdate();
    }

    protected void deleteAll(final Collection entities) throws DataAccessException {
        for (Object entity : entities) {
            getCurrentSesssion().delete(entity);
        }
    }

    protected List findByNamedParam(String queryString, String paramName, Object value) throws DataAccessException {

        return findByNamedParam(queryString, new String[] { paramName }, new Object[] { value });
    }

    protected List findByNamedParam(final String queryString, final String[] paramNames, final Object[] values)
            throws DataAccessException {

        if (paramNames.length != values.length) {
            throw new IllegalArgumentException("Length of paramNames array must match length of values array");
        }
        Query queryObject = getCurrentSesssion().createQuery(queryString);
        if (values != null) {
            for (int i = 0; i < values.length; i++) {
                applyNamedParameterToQuery(queryObject, paramNames[i], values[i]);
            }
        }
        return queryObject.list();
    }

    protected void applyNamedParameterToQuery(Query queryObject, String paramName, Object value)
            throws HibernateException {

        if (value instanceof Collection) {
            queryObject.setParameterList(paramName, (Collection) value);
        } else if (value instanceof Object[]) {
            queryObject.setParameterList(paramName, (Object[]) value);
        } else {
            queryObject.setParameter(paramName, value);
        }
    }
}