DAOAbstractSpring.java

/*
 * $Header: it.geosolutions.geobatch.ftp.server.dao.hibernate.DAOGenericHibernate,v. 0.1 13/ott/2009 09.59.29 created by giuseppe $
 * $Revision: 0.1 $
 * $Date: 13/ott/2009 09.59.29 $
 *
 * ====================================================================
 *
 * Copyright (C) 2007-2008 GeoSolutions S.A.S.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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. 
 *
 * ====================================================================
 *
 * This software consists of voluntary contributions made by developers
 * of GeoSolutions.  For more information on GeoSolutions, please see
 * <http://www.geo-solutions.it/>.
 *
 */
package it.geosolutions.geobatch.ftpserver.dao.hibernate;

import it.geosolutions.geobatch.ftpserver.dao.GenericDAO;
import it.geosolutions.geobatch.users.dao.DAOException;

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

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.criterion.Criterion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

/**
 * @author giuseppe
 * 
 */
public abstract class DAOAbstractSpring<T, ID extends Serializable> extends HibernateDaoSupport
        implements GenericDAO<T, ID> {

    private static final Logger LOGGER = LoggerFactory.getLogger(DAOAbstractSpring.class);

    private Class<T> persistentClass;

    public DAOAbstractSpring(Class<T> persistentClass) {
        if (LOGGER.isTraceEnabled())
            LOGGER.trace("Persistent Class : {0}", persistentClass);
        this.persistentClass = persistentClass;
    }

    protected Class<T> getPersistentClass() {
        if (LOGGER.isTraceEnabled())
            LOGGER.trace("Persistent class: {0}", persistentClass.getName());
        return persistentClass;
    }

    public List<T> findAll() throws DAOException {
        return findByCriteria();
    }

    public List<T> findAll(int offset, int limite) throws DAOException {
        return findByCriteria(offset, limite);
    }

    @SuppressWarnings("unchecked")
    public List<T> findByCriteria(Criterion... criterion) throws DAOException {
        try {
            Criteria crit = getSession().createCriteria(getPersistentClass());
            for (Criterion c : criterion) {
                crit.add(c);
            }
            return crit.list();
        } catch (HibernateException ex) {
            LOGGER.trace(ex.getMessage());
            throw new DAOException(ex);
        }
    }

    @SuppressWarnings("unchecked")
    public List<T> findByCriteria(int offset, int limite, Criterion... criterion)
            throws DAOException {
        try {
            Criteria crit = getSession().createCriteria(getPersistentClass());
            for (Criterion c : criterion) {
                crit.add(c);
            }
            crit.setFirstResult(offset);
            crit.setMaxResults(limite);
            return crit.list();
        } catch (HibernateException ex) {
            LOGGER.trace(ex.getMessage());
            throw new DAOException(ex);
        }
    }

    @SuppressWarnings("unchecked")
    public T findById(ID id, boolean lock) throws DAOException {
        T entity;
        try {
            if (lock) {
                entity = (T) getSession().load(getPersistentClass(), id, LockMode.UPGRADE);
            } else {
                entity = (T) getSession().load(getPersistentClass(), id);
            }
        } catch (HibernateException ex) {
            LOGGER.trace(ex.getMessage());
            throw new DAOException(ex);
        }
        return entity;

    }

    public void lock(T entity) throws DAOException {
        try {
            getSession().lock(entity, LockMode.UPGRADE);
        } catch (HibernateException ex) {
            LOGGER.trace(ex.getMessage());
            throw new DAOException(ex);
        }
    }

    public T makePersistent(T entity) throws DAOException {
        try {
            getSession().saveOrUpdate(entity);
        } catch (HibernateException ex) {
            LOGGER.info(ex.getMessage());
            throw new DAOException(ex);
        }
        return entity;
    }

    public void makeTransient(T entity) throws DAOException {
        try {
            getSession().delete(entity);
        } catch (HibernateException ex) {
            LOGGER.trace(ex.getMessage());
            throw new DAOException(ex);
        }
    }

}