org.efs.openreports.providers.HibernateProvider.java Source code

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Here is the source code for org.efs.openreports.providers.HibernateProvider.java

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/*
 * Copyright (C) 2006 Erik Swenson - erik@oreports.com
 * 
 * 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; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA.
 *  
 */

package org.efs.openreports.providers;

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

import org.hibernate.HibernateException;
import org.hibernate.JDBCException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.exception.ConstraintViolationException;

import org.apache.log4j.Logger;
import org.efs.openreports.util.ConstraintException;
import org.efs.openreports.util.LocalStrings;
import org.springframework.beans.factory.DisposableBean;

public class HibernateProvider implements DisposableBean {
    protected static Logger log = Logger.getLogger(HibernateProvider.class.getName());

    private static SessionFactory sessionFactory;

    public HibernateProvider() throws ProviderException {
        log.info("SessionFactory Created.");
    }

    public Session openSession() throws ProviderException {
        try {
            return sessionFactory.openSession();
        } catch (HibernateException he) {
            throw new ProviderException(he);
        }
    }

    public void closeSession(Session session) throws ProviderException {
        try {
            if (session != null)
                session.close();
        } catch (HibernateException he) {
            throw new ProviderException(he);
        }
    }

    public void rollbackTransaction(Transaction tx) throws ProviderException {
        try {
            if (tx != null)
                tx.rollback();
        } catch (HibernateException he) {
            throw new ProviderException(he);
        }
    }

    public Object save(Object object) throws ProviderException {
        Session session = openSession();
        Transaction tx = null;

        try {
            tx = session.beginTransaction();
            session.save(object);
            tx.commit();
        } catch (HibernateException he) {
            rollbackTransaction(tx);

            if (he instanceof JDBCException) {
                throw new ProviderException(((JDBCException) he).getSQLException());
            }

            throw new ProviderException(he);
        } finally {
            closeSession(session);
        }

        return object;
    }

    public void update(Object object) throws ProviderException {
        Session session = openSession();
        Transaction tx = null;

        try {
            tx = session.beginTransaction();
            session.update(object);
            tx.commit();
        } catch (HibernateException he) {
            rollbackTransaction(tx);

            if (he instanceof ConstraintViolationException) {
                throw new ProviderException(LocalStrings.ERROR_UNIQUE_CONSTRAINT);
            }

            throw new ProviderException(he);
        } finally {
            closeSession(session);
        }
    }

    public void delete(Object object) throws ProviderException, ConstraintException {
        Session session = openSession();
        Transaction tx = null;

        try {
            tx = session.beginTransaction();
            session.delete(object);
            tx.commit();
        } catch (HibernateException he) {
            rollbackTransaction(tx);

            if (he instanceof ConstraintViolationException) {
                throw new ConstraintException(he.getMessage());
            }

            throw new ProviderException(he);
        } finally {
            closeSession(session);
        }
    }

    public Object load(Class<?> classType, Serializable id) throws ProviderException {
        Session session = openSession();

        try {
            Object object = session.load(classType, id);
            return object;
        } catch (HibernateException he) {
            throw new ProviderException(he);
        } finally {
            closeSession(session);
        }
    }

    public List<?> query(String fromClause) throws ProviderException {
        Session session = openSession();

        try {
            Query query = session.createQuery(fromClause);
            query.setCacheable(true);

            List<?> list = query.list();

            return list;
        } catch (HibernateException he) {
            throw new ProviderException(he);
        } finally {
            closeSession(session);
        }
    }

    public void destroy() {
        try {
            sessionFactory.close();

            log.info("SessionFactory closed.");
        } catch (HibernateException he) {
            log.warn(he.toString());
        }
    }

    public void setSessionFactory(SessionFactory sessionFactory) {
        HibernateProvider.sessionFactory = sessionFactory;
    }
}