package net.sourceforge.seqware.common.hibernate;

import net.sourceforge.seqware.common.factory.BeanFactory;
import org.hibernate.FlushMode;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.SessionFactoryUtils;
import org.springframework.orm.hibernate3.SessionHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;

/**
 * <p>
 * Abstract InSessionExecutions class.
 * </p>
 * 
 * @author boconnor
 * @version $Id: $Id
 */
public abstract class InSessionExecutions {

    private static Session session;
    private static SessionFactory sessionFactory;
    private static FlushMode oldMode;

    /**
     * <p>
     * runInSessionCalculations.
     * </p>
     */
    protected void runInSessionCalculations() {
        bindSessionToThread();
        hibernateCalls();
        unBindSessionFromTheThread();
    }

    /**
     * <p>
     * hibernateCalls.
     * </p>
     */
    protected abstract void hibernateCalls();

    /**
     * <p>
     * bindSessionToThread.
     * </p>
     */
    public static void bindSessionToThread() {
        sessionFactory = BeanFactory.getSessionFactoryBean();
        session = SessionFactoryUtils.getSession(sessionFactory, true);
        oldMode = session.getFlushMode();
        TransactionSynchronizationManager.bindResource(sessionFactory, new SessionHolder(session));
    }

    /**
     * <p>
     * bindSessionToThread.
     * </p>
     * 
     * @param mode
     *            a {@link org.hibernate.FlushMode} object.
     */
    public static void bindSessionToThread(FlushMode mode) {
        bindSessionToThread();
        session.setFlushMode(mode);
    }

    /**
     * <p>
     * unBindSessionFromTheThread.
     * </p>
     */
    public static void unBindSessionFromTheThread() {
        // session.flush();
        // session.setFlushMode(oldMode);
        TransactionSynchronizationManager.unbindResource(sessionFactory);
        SessionFactoryUtils.releaseSession(session, sessionFactory);
    }

    /**
     * <p>
     * evict.
     * </p>
     * 
     * @param o
     *            a {@link java.lang.Object} object.
     */
    public static void evict(Object o) {
        session.evict(o);
    }

}