com.gramercysoftware.persistence.util.JpaJdbcConnectionJoiner.java Source code

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Here is the source code for com.gramercysoftware.persistence.util.JpaJdbcConnectionJoiner.java

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/*
 * Copyright (C) 2011 David Harcombe
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package com.gramercysoftware.persistence.util;

import java.sql.Connection;
import java.sql.SQLException;

import javax.persistence.EntityManager;

import org.hibernate.Session;
import org.hibernate.ejb.HibernateEntityManager;
import org.hibernate.jdbc.Work;

public class JpaJdbcConnectionJoiner<T> {
    private EntityManager entityManager;
    private T response;
    private Exception exception;

    public JpaJdbcConnectionJoiner(EntityManager entityManager) {
        this.entityManager = entityManager;
    }

    public void doWork(final JdbcWork<T> jdbcWork) {
        exception = null;
        Session session = null;

        if (entityManager instanceof GSPEntityManager) {
            session = ((HibernateEntityManager) ((GSPEntityManager) entityManager).getWrappedEntityManager())
                    .getSession();
        } else {
            session = ((HibernateEntityManager) entityManager).getSession();
        }

        session.doWork(new Work() {
            public void execute(Connection connection) throws SQLException {
                try {
                    response = jdbcWork.execute(connection);
                } catch (SQLException sqlex) {
                    throw sqlex;
                } catch (Exception t) {
                    exception = t;
                }
            }
        });

        if (exception != null) {
            throw new RuntimeException(exception);
        }
    }

    public T getResponse() {
        return response;
    }
}