test.googlecode.genericdao.jpa.JPAHibernatePersistenceHelper.java Source code

Introduction

Here is the source code for test.googlecode.genericdao.jpa.JPAHibernatePersistenceHelper.java

Source

/* Copyright 2013 David Wolverton
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package test.googlecode.genericdao.jpa;

import java.io.Serializable;
import java.sql.Connection;
import java.sql.SQLException;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

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

import test.googlecode.genericdao.PersistenceHelper;

public class JPAHibernatePersistenceHelper implements PersistenceHelper {

    public <T> T find(Class<T> type, Serializable id) {
        return (T) entityManager.find(type, id);
    }

    public void persist(Object entity) {
        entityManager.persist(entity);
    }

    public void flush() {
        entityManager.flush();
    }

    public void clear() {
        entityManager.clear();
    }

    private EntityManager entityManager;

    @PersistenceContext
    public void setEnityManager(EntityManager enityManager) {
        this.entityManager = enityManager;
    }

    public <T> T getProxy(Class<T> type, Serializable id) {
        return entityManager.getReference(type, id);
    }

    public void executeWithJdbcConnection(final ExecutableWithJdbcConnection executable) {
        Session hibernateSession = (Session) entityManager.getDelegate();
        hibernateSession.doWork(new Work() {
            public void execute(Connection connection) throws SQLException {
                executable.execute(connection);
            }
        });
    }

}