package com.weecode.plugin.comics.model;

import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;

import org.eclipse.persistence.internal.jpa.EntityManagerImpl;
import org.eclipse.persistence.sessions.UnitOfWork;

import com.weecode.plugin.comics.model.emf.ComicsEntityManagerFactory;

/**
 * 
 * @author Jason Kusnier and Tim Hollosy
 *
 */
public class ComicsEditorModel {
	protected EntityManager em;
	protected EntityTransaction transaction;
	

	public ComicsEditorModel() {
		em = ComicsEntityManagerFactory.createEntityManager();
		transaction = em.getTransaction();
		transaction.begin();
	}
	
	public void close() {
		em.close();
	}
	
	public void persistEntity(Object entity)
	{
		em.persist(entity);
	}
	
	public void removeEntity(Object entity)
	{
		em.remove(entity);
	}

	public void save() {
		transaction.commit();
		transaction.begin();
	}

	public boolean isDirty() {
		UnitOfWork uow = ((EntityManagerImpl)em).getUnitOfWork();
		return uow.hasChanges();
	}
}