com.talanlabs.taskmanager.jpa.DefaultJPAAccess Maven / Gradle / Ivy

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package com.talanlabs.taskmanager.jpa;

import com.talanlabs.taskmanager.jpa.model.IBusinessTaskObject;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public class DefaultJPAAccess implements IJPAAccess {

    private final String persistenceUnitName;

    private EntityManagerFactory emf;

    private EntityManager em;

    public DefaultJPAAccess(String persistenceUnitName) {
        super();

        this.persistenceUnitName = persistenceUnitName;

    }

    public void start() {
        emf = Persistence.createEntityManagerFactory(persistenceUnitName);
        em = emf.createEntityManager();
    }

    public void stop() {
        em.close();
        emf.close();
    }

    public final EntityManagerFactory getEntityManagerFactory() {
        return emf;
    }

    @Override
    public final EntityManager getEntityManager() {
        return em;
    }

    @Override
    public  E find(Class businessTaskObject, Long id) {
        return getEntityManager().find(businessTaskObject, id);
    }

    @Override
    public  Class instanceToClass(E businessTask) {
        return (Class) businessTask.getClass();
    }
}