JPA Modificar conexion Hibernate por codigo (persistense.xml)

Map addedOrOverridenProperties = new HashMap();

// Let's suppose we are using Hibernate as JPA provider
addedOrOverridenProperties.put("hibernate.show_sql", true);
addedOrOverridenProperties.put("hibernate.connection.url", Configuracion.getProperty("Bd_PcsCsv_Str"));
addedOrOverridenProperties.put("hibernate.connection.username", Configuracion.getProperty("Bd_PcsCsv_Usr"));
addedOrOverridenProperties.put("hibernate.connection.password", Configuracion.getProperty("Bd_PcsCsv_Pas"));

Persistence.createEntityManagerFactory([PERSISTENCE_UNIT_NAME], addedOrOverridenProperties);