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package javax.persistence.spi;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
/**
* Interface implemented by a persistence provider.
* The implementation of this interface that is to
* be used for a given {@link javax.persistence.EntityManager} is specified in
* persistence.xml file in the persistence archive.
* This interface is invoked by the Container when it
* needs to create an {@link javax.persistence.EntityManagerFactory}, or by the
* Persistence class when running outside the Container.
*
* @since Java Persistence 1.0
*/
public interface PersistenceProvider {
/**
* Called by Persistence class when an {@link javax.persistence.EntityManagerFactory}
* is to be created.
*
* @param emName The name of the persistence unit
* @param map A Map of properties for use by the
* persistence provider. These properties may be used to
* override the values of the corresponding elements in
* the persistence.xml file or specify values for
* properties not specified in the persistence.xml.
* @return EntityManagerFactory for the persistence unit,
* or null if the provider is not the right provider
*/
public EntityManagerFactory createEntityManagerFactory(String emName, Map map);
/**
* Called by the container when an {@link javax.persistence.EntityManagerFactory}
* is to be created.
*
* @param info Metadata for use by the persistence provider
* @param map A Map of integration-level properties for use
* by the persistence provider. Can be null if there is no
* integration-level property.
* @return EntityManagerFactory for the persistence unit
* specified by the metadata
*/
public EntityManagerFactory createContainerEntityManagerFactory(PersistenceUnitInfo info, Map map);
}