/*
* Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
*
* 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 org.jboss.errai.jpa.client.local.backend;
import org.jboss.errai.jpa.client.local.ErraiEntityManager;
/**
* Creates instances of StorageBackend, tying each new instance to a particular
* ErraiEntityManager. This factory class exists to break the reference cycle
* between WebStorageBackend instances (which want a final reference to an
* ErraiEntityManager) and ErraiEntityManager (which wants a final reference to
* its StorageBackend).
*
* @author Jonathan Fuerth <jfuerth@redhat.com>
*/
public interface StorageBackendFactory {
/**
* Creates a new instance of some implementation of StorageBackend which is
* permanently bound to the given ErraiEntityManager.
*
* @param em
* The EntityManager the StorageBackend serves.
* @return a new instance of some implementation of StorageBackend.
*/
StorageBackend createInstanceFor(ErraiEntityManager em);
}