/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.ambari.view.hive20.persistence;
import org.apache.ambari.view.hive20.persistence.utils.FilteringStrategy;
import org.apache.ambari.view.hive20.persistence.utils.Indexed;
import org.apache.ambari.view.hive20.persistence.utils.ItemNotFound;
import java.util.List;
/**
* Object storage interface
*/
public interface Storage {
/**
* Persist object to DB. It should be Indexed
* @param obj object to save
*/
<T extends Indexed> void store(Class<T> model, Indexed obj);
/**
* Load object
* @param model bean class
* @param id identifier
* @return bean instance
* @throws ItemNotFound thrown if item with id was not found in DB
*/
<T extends Indexed> T load(Class<T> model, Object id) throws ItemNotFound;
/**
* Load all objects of given bean class
* @param model bean class
* @param filter filtering strategy (return only those objects that conform condition)
* @param <T> bean class
* @return list of filtered objects
*/
<T extends Indexed> List<T> loadAll(Class<? extends T> model, FilteringStrategy filter);
/**
* Load all objects of given bean class
* @param model bean class
* @param <T> bean class
* @return list of all objects
*/
<T extends Indexed> List<T> loadAll(Class<T> model);
/**
* Delete object
* @param model bean class
* @param id identifier
*/
void delete(Class model, Object id) throws ItemNotFound;
/**
* Check is object exists
* @param model bean class
* @param id identifier
* @return true if exists
*/
boolean exists(Class model, Object id);
}