package org.activityinfo.server.database.hibernate.dao;
/*
* #%L
* ActivityInfo Server
* %%
* Copyright (C) 2009 - 2013 UNICEF
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #L%
*/
/**
* Defines common methods of Data Access Objects (DAOs)
*
* @param <T> The entity type (should be annotated with @Entity)
* @param <K> The type of the entity's @Id property
* @author Alex Bertram
*/
public interface DAO<T, K> {
/**
* Persists the entity to the datastore.
* <p/>
* Same as enitityManager.persist(entity)
*
* @param entity
*/
void persist(T entity);
/**
* @param primaryKey
* @return the entity with the specified key or null if no such entity
* exists
*/
T findById(K primaryKey);
}