/**
* Copyright (C) 2011 JTalks.org Team
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jtalks.jcommune.service;
import org.jtalks.common.model.entity.Entity;
import org.jtalks.jcommune.plugin.api.exceptions.NotFoundException;
/**
* This is generic interface for services which would interact with database entities via DAO object.
* This interface include all base method declaration which straightly based on database CRUD operations.
*
* @author Osadchuck Eugeny
* @author Kirill Afonin
*/
public interface EntityService<T extends Entity> {
/**
* Get persistent object by id. Method is trying to find persistent object with current primary id and return it.
*
* @param id primary id of persistent object to find, id could not be negative.
* If negative id value will be put IllegalAgrumentEception will be thrown.
* @return persistent object T or null if row with primary id = id is absent.
* @throws org.jtalks.jcommune.plugin.api.exceptions.NotFoundException
* when entity not found
*/
T get(Long id) throws NotFoundException;
}