Java tutorial
/** * Copyright 2013 Paul Illingworth * * 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 uk.co.threeonefour.ifictionary.svc; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.List; import org.springframework.transaction.annotation.Transactional; import uk.co.threeonefour.ifictionary.api.game.GameInfo; import uk.co.threeonefour.ifictionary.svc.dao.GameFileDao; import uk.co.threeonefour.ifictionary.svc.dao.GameInfoDao; public class GameServiceImpl implements GameService { private final GameInfoDao gameInfoDao; private final GameFileDao gameFileDao; public GameServiceImpl(GameInfoDao gameInfoDao, GameFileDao gameFileDao) { this.gameInfoDao = gameInfoDao; this.gameFileDao = gameFileDao; } @Transactional public List<GameInfo> listGames() { List<GameInfo> games = gameInfoDao.list(0, Integer.MAX_VALUE); return games; } @Transactional public List<GameInfo> listFeaturedGames() { List<GameInfo> games = gameInfoDao.list(0, Integer.MAX_VALUE); return games; } @Override public GameInfo getGame(Long gameId) { return gameInfoDao.get(gameId); } @Override public InputStream getFile(Long gameId) throws IOException { GameInfo gameInfo = gameInfoDao.get(gameId); if (gameInfo != null) { return gameFileDao.read(gameInfo.getFileId()); } throw new FileNotFoundException("" + gameId); } }