Java tutorial
/* * Copyright 2014 MIR@MU. * * 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 cz.muni.fi.mir.db.dao.impl; import java.util.Collections; import java.util.List; import javax.persistence.NoResultException; import org.apache.log4j.Logger; import org.springframework.stereotype.Repository; import cz.muni.fi.mir.db.dao.ProgramDAO; import cz.muni.fi.mir.db.domain.Program; import cz.muni.fi.mir.tools.Tools; /** * * @author Dominik Szalai - emptulik at gmail.com */ @Repository(value = "programDAO") public class ProgramDAOImpl extends GenericDAOImpl<Program, Long> implements ProgramDAO { private static final Logger logger = Logger.getLogger(ProgramDAOImpl.class); public ProgramDAOImpl() { super(Program.class); } @Override public List<Program> getProgramByNameAndVersion(String name, String version) { List<Program> resultList = Collections.emptyList(); if (Tools.getInstance().stringIsEmpty(name) && Tools.getInstance().stringIsEmpty(version)) { return getAllPrograms(); } try { resultList = entityManager .createQuery("SELECT p FROM program p WHERE p.name = :name AND p.version = :version", Program.class) .setParameter("name", name).setParameter("version", version).getResultList(); } catch (NoResultException nre) { logger.debug(nre); } return resultList; } @Override public List<Program> getAllPrograms() { List<Program> resultList = Collections.emptyList(); try { resultList = entityManager.createQuery("SELECT p FROM program p", Program.class).getResultList(); } catch (NoResultException nre) { logger.debug(nre); } return resultList; } }