cz.muni.fi.mir.db.dao.impl.ElementDAOImpl.java Source code

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Here is the source code for cz.muni.fi.mir.db.dao.impl.ElementDAOImpl.java

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/* 
 * 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.ElementDAO;
import cz.muni.fi.mir.db.domain.Element;

/**
 * 
 * @author Dominik Szalai - emptulik at gmail.com
 */
@Repository(value = "elementDAO")
public class ElementDAOImpl extends GenericDAOImpl<Element, Long> implements ElementDAO {
    private static final Logger logger = Logger.getLogger(AnnotationDAOImpl.class);

    public ElementDAOImpl() {
        super(Element.class);
    }

    @Override
    public Element getElementByName(String name) {
        Element e = null;
        try {
            e = entityManager
                    .createQuery("SELECT e FROM element e WHERE e.elementName = :elementName", Element.class)
                    .setParameter("elementName", name).getSingleResult();
        } catch (NoResultException nre) {
            logger.debug(nre);
        }

        return e;
    }

    @Override
    public List<Element> getAllElements() {
        List<Element> resultList = Collections.emptyList();

        try {
            resultList = entityManager.createQuery("SELECT e FROM element e", Element.class).getResultList();
        } catch (NoResultException nre) {
            logger.debug(nre);
        }

        return resultList;
    }
}