ch.flashcard.service.CardService.java Source code

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Here is the source code for ch.flashcard.service.CardService.java

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/*******************************************************************************
 * Copyright (c) 2011-2014 Fernando Petrola
 * 
 *  This file is part of Dragome SDK.
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 ******************************************************************************/
package ch.flashcard.service;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;

import ch.flashcard.domain.Card;
import ch.flashcard.mapper.CardMapper;
import ch.flashcard.persistence.CardDeckEntity;
import ch.flashcard.persistence.CardEntity;
import ch.flashcard.persistence.HibernateUtil;

/**
 * Provides access to the cards in the database.
 * 
 * @author Marc Baur, Adrian Herzog
 */
@SuppressWarnings("unchecked")
public class CardService {

    private final CardMapper cardMapper = new CardMapper();

    public final Card getCardById(final int id) {
        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction transaction = session.beginTransaction();

        CardEntity cardEntity = (CardEntity) session.get(CardEntity.class, id);
        Card card = cardMapper.mapToDomain(cardEntity);

        transaction.commit();
        session.close();

        return card;
    }

    public final List<Card> getAllCards() {
        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction transaction = session.beginTransaction();

        final Query query = session.createQuery("from CardDeck");
        List<CardEntity> cardEntities = query.list();
        List<Card> cards = cardMapper.mapToDomainList(cardEntities);

        transaction.commit();
        session.close();

        return cards;
    }

    public final List<Card> getAllCardsByCardDeck(final int cardDeckId) {
        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction transaction = session.beginTransaction();

        CardDeckEntity cardDeckEntity = (CardDeckEntity) session.get(CardDeckEntity.class, cardDeckId);
        final Criteria criteria = session.createCriteria(CardEntity.class);
        criteria.add(Restrictions.eq("carddeck", cardDeckEntity));
        List<CardEntity> cardEntities = criteria.list();
        List<Card> cards = cardMapper.mapToDomainList(cardEntities);

        transaction.commit();
        session.close();

        return cards;
    }

}