se.vgregion.pubsub.push.repository.jpa.JpaPushSubscriberRepository.java Source code

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Here is the source code for se.vgregion.pubsub.push.repository.jpa.JpaPushSubscriberRepository.java

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/**
 * Copyright 2010 Vstra Gtalandsregionen
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of version 2.1 of the GNU Lesser General Public
 *   License as published by the Free Software Foundation.
 *
 *   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., 59 Temple Place, Suite 330,
 *   Boston, MA 02111-1307  USA
 *
 */

package se.vgregion.pubsub.push.repository.jpa;

import java.net.URI;
import java.util.Collections;
import java.util.List;
import java.util.UUID;

import javax.persistence.NoResultException;

import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import se.vgregion.dao.domain.patterns.repository.db.jpa.AbstractJpaRepository;
import se.vgregion.pubsub.push.PushSubscriber;
import se.vgregion.pubsub.push.impl.DefaultPushSubscriber;
import se.vgregion.pubsub.push.repository.PushSubscriberRepository;

/**
 * Repository for {@link PushSubscriber}s based on JPA
 *
 */
public class JpaPushSubscriberRepository extends AbstractJpaRepository<PushSubscriber, UUID, UUID>
        implements PushSubscriberRepository {

    public JpaPushSubscriberRepository() {
        super(DefaultPushSubscriber.class);
    }

    @Transactional(propagation = Propagation.MANDATORY, readOnly = true)
    public PushSubscriber find(UUID id) {
        try {
            return (PushSubscriber) entityManager
                    .createQuery("select l from DefaultPushSubscriber l " + "where l.id = :id ")
                    .setParameter("id", id).getSingleResult();

        } catch (NoResultException e) {
            return null;
        }
    }

    @Override
    public PushSubscriber findByTopicAndCallback(URI topic, URI callback) {
        try {
            return (PushSubscriber) entityManager
                    .createQuery("select l from DefaultPushSubscriber l " + "where l.topic = :topic "
                            + "and l.callback = :callback ")
                    .setParameter("topic", topic.toString()).setParameter("callback", callback.toString())
                    .getSingleResult();

        } catch (NoResultException e) {
            return null;
        }
    }

    @SuppressWarnings("unchecked")
    @Override
    public List<PushSubscriber> findByTopic(URI topic) {
        try {
            return (List<PushSubscriber>) entityManager
                    .createQuery("select l from DefaultPushSubscriber l " + "where l.topic = :topic ")
                    .setParameter("topic", topic.toString()).getResultList();

        } catch (NoResultException e) {
            return Collections.emptyList();
        }

    }

}