csns.model.forum.dao.jpa.ForumDaoImpl.java Source code

Introduction

Here is the source code for csns.model.forum.dao.jpa.ForumDaoImpl.java

Source

/*
 * This file is part of the CSNetwork Services (CSNS) project.
 * 
 * Copyright 2012-2014, Chengyu Sun (csun@calstatela.edu).
 * 
 * CSNS is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 * 
 * CSNS 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 Affero General Public License for
 * more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with CSNS. If not, see http://www.gnu.org/licenses/agpl.html.
 */
package csns.model.forum.dao.jpa;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import org.springframework.security.access.prepost.PostAuthorize;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import csns.model.academics.Course;
import csns.model.academics.Department;
import csns.model.forum.Forum;
import csns.model.forum.dao.ForumDao;

@Repository
public class ForumDaoImpl implements ForumDao {

    @PersistenceContext
    private EntityManager entityManager;

    @Override
    @PostAuthorize("not returnObject.membersOnly or authenticated and returnObject.isMember(principal)")
    public Forum getForum(Long id) {
        return entityManager.find(Forum.class, id);
    }

    @Override
    public Forum getForum(String name) {
        return entityManager.createQuery("from Forum where name = :name", Forum.class).setParameter("name", name)
                .getSingleResult();
    }

    @Override
    public Forum getForum(Course course) {
        return entityManager.createQuery("from Forum where course = :course", Forum.class)
                .setParameter("course", course).getSingleResult();
    }

    @Override
    public List<Forum> getSystemForums() {
        String query = "from Forum where department is null and course is null " + "and hidden = false";

        return entityManager.createQuery(query, Forum.class).getResultList();
    }

    @Override
    public List<Forum> getCourseForums(Department department) {
        String query = "from Forum where course.department = :department "
                + "and course.obsolete = false order by course.code asc";

        return entityManager.createQuery(query, Forum.class).setParameter("department", department).getResultList();
    }

    @Override
    public List<Forum> searchForums(String term, int maxResults) {
        TypedQuery<Forum> query = entityManager.createNamedQuery("forum.search", Forum.class);
        if (maxResults > 0)
            query.setMaxResults(maxResults);
        return query.setParameter("term", term).getResultList();
    }

    @Override
    @Transactional
    public Forum saveForum(Forum forum) {
        return entityManager.merge(forum);
    }

}