br.com.machina.verbum.dao.hibernate.PostDAOImpl.java Source code

Introduction

Here is the source code for br.com.machina.verbum.dao.hibernate.PostDAOImpl.java

Source

// Copyright 2010 Thiago H. de Paula Figueiredo
//
// 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 br.com.machina.verbum.dao.hibernate;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;

import br.com.machina.verbum.dao.PostDAO;
import br.com.machina.verbum.entities.Blog;
import br.com.machina.verbum.entities.Post;

/**
 * {@link PostDAOImpl} implementation using Hibernate.
 * 
 * @author Thiago H. de Paula Figueiredo
 */
public class PostDAOImpl implements PostDAO {

    final private Session session;

    /**
     * Single constructor of this class.
     * 
     * @param session a {@link Session}.
     */
    public PostDAOImpl(Session session) {
        this.session = session;
    }

    @SuppressWarnings("unchecked")
    public List<Post> findAll() {

        final Criteria criteria = session.createCriteria(Post.class);
        criteria.add(Restrictions.eq("draft", false));
        criteria.addOrder(Order.desc("date"));

        return criteria.list();

    }

    public void remove(Post post) {
        session.delete(post);
    }

    public void saveOrUpdate(Post post) {
        session.saveOrUpdate(post);
    }

    @SuppressWarnings("unchecked")
    public List<Post> findByBlog(Blog blog) {

        final Criteria criteria = session.createCriteria(Post.class);
        criteria.add(Restrictions.eq("blog", blog));

        return criteria.list();

    }

    public Post findById(int id) {

        final Criteria criteria = session.createCriteria(Post.class);
        criteria.add(Restrictions.eq("id", id));

        return (Post) criteria.list();

    }

    @SuppressWarnings("unchecked")
    public List<Post> findLatest(int maximum) {

        final Criteria criteria = session.createCriteria(Post.class);
        criteria.add(Restrictions.eq("draft", false));
        criteria.addOrder(Order.desc("date"));
        criteria.setMaxResults(maximum);

        return criteria.list();

    }

}