BookDAOImpl.java

//
// Copyright 2009 Robin Komiwes, Bruno Verachten, Christophe Cordenier
//
// 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 com.wooki.domain.dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;

import com.wooki.domain.model.Book;

public class BookDAOImpl extends WookiGenericDAOImpl<Book, Long> implements BookDAO
{

    public BookDAOImpl(Session session)
    {
        super(session);
    }

    public Book findBookBySlugTitle(String title)
    {
        Query query = this.session.createQuery("select b from " + getEntityType()
                + " b where b.slugTitle=:st and b.deletionDate is null");
        List<Book> results = query.setParameter("st", title).list();
        if (results != null && results.size() > 0) { return results.get(0); }
        return null;
    }

    public List<Book> listByOwner(Long id)
    {
        assert id != null;
        Query query = session.createQuery("select b from " + getEntityType()
                + " b where b.owner.id=:uid and b.deletionDate is null");
        query.setParameter("uid", id);
        return (List<Book>) query.list();
    }

    public List<Book> listByCollaborator(Long id)
    {
        assert id != null;
        Query query = session
                .createQuery("select b from "
                        + getEntityType()
                        + " b join b.users as u where b.owner.id!=:uid and u.id=:uid and b.deletionDate is null");
        query.setParameter("uid", id);
        return (List<Book>) query.list();
    }

    public List<Book> listByTitle(String title)
    {
        Query query = this.session.createQuery("from " + getEntityType()
                + " b where lower(b.title) like :title escape '!' and b.deletionDate is null");
        query.setParameter("title", new String(title).toLowerCase());
        return (List<Book>) query.list();
    }

    public boolean isAuthor(Long bookId, String username)
    {
        assert bookId != null;

        Query query = this.session
                .createQuery("select count(b) from Book b join b.users as u where u.username=:un and b.id=:id");
        Long result = (Long) query.setParameter("un", username).setParameter("id", bookId)
                .uniqueResult();
        return result == 1;
    }

    public boolean isOwner(Long bookId, String username)
    {
        assert bookId != null;
        Query query = this.session
                .createQuery("select count(b) from Book b where b.id=:id and b.owner.username=:un");
        Long result = (Long) query.setParameter("un", username).setParameter("id", bookId)
                .uniqueResult();
        return result == 1;
    }
}