br.com.arsmachina.authentication.dao.hibernate.UserDAOImpl.java Source code

Introduction

Here is the source code for br.com.arsmachina.authentication.dao.hibernate.UserDAOImpl.java

Source

// Copyright 2008 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.arsmachina.authentication.dao.hibernate;

import java.util.List;

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

import br.com.arsmachina.authentication.controller.PasswordEncrypter;
import br.com.arsmachina.authentication.dao.UserDAO;
import br.com.arsmachina.authentication.entity.Role;
import br.com.arsmachina.authentication.entity.User;
import br.com.arsmachina.dao.SortCriterion;
import br.com.arsmachina.dao.hibernate.GenericDAOImpl;

/**
 * {@link UserDAO} implementation using Hibernate
 * 
 * @author Thiago H. de Paula Figueiredo
 */
public class UserDAOImpl extends GenericDAOImpl<User, Integer> implements UserDAO {

    private PasswordEncrypter passwordEncrypter;

    /**
     * Single constructor of this class.
     * 
     * @param sessionFactory a {@link SessionFactory}. It cannot be null.
     * @param passwordEncrypter a {@link PasswordEncrypter}. It cannot be null.
     */
    public UserDAOImpl(SessionFactory sessionFactory, PasswordEncrypter passwordEncrypter) {

        super(sessionFactory);

        if (passwordEncrypter == null) {
            throw new IllegalArgumentException("Parameter passwordEncrypter cannot be null");
        }

    }

    /**
     * Finds the user with a given login and password. The login search is case-insensitive.
     * 
     * @see br.com.arsmachina.authentication.dao.UserDAO#findByLoginAndPassword(java.lang.String,
     * java.lang.String)
     */
    public User findByLoginAndPassword(String login, String password) {

        Session session = getSession();

        Query query = session
                .createQuery("from User where lowercase(login) = :login and " + "password = :password");

        query.setParameter("login", login.toLowerCase());
        query.setParameter("password", passwordEncrypter.encrypt(password));

        return (User) query.uniqueResult();

    }

    /**
     * Finds an user by its login. The search is case-insensitive.
     * 
     * @see br.com.arsmachina.authentication.dao.UserDAO#findByLogin(java.lang.String)
     */
    public User findByLogin(String login) {

        Session session = getSession();

        Query query = session.createQuery("from User where lower(login) = :login");
        query.setParameter("login", login.toLowerCase());

        return (User) query.uniqueResult();

    }

    @SuppressWarnings("unchecked")
    public <T extends Role> List<User> findByRole(Class<T> roleClass) {

        Query query = getSession().createQuery("select distinct(m.user) from Manager m order by m.user.login");

        return query.list();

    }

    /**
     * Returns {@link Constants#ASCENDING_NAME_SORT_CRITERIA}.
     * 
     * @see br.com.arsmachina.dao.hibernate.GenericDAOImpl#getDefaultSortCriteria()
     */
    @Override
    public SortCriterion[] getDefaultSortCriteria() {
        return Constants.ASCENDING_NAME_SORT_CRITERIA;
    }

    public boolean hasUserWithLogin(String login) {

        Query query = getSession().createQuery("select count (distinct u) from User u where lower(login) = :login");
        query.setParameter("login", login.toLowerCase());

        Long result = (Long) query.uniqueResult();

        return result > 0;

    }

}