it.scoppelletti.programmerpower.security.DefaultUserManager.java Source code

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Here is the source code for it.scoppelletti.programmerpower.security.DefaultUserManager.java

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/*
 * Copyright (C) 2011 Dario Scoppelletti, <http://www.scoppelletti.it/>.
 * 
 * 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 it.scoppelletti.programmerpower.security;

import java.util.*;
import javax.persistence.*;
import org.apache.commons.codec.digest.*;
import org.springframework.security.authentication.*;
import org.springframework.security.core.*;
import org.springframework.security.core.context.*;
import org.springframework.security.core.userdetails.*;
import org.springframework.transaction.annotation.*;
import it.scoppelletti.programmerpower.*;
import it.scoppelletti.programmerpower.data.*;
import it.scoppelletti.programmerpower.reflect.*;
import it.scoppelletti.programmerpower.types.*;

/**
 * Implementazione di default dell&rsquo;interfaccia {@code UserManager}.
 * 
 * @since 1.0.0
 */
@Final
@Transactional
public class DefaultUserManager implements UserManager, UserDetailsService {

    @PersistenceContext(unitName = DataUtils.PERSISTENCE_UNIT)
    private EntityManager myEntityMgr;

    /**
     * Costruttore.
     */
    public DefaultUserManager() {
    }

    @Transactional(readOnly = true)
    public User loadUser(int userId) {
        return myEntityMgr.find(User.class, userId);
    }

    @Transactional(readOnly = true)
    public User loadLoggedUser() {
        User principal;
        Authentication auth;
        SecurityContext secCtx = SecurityContextHolder.getContext();

        auth = secCtx.getAuthentication();
        if (auth == null || !auth.isAuthenticated() || auth instanceof AnonymousAuthenticationToken) {
            return null;
        }

        principal = (User) auth.getPrincipal();
        return loadUser(principal.getId());
    }

    /**
     * Legge un utente.
     * 
     * @param  userName Codice per l&rsquo;autenticazione dell&rsquo;utente.
     * @return          Utente. Non pu&ograve; essere {@code null}.
     */
    @Transactional(readOnly = true)
    public UserDetails loadUserByUsername(String userName) {
        Query query;

        if (Strings.isNullOrEmpty(userName)) {
            throw new ArgumentNullException("userName");
        }

        query = myEntityMgr.createQuery("from User where code = :code").setParameter("code", userName);

        return (User) query.getSingleResult();
    }

    public void saveUser(User user) {
        if (user == null) {
            throw new ArgumentNullException("user");
        }

        myEntityMgr.persist(user);
    }

    public User updateUser(User user) {
        if (user == null) {
            throw new ArgumentNullException("user");
        }

        return myEntityMgr.merge(user);
    }

    public void deleteUser(User user) {
        if (user == null) {
            throw new ArgumentNullException("user");
        }

        myEntityMgr.remove(user);
    }

    @Transactional(readOnly = true)
    public List<User> listUsers() {
        User user;
        Query query;
        List<User> list;

        list = new ArrayList<User>();
        query = myEntityMgr.createQuery("from User order by code");
        for (Object item : query.getResultList()) {
            user = (User) item;
            list.add(user);
        }

        return list;
    }

    @Transactional(propagation = Propagation.SUPPORTS)
    public String digestPassword(SecureString value) {
        return DigestUtils.sha256Hex(value.getBytes());
    }
}