org.jtalks.jcommune.service.nontransactional.SecurityServiceImpl.java Source code

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Here is the source code for org.jtalks.jcommune.service.nontransactional.SecurityServiceImpl.java

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/**
 * Copyright (C) 2011  jtalks.org Team
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * This library 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
 * Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * Also add information on how to contact you by electronic and paper mail.
 * Creation date: Apr 12, 2011 / 8:05:19 PM
 * The jtalks.org Project
 */
package org.jtalks.jcommune.service.nontransactional;

import org.jtalks.jcommune.model.entity.User;
import org.jtalks.jcommune.service.SecurityContextFacade;
import org.jtalks.jcommune.service.SecurityService;
import org.jtalks.jcommune.service.UserService;
import org.springframework.dao.DataAccessException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

/**
 * Abstract layer for Spring Security.
 * Contains methods for authentication and authorization.
 *
 * @author Kirill Afonin
 */
public class SecurityServiceImpl implements SecurityService {

    private UserService userService;
    private SecurityContextFacade securityContextFacade;

    /**
     * {@inheritDoc}
     */
    @Override
    public User getCurrentUser() {
        return userService.getByUsername(getCurrentUserUsername());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getCurrentUserUsername() {
        Authentication auth = securityContextFacade.getContext().getAuthentication();

        if (null == auth) {
            return null;
        }

        Object obj = auth.getPrincipal();
        String username = "";

        if (obj instanceof UserDetails) {
            username = ((UserDetails) obj).getUsername();
        } else {
            username = obj.toString();
        }

        return username;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void authenticateUser(User user) {
        securityContextFacade.getContext().setAuthentication(new UsernamePasswordAuthenticationToken(
                user.getUsername(), user.getPassword(), user.getAuthorities()));
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException, DataAccessException {
        return userService.getByUsername(username);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setUserService(UserService userService) {
        this.userService = userService;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setSecurityContextFacade(SecurityContextFacade securityContextFacade) {
        this.securityContextFacade = securityContextFacade;
    }
}