org.meruvian.yama.service.DefaultSessionCredential.java Source code

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Here is the source code for org.meruvian.yama.service.DefaultSessionCredential.java

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/**
 * Copyright 2014 Meruvian
 *
 * 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 org.meruvian.yama.service;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.inject.Inject;

import org.meruvian.yama.service.security.DefaultUserDetails;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.stereotype.Service;

/**
 * @author Dian Aditya
 *
 */
@Service
public class DefaultSessionCredential implements SessionCredential {
    private UserManager userService;
    private UserDetailsService userDetailsService;

    @Inject
    public DefaultSessionCredential(UserManager userService) {
        this.userService = userService;
    }

    @Inject
    public void setUserDetailsService(UserDetailsService userDetailsService) {
        this.userDetailsService = userDetailsService;
    }

    @Override
    public org.meruvian.yama.repository.user.User getCurrentUser() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication == null || !authentication.isAuthenticated()) {
            return null;
        }

        if (authentication.getPrincipal() instanceof DefaultUserDetails) {
            DefaultUserDetails user = (DefaultUserDetails) authentication.getPrincipal();
            return user.getUser();
        }

        return null;
    }

    @Override
    public String getCurrentUsername() {
        org.meruvian.yama.repository.user.User user = getCurrentUser();

        if (user != null) {
            return user.getUsername();
        }

        return null;
    }

    @Override
    public void registerAuthentication(String userId) {
        org.meruvian.yama.repository.user.User user = userService.getUserById(userId);
        UserDetails userDetails = userDetailsService.loadUserByUsername(user.getUsername());

        Authentication auth = new UsernamePasswordAuthenticationToken(userDetails, null,
                userDetails.getAuthorities());
        SecurityContextHolder.getContext().setAuthentication(auth);
    }

    @Override
    public List<String> getCurrentRoles() {
        List<String> roles = new ArrayList<String>();
        Collection<? extends GrantedAuthority> authorities = SecurityContextHolder.getContext().getAuthentication()
                .getAuthorities();
        for (GrantedAuthority authority : authorities) {
            roles.add(authority.getAuthority());
        }

        return roles;
    }
}