de.knightsoftnet.validators.server.security.LoggedInChecker.java Source code

Introduction

Here is the source code for de.knightsoftnet.validators.server.security.LoggedInChecker.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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 de.knightsoftnet.validators.server.security;

import de.knightsoftnet.navigation.shared.models.User;
import de.knightsoftnet.validators.server.converter.UserDetailsConverter;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;

/**
 * check if user is logged in. based on the work of https://github.com/imrabti/gwtp-spring-security
 *
 * @author Manfred Tremmel
 */
@Component
public class LoggedInChecker {

    @Autowired
    UserDetailsConverter userDetailsConverter;

    /**
     * get logged in user.
     *
     * @return UserData or null if no one is logged in
     */
    public User getLoggedInUser() {
        User user = null;

        final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication != null) {
            final Object principal = authentication.getPrincipal();

            // principal can be "anonymousUser" (String)
            if (principal instanceof UserDetails) {
                user = this.userDetailsConverter.convert((UserDetails) principal);
            }
        }
        return user;
    }
}