org.juiser.spring.security.user.SecurityContextUser.java Source code

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Here is the source code for org.juiser.spring.security.user.SecurityContextUser.java

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/*
 * Copyright 2017 Les Hazlewood and the respective Juiser contributors
 *
 * 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.juiser.spring.security.user;

import org.juiser.model.ResolvingUser;
import org.juiser.model.User;
import org.juiser.spring.security.core.userdetails.ForwardedUserDetails;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.util.Assert;

/**
 * @since 1.0.0
 */
public class SecurityContextUser extends ResolvingUser {

    protected SecurityContext getSecurityContext() {
        return SecurityContextHolder.getContext();
    }

    protected Authentication getValidAuthentication() {
        SecurityContext ctx = getSecurityContext();
        if (ctx != null) {
            Authentication authc = ctx.getAuthentication();
            if (authc != null && !(authc instanceof AnonymousAuthenticationToken) && authc.isAuthenticated()) {
                return authc;
            }
        }
        return null;
    }

    @Override
    public boolean isAuthenticated() {
        return getValidAuthentication() != null;
    }

    @Override
    protected User findUser() {
        Authentication authc = getValidAuthentication();
        Assert.notNull(authc, "Current SecurityContext Authentication cannot be null.");
        Object value = authc.getPrincipal();
        Assert.isInstanceOf(ForwardedUserDetails.class, value,
                "securityContext.getAuthentication().getPrincipal() must contain a ForwardedUserDetails instance.");
        User user = null;
        if (value instanceof ForwardedUserDetails) {
            ForwardedUserDetails details = (ForwardedUserDetails) value;
            user = details.getUser();
        }
        if (user != null) {
            return user;
        }
        String msg = "Unable to acquire required " + User.class.getName()
                + " instance from the current SecurityContext Authentication.";
        throw new IllegalStateException(msg);
    }
}