com.wiiyaya.framework.provider.utils.ConsumerUtils.java Source code

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Here is the source code for com.wiiyaya.framework.provider.utils.ConsumerUtils.java

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/*
 * Copyright 2016-2017 the original author or authors.
 *
 * 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 com.wiiyaya.framework.provider.utils;

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.security.core.userdetails.UserDetails;

public class ConsumerUtils {

    @SuppressWarnings("unchecked")
    public static <T extends UserDetails> T getCurrUser() {
        Authentication authentication = getAuthentication();
        if (authentication == null) {
            return null;
        } else {
            return (T) authentication.getPrincipal();
        }
    }

    private static Authentication getAuthentication() {
        SecurityContext context = SecurityContextHolder.getContext();
        if (context == null) {
            return null;
        }
        Authentication authentication = context.getAuthentication();
        if (authentication == null || !authentication.isAuthenticated()
                || authentication instanceof AnonymousAuthenticationToken) {
            return null;
        }
        return authentication;
    }

}