cn.cuizuoli.gotour.resolver.UserInfoMethodArgumentResolver.java Source code

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Here is the source code for cn.cuizuoli.gotour.resolver.UserInfoMethodArgumentResolver.java

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/*
 * Copyright 2014 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 cn.cuizuoli.gotour.resolver;

import org.springframework.core.MethodParameter;
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.User;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

/**
 * UserInfoMethodArgumentResolver
 * @author cuizuoli
 */
public class UserInfoMethodArgumentResolver implements HandlerMethodArgumentResolver {

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        Class<?> paramType = parameter.getParameterType();
        return User.class.isAssignableFrom(paramType);
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
            NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
        Class<?> paramType = parameter.getParameterType();
        if (User.class.isAssignableFrom(paramType)) {
            SecurityContext securityContext = SecurityContextHolder.getContext();
            Authentication authentication = securityContext.getAuthentication();
            if (authentication != null) {
                Object principal = authentication.getPrincipal();
                if (principal instanceof User) {
                    return (User) principal;
                }
            }
        }
        return null;
    }

}