spring SessionStatusMethodArgumentResolver 源码
spring SessionStatusMethodArgumentResolver 代码
文件路径：/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/SessionStatusMethodArgumentResolver.java
/*
* Copyright 2002-2018 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
*
* https://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.springframework.web.reactive.result.method.annotation;
import org.springframework.core.MethodParameter;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.reactive.BindingContext;
import org.springframework.web.reactive.result.method.SyncHandlerMethodArgumentResolver;
import org.springframework.web.server.ServerWebExchange;
/**
* Resolver for a {@link SessionStatus} argument obtaining it from the
* {@link BindingContext}.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public class SessionStatusMethodArgumentResolver implements SyncHandlerMethodArgumentResolver {
@Override
public boolean supportsParameter(MethodParameter parameter) {
return SessionStatus.class == parameter.getParameterType();
}
@Nullable
@Override
public Object resolveArgumentValue(
MethodParameter parameter, BindingContext bindingContext, ServerWebExchange exchange) {
Assert.isInstanceOf(InitBinderBindingContext.class, bindingContext);
return ((InitBinderBindingContext) bindingContext).getSessionStatus();
}
}
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