spring RequestBodyMethodArgumentResolver 源码
spring RequestBodyMethodArgumentResolver 代码
文件路径：/spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestBodyMethodArgumentResolver.java
/*
* Copyright 2002-2019 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 java.util.List;
import reactor.core.publisher.Mono;
import org.springframework.core.MethodParameter;
import org.springframework.core.ReactiveAdapterRegistry;
import org.springframework.http.codec.HttpMessageReader;
import org.springframework.util.Assert;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.reactive.BindingContext;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.ServerWebInputException;
/**
* Resolves method arguments annotated with {@code @RequestBody} by reading the
* body of the request through a compatible {@code HttpMessageReader}.
*
* <p>An {@code @RequestBody} method argument is also validated if it is
* annotated with {@code @jakarta.validation.Valid} or
* {@link org.springframework.validation.annotation.Validated}. Validation
* failure results in an {@link ServerWebInputException}.
*
* @author Sebastien Deleuze
* @author Stephane Maldini
* @author Rossen Stoyanchev
* @since 5.2
*/
public class RequestBodyMethodArgumentResolver extends AbstractMessageReaderArgumentResolver {
public RequestBodyMethodArgumentResolver(List<HttpMessageReader<?>> readers, ReactiveAdapterRegistry registry) {
super(readers, registry);
}
@Override
public boolean supportsParameter(MethodParameter parameter) {
return parameter.hasParameterAnnotation(RequestBody.class);
}
@Override
public Mono<Object> resolveArgument(
MethodParameter param, BindingContext bindingContext, ServerWebExchange exchange) {
RequestBody ann = param.getParameterAnnotation(RequestBody.class);
Assert.state(ann != null, "No RequestBody annotation");
return readBody(param, ann.required(), bindingContext, exchange);
}
}
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