spring RequestBodyAdviceAdapter 源码
spring RequestBodyAdviceAdapter 代码
文件路径：/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestBodyAdviceAdapter.java
/*
* Copyright 2002-2021 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.servlet.mvc.method.annotation;
import java.io.IOException;
import java.lang.reflect.Type;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.lang.Nullable;
/**
* A convenient starting point for implementing
* {@link org.springframework.web.servlet.mvc.method.annotation.RequestBodyAdvice
* RequestBodyAdvice} with default method implementations.
*
* <p>Subclasses are required to implement {@link #supports} to return true
* depending on when the advice applies.
*
* @author Rossen Stoyanchev
* @since 4.2
*/
public abstract class RequestBodyAdviceAdapter implements RequestBodyAdvice {
/**
* The default implementation returns the InputMessage that was passed in.
*/
@Override
public HttpInputMessage beforeBodyRead(HttpInputMessage inputMessage, MethodParameter parameter,
Type targetType, Class<? extends HttpMessageConverter<?>> converterType) throws IOException {
return inputMessage;
}
/**
* The default implementation returns the body that was passed in.
*/
@Override
public Object afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter,
Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
return body;
}
/**
* The default implementation returns the body that was passed in.
*/
@Override
@Nullable
public Object handleEmptyBody(@Nullable Object body, HttpInputMessage inputMessage, MethodParameter parameter,
Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {
return body;
}
}
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