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/*
* 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
*
* 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 org.springframework.web.reactive.result.method.annotation;
import java.lang.annotation.Annotation;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.core.Conventions;
import org.springframework.core.MethodParameter;
import org.springframework.core.ReactiveAdapter;
import org.springframework.core.ReactiveAdapterRegistry;
import org.springframework.core.ResolvableType;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.codec.DecodingException;
import org.springframework.core.codec.Hints;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.codec.HttpMessageReader;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.validation.Validator;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.support.WebExchangeBindException;
import org.springframework.web.bind.support.WebExchangeDataBinder;
import org.springframework.web.reactive.BindingContext;
import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolverSupport;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.ServerWebInputException;
import org.springframework.web.server.UnsupportedMediaTypeStatusException;
/**
* Abstract base class for argument resolvers that resolve method arguments
* by reading the request body with an {@link HttpMessageReader}.
*
*
Applies validation if the method argument is annotated with
* {@code @javax.validation.Valid} or
* {@link org.springframework.validation.annotation.Validated}. Validation
* failure results in an {@link ServerWebInputException}.
*
* @author Rossen Stoyanchev
* @author Sebastien Deleuze
* @since 5.0
*/
public abstract class AbstractMessageReaderArgumentResolver extends HandlerMethodArgumentResolverSupport {
private static final Set SUPPORTED_METHODS =
EnumSet.of(HttpMethod.POST, HttpMethod.PUT, HttpMethod.PATCH);
private final List> messageReaders;
private final List supportedMediaTypes;
/**
* Constructor with {@link HttpMessageReader}'s and a {@link Validator}.
* @param readers readers to convert from the request body
*/
protected AbstractMessageReaderArgumentResolver(List> readers) {
this(readers, ReactiveAdapterRegistry.getSharedInstance());
}
/**
* Constructor that also accepts a {@link ReactiveAdapterRegistry}.
* @param messageReaders readers to convert from the request body
* @param adapterRegistry for adapting to other reactive types from Flux and Mono
*/
protected AbstractMessageReaderArgumentResolver(
List> messageReaders, ReactiveAdapterRegistry adapterRegistry) {
super(adapterRegistry);
Assert.notEmpty(messageReaders, "At least one HttpMessageReader is required");
Assert.notNull(adapterRegistry, "ReactiveAdapterRegistry is required");
this.messageReaders = messageReaders;
this.supportedMediaTypes = messageReaders.stream()
.flatMap(converter -> converter.getReadableMediaTypes().stream())
.collect(Collectors.toList());
}
/**
* Return the configured message converters.
*/
public List> getMessageReaders() {
return this.messageReaders;
}
/**
* Read the body from a method argument with {@link HttpMessageReader}.
* @param bodyParameter the {@link MethodParameter} to read
* @param isBodyRequired true if the body is required
* @param bindingContext the binding context to use
* @param exchange the current exchange
* @return the body
* @see #readBody(MethodParameter, MethodParameter, boolean, BindingContext, ServerWebExchange)
*/
protected Mono
