org.springframework.web.reactive.function.BodyExtractor Maven / Gradle / Ivy
/*
* 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.function;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import org.springframework.http.ReactiveHttpInputMessage;
import org.springframework.http.codec.HttpMessageReader;
import org.springframework.http.server.reactive.ServerHttpResponse;
/**
* A function that can extract data from a {@link ReactiveHttpInputMessage} body.
*
* @author Arjen Poutsma
* @since 5.0
* @param the type of data to extract
* @param the type of {@link ReactiveHttpInputMessage} this extractor can be applied to
* @see BodyExtractors
*/
@FunctionalInterface
public interface BodyExtractor {
/**
* Extract from the given input message.
* @param inputMessage the request to extract from
* @param context the configuration to use
* @return the extracted data
*/
T extract(M inputMessage, Context context);
/**
* Defines the context used during the extraction.
*/
interface Context {
/**
* Return the {@link HttpMessageReader HttpMessageReaders} to be used for body extraction.
* @return the stream of message readers
*/
List> messageReaders();
/**
* Optionally return the {@link ServerHttpResponse}, if present.
*/
Optional serverResponse();
/**
* Return the map of hints to use to customize body extraction.
*/
Map hints();
}
}