org.springframework.messaging.handler.invocation.reactive.HandlerMethodArgumentResolver 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
*
* 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.messaging.handler.invocation.reactive;
import reactor.core.publisher.Mono;
import org.springframework.core.MethodParameter;
import org.springframework.messaging.Message;
/**
* Strategy interface for resolving method parameters into argument values
* in the context of a given {@link Message}.
*
* @author Rossen Stoyanchev
* @since 5.2
*/
public interface HandlerMethodArgumentResolver {
/**
* Whether the given {@linkplain MethodParameter method parameter} is
* supported by this resolver.
* @param parameter the method parameter to check
* @return {@code true} if this resolver supports the supplied parameter;
* {@code false} otherwise
*/
boolean supportsParameter(MethodParameter parameter);
/**
* Resolves a method parameter into an argument value from a given message.
* @param parameter the method parameter to resolve.
* This parameter must have previously been passed to
* {@link #supportsParameter(org.springframework.core.MethodParameter)}
* which must have returned {@code true}.
* @param message the currently processed message
* @return {@code Mono} for the argument value, possibly empty
*/
Mono