001/* 002 * Copyright 2002-2016 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.web.reactive.result.method; 018 019import reactor.core.publisher.Mono; 020 021import org.springframework.core.MethodParameter; 022import org.springframework.web.reactive.BindingContext; 023import org.springframework.web.server.ServerWebExchange; 024 025/** 026 * Strategy to resolve the argument value for a method parameter in the context 027 * of the current HTTP request. 028 * 029 * @author Rossen Stoyanchev 030 * @since 5.0 031 */ 032public interface HandlerMethodArgumentResolver { 033 034 /** 035 * Whether this resolver supports the given method parameter. 036 * @param parameter the method parameter 037 */ 038 boolean supportsParameter(MethodParameter parameter); 039 040 /** 041 * Resolve the value for the method parameter. 042 * @param parameter the method parameter 043 * @param bindingContext the binding context to use 044 * @param exchange the current exchange 045 * @return {@code Mono} for the argument value, possibly empty 046 */ 047 Mono<Object> resolveArgument( 048 MethodParameter parameter, BindingContext bindingContext, ServerWebExchange exchange); 049 050}