001/*
002 * Copyright 2002-2018 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;
018
019import reactor.core.publisher.Mono;
020
021import org.springframework.web.reactive.DispatcherHandler;
022import org.springframework.web.reactive.HandlerAdapter;
023import org.springframework.web.reactive.HandlerResult;
024import org.springframework.web.server.ServerWebExchange;
025import org.springframework.web.server.WebHandler;
026
027/**
028 * {@link HandlerAdapter} that allows using the plain {@link WebHandler} contract
029 * with the generic {@link DispatcherHandler}.
030 *
031 * @author Rossen Stoyanchev
032 * @author Sebastien Deleuze
033 * @since 5.0
034 */
035public class SimpleHandlerAdapter implements HandlerAdapter {
036
037        @Override
038        public boolean supports(Object handler) {
039                return WebHandler.class.isAssignableFrom(handler.getClass());
040        }
041
042        @Override
043        public Mono<HandlerResult> handle(ServerWebExchange exchange, Object handler) {
044                WebHandler webHandler = (WebHandler) handler;
045                Mono<Void> mono = webHandler.handle(exchange);
046                return mono.then(Mono.empty());
047        }
048
049}