001/*
002 * Copyright 2002-2019 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.server.handler;
018
019import reactor.core.publisher.Mono;
020
021import org.springframework.util.Assert;
022import org.springframework.web.server.ServerWebExchange;
023import org.springframework.web.server.WebHandler;
024
025/**
026 * {@link WebHandler} that decorates and delegates to another {@code WebHandler}.
027 *
028 * @author Rossen Stoyanchev
029 * @since 5.0
030 */
031public class WebHandlerDecorator implements WebHandler {
032
033        private final WebHandler delegate;
034
035
036        /**
037         * Create a {@code WebHandlerDecorator} for the given delegate.
038         * @param delegate the WebHandler delegate
039         */
040        public WebHandlerDecorator(WebHandler delegate) {
041                Assert.notNull(delegate, "'delegate' must not be null");
042                this.delegate = delegate;
043        }
044
045
046        /**
047         * Return the wrapped delegate.
048         */
049        public WebHandler getDelegate() {
050                return this.delegate;
051        }
052
053
054        @Override
055        public Mono<Void> handle(ServerWebExchange exchange) {
056                return this.delegate.handle(exchange);
057        }
058
059        @Override
060        public String toString() {
061                return getClass().getSimpleName() + " [delegate=" + this.delegate + "]";
062        }
063
064}