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.messaging.handler.invocation.reactive;
018
019import java.util.ArrayList;
020import java.util.Arrays;
021import java.util.List;
022
023import org.springframework.util.Assert;
024
025/**
026 * Assist with configuration for handler method return value handlers.
027 * At present, it supports only providing a list of custom handlers.
028 *
029 * @author Rossen Stoyanchev
030 * @since 5.2
031 */
032public class ReturnValueHandlerConfigurer {
033
034        private final List<HandlerMethodReturnValueHandler> customHandlers = new ArrayList<>(8);
035
036
037        /**
038         * Configure custom return value handlers for handler methods.
039         * @param handlers the handlers to add
040         */
041        public void addCustomHandler(HandlerMethodReturnValueHandler... handlers) {
042                Assert.notNull(handlers, "'handlers' must not be null");
043                this.customHandlers.addAll(Arrays.asList(handlers));
044        }
045
046
047        public List<HandlerMethodReturnValueHandler> getCustomHandlers() {
048                return this.customHandlers;
049        }
050
051}