001/* 002 * Copyright 2002-2015 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; 018 019import org.springframework.core.MethodParameter; 020import org.springframework.util.concurrent.ListenableFuture; 021 022/** 023 * Support for {@link ListenableFuture} as a return value type. 024 * 025 * @author Sebastien Deleuze 026 * @since 4.2 027 */ 028public class ListenableFutureReturnValueHandler extends AbstractAsyncReturnValueHandler { 029 030 @Override 031 public boolean supportsReturnType(MethodParameter returnType) { 032 return ListenableFuture.class.isAssignableFrom(returnType.getParameterType()); 033 } 034 035 @Override 036 @SuppressWarnings("unchecked") 037 public ListenableFuture<?> toListenableFuture(Object returnValue, MethodParameter returnType) { 038 return (ListenableFuture<?>) returnValue; 039 } 040 041}