| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.jclouds.util; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.ParameterizedType; |
| |
| import com.google.common.base.Optional; |
| |
| /** |
| * |
| * @author Adrian Cole |
| */ |
| public class Optionals2 { |
| |
| public static Class<?> returnTypeOrTypeOfOptional(Method method) { |
| boolean optional = isReturnTypeOptional(method); |
| Class<?> syncClass; |
| if (optional) { |
| ParameterizedType futureType = ParameterizedType.class.cast(method.getGenericReturnType()); |
| // TODO: error checking in case this is a type, not a class. |
| syncClass = Class.class.cast(futureType.getActualTypeArguments()[0]); |
| } else { |
| syncClass = method.getReturnType(); |
| } |
| return syncClass; |
| } |
| |
| public static boolean isReturnTypeOptional(Method method) { |
| boolean optional = method.getReturnType().isAssignableFrom(Optional.class); |
| return optional; |
| } |
| |
| } |