| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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.aws.filters; |
| |
| import org.jclouds.http.HttpRequest; |
| import org.jclouds.reflect.Invocation; |
| import org.jclouds.rest.annotations.ApiVersionOverride; |
| import org.jclouds.rest.internal.GeneratedHttpRequest; |
| |
| import com.google.common.base.Optional; |
| import com.google.common.reflect.Invokable; |
| |
| /** |
| * Utilities for FormSigner implementations. |
| */ |
| public final class FormSignerUtils { |
| |
| private FormSignerUtils() {} |
| |
| /** |
| * Get the version from a @ApiVersionOverride() annotation on an API method or its owning class. |
| * @param request The API request for the method. |
| * @return An optional of the value of the annotation. |
| */ |
| public static Optional<String> getAnnotatedApiVersion(HttpRequest request) { |
| if (request instanceof GeneratedHttpRequest) { |
| GeneratedHttpRequest generatedRequest = (GeneratedHttpRequest) request; |
| return getAnnotatedApiVersion(generatedRequest.getInvocation()); |
| } else { |
| return Optional.absent(); |
| } |
| } |
| |
| private static Optional<String> getAnnotatedApiVersion(Invocation invocation) { |
| final Invokable<?, ?> invokable = invocation.getInvokable(); |
| if (invokable.isAnnotationPresent(ApiVersionOverride.class)) { |
| return Optional.fromNullable(invokable.getAnnotation(ApiVersionOverride.class).value()); |
| } else { |
| final Class<?> owner = invokable.getOwnerType().getRawType(); |
| if (owner.isAnnotationPresent(ApiVersionOverride.class)) { |
| return Optional.fromNullable(owner.getAnnotation(ApiVersionOverride.class).value()); |
| } |
| } |
| return Optional.absent(); |
| } |
| |
| } |