| // 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.apache.impala.extdatasource; |
| |
| import org.apache.impala.extdatasource.v1.ExternalDataSource; |
| import com.google.common.base.Strings; |
| |
| /** |
| * Enumerates the valid versions of the {@link ExternalDataSource} API. |
| */ |
| public enum ApiVersion { |
| V1(org.apache.impala.extdatasource.v1.ExternalDataSource.class); |
| |
| private final Class<?> apiInterface_; |
| |
| ApiVersion(Class<?> interfaceClass) { |
| apiInterface_ = interfaceClass; |
| } |
| |
| /** |
| * Gets the {@link Class} for the interface this API version represents. |
| */ |
| public Class<?> getApiInterface() { return apiInterface_; } |
| |
| /** |
| * Parses the API version from the string. Is case-insensitive. |
| * @return The value of the ApiVersion enum represented by the string or null |
| * if the string is not a valid ApiVersion. |
| */ |
| public static ApiVersion parseApiVersion(String apiVersionString) { |
| if (Strings.isNullOrEmpty(apiVersionString)) return null; |
| try { |
| return valueOf(apiVersionString.toUpperCase()); |
| } catch (IllegalArgumentException ex) { |
| return null; |
| } |
| } |
| } |