| /** |
| * 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.hadoop.crypto.key; |
| |
| import java.io.IOException; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.List; |
| |
| /** |
| * This is a utility class used to extend the functionality of KeyProvider, that |
| * takes a KeyProvider and an Extension. It implements all the required methods |
| * of the KeyProvider by delegating it to the provided KeyProvider. |
| */ |
| public abstract class KeyProviderExtension |
| <E extends KeyProviderExtension.Extension> extends KeyProvider { |
| |
| /** |
| * A marker interface for the KeyProviderExtension subclass implement. |
| */ |
| public static interface Extension { |
| } |
| |
| private KeyProvider keyProvider; |
| private E extension; |
| |
| public KeyProviderExtension(KeyProvider keyProvider, E extensions) { |
| super(keyProvider.getConf()); |
| this.keyProvider = keyProvider; |
| this.extension = extensions; |
| } |
| |
| protected E getExtension() { |
| return extension; |
| } |
| |
| protected KeyProvider getKeyProvider() { |
| return keyProvider; |
| } |
| |
| @Override |
| public boolean isTransient() { |
| return keyProvider.isTransient(); |
| } |
| |
| @Override |
| public Metadata[] getKeysMetadata(String... names) throws IOException { |
| return keyProvider.getKeysMetadata(names); |
| } |
| |
| @Override |
| public KeyVersion getCurrentKey(String name) throws IOException { |
| return keyProvider.getCurrentKey(name); |
| } |
| |
| @Override |
| public KeyVersion createKey(String name, Options options) |
| throws NoSuchAlgorithmException, IOException { |
| return keyProvider.createKey(name, options); |
| } |
| |
| @Override |
| public KeyVersion rollNewVersion(String name) |
| throws NoSuchAlgorithmException, IOException { |
| return keyProvider.rollNewVersion(name); |
| } |
| |
| @Override |
| public KeyVersion getKeyVersion(String versionName) throws IOException { |
| return keyProvider.getKeyVersion(versionName); |
| } |
| |
| @Override |
| public List<String> getKeys() throws IOException { |
| return keyProvider.getKeys(); |
| } |
| |
| @Override |
| public List<KeyVersion> getKeyVersions(String name) throws IOException { |
| return keyProvider.getKeyVersions(name); |
| } |
| |
| @Override |
| public Metadata getMetadata(String name) throws IOException { |
| return keyProvider.getMetadata(name); |
| } |
| |
| @Override |
| public KeyVersion createKey(String name, byte[] material, Options options) |
| throws IOException { |
| return keyProvider.createKey(name, material, options); |
| } |
| |
| @Override |
| public void deleteKey(String name) throws IOException { |
| keyProvider.deleteKey(name); |
| } |
| |
| @Override |
| public KeyVersion rollNewVersion(String name, byte[] material) |
| throws IOException { |
| return keyProvider.rollNewVersion(name, material); |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| keyProvider.flush(); |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + ": " + keyProvider.toString(); |
| } |
| } |