| // Copyright (C) 2018 The Android Open Source Project |
| // |
| // Licensed 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 com.google.gerrit.server.cache; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.google.common.base.Enums; |
| import java.io.IOException; |
| |
| public class EnumCacheSerializer<E extends Enum<E>> implements CacheSerializer<E> { |
| private final Class<E> clazz; |
| |
| public EnumCacheSerializer(Class<E> clazz) { |
| this.clazz = clazz; |
| } |
| |
| @Override |
| public byte[] serialize(E object) throws IOException { |
| return object.name().getBytes(UTF_8); |
| } |
| |
| @Override |
| public E deserialize(byte[] in) throws IOException { |
| String name = new String(in, UTF_8); |
| return Enums.getIfPresent(clazz, name) |
| .toJavaUtil() |
| .orElseThrow(() -> new IOException("Invalid " + clazz.getName() + " value: " + name)); |
| } |
| } |