| // 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.serialize; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.CharacterCodingException; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CodingErrorAction; |
| |
| public enum StringCacheSerializer implements CacheSerializer<String> { |
| INSTANCE; |
| |
| @Override |
| public byte[] serialize(String object) { |
| return serialize(UTF_8, object); |
| } |
| |
| @VisibleForTesting |
| static byte[] serialize(Charset charset, String s) { |
| if (s.isEmpty()) { |
| return new byte[0]; |
| } |
| try { |
| ByteBuffer buf = |
| charset |
| .newEncoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT) |
| .encode(CharBuffer.wrap(s)); |
| byte[] result = new byte[buf.remaining()]; |
| buf.get(result); |
| return result; |
| } catch (CharacterCodingException e) { |
| throw new IllegalStateException("Failed to serialize string", e); |
| } |
| } |
| |
| @Override |
| public String deserialize(byte[] in) { |
| if (in.length == 0) { |
| return ""; |
| } |
| try { |
| return UTF_8 |
| .newDecoder() |
| .onMalformedInput(CodingErrorAction.REPORT) |
| .onUnmappableCharacter(CodingErrorAction.REPORT) |
| .decode(ByteBuffer.wrap(in)) |
| .toString(); |
| } catch (CharacterCodingException e) { |
| throw new IllegalStateException("Failed to deserialize string", e); |
| } |
| } |
| } |