diff options
Diffstat (limited to 'java/com/google/gerrit/server/cache/serialize/StringCacheSerializer.java')
-rw-r--r-- | java/com/google/gerrit/server/cache/serialize/StringCacheSerializer.java | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/cache/serialize/StringCacheSerializer.java b/java/com/google/gerrit/server/cache/serialize/StringCacheSerializer.java new file mode 100644 index 0000000000..525b75b2c0 --- /dev/null +++ b/java/com/google/gerrit/server/cache/serialize/StringCacheSerializer.java @@ -0,0 +1,70 @@ +// 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); + } + } +} |