| // Copyright 2017 The Bazel Authors. All rights reserved. |
| // |
| // 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.devtools.build.lib.skyframe.serialization.strings; |
| |
| import static com.google.devtools.build.lib.skyframe.serialization.UnsafeJdk9StringCodec.canUseUnsafeCodec; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.skyframe.serialization.CodecRegisterer; |
| import com.google.devtools.build.lib.skyframe.serialization.ObjectCodec; |
| import com.google.devtools.build.lib.skyframe.serialization.UnsafeJdk9StringCodec; |
| |
| /** Utility for accessing (potentially platform-specific) {@link String} {@link ObjectCodec}s. */ |
| public final class StringCodecs { |
| |
| private static final StringCodec stringCodec = new StringCodec(); |
| |
| private static final UnsafeJdk9StringCodec unsafeCodec = |
| canUseUnsafeCodec() ? new UnsafeJdk9StringCodec() : null; |
| |
| /** |
| * Returns optimized singleton instance, if supported. Otherwise, returns a functional, but not |
| * optimized implementation. Currently supported on JDK9. |
| */ |
| public static ObjectCodec<String> asciiOptimized() { |
| return unsafeCodec != null ? unsafeCodec : stringCodec; |
| } |
| |
| static class UnsafeStringCodecRegisterer implements CodecRegisterer<UnsafeJdk9StringCodec> { |
| @Override |
| public Iterable<? extends ObjectCodec<?>> getCodecsToRegister() { |
| return canUseUnsafeCodec() ? ImmutableList.of(unsafeCodec) : ImmutableList.of(); |
| } |
| } |
| |
| static class SimpleStringCodecRegisterer implements CodecRegisterer<StringCodec> { |
| @Override |
| public Iterable<StringCodec> getCodecsToRegister() { |
| return canUseUnsafeCodec() ? ImmutableList.of() : ImmutableList.of(stringCodec); |
| } |
| } |
| |
| /** Returns singleton instance of basic implementation. */ |
| public static ObjectCodec<String> simple() { |
| return stringCodec; |
| } |
| } |