| // Copyright 2023 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; |
| |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.SerializationConstant; |
| import com.google.errorprone.annotations.Keep; |
| |
| /** |
| * Declares serialization constants for empty optionals. |
| * |
| * <p>Upstream library constants cannot be annotated directly. |
| */ |
| @Keep |
| @SuppressWarnings("rawtypes") |
| final class OptionalConstants { |
| |
| @SerializationConstant |
| static final java.util.Optional EMPTY_JDK_OPTIONAL = java.util.Optional.empty(); |
| |
| @SerializationConstant |
| static final com.google.common.base.Optional EMPTY_GUAVA_OPTIONAL = |
| com.google.common.base.Optional.absent(); |
| |
| private OptionalConstants() {} |
| } |