| // 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.skyframe; |
| |
| /** Use when only a single evaluation of the graph with a single constant version is expected. */ |
| public class ConstantVersion implements Version { |
| public static final ConstantVersion INSTANCE = new ConstantVersion(); |
| |
| private ConstantVersion() {} |
| |
| @Override |
| public boolean atMost(Version other) { |
| return this.equals(other); |
| } |
| } |