| // Copyright 2014 Google Inc. 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; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Versioning scheme based on integers. |
| */ |
| public final class IntVersion implements Version, Serializable { |
| |
| private final long val; |
| |
| public IntVersion(long val) { |
| this.val = val; |
| } |
| |
| public long getVal() { |
| return val; |
| } |
| |
| public IntVersion next() { |
| return new IntVersion(val + 1); |
| } |
| |
| @Override |
| public boolean atMost(Version other) { |
| if (!(other instanceof IntVersion)) { |
| return false; |
| } |
| return val <= ((IntVersion) other).val; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Long.valueOf(val).hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof IntVersion) { |
| IntVersion other = (IntVersion) obj; |
| return other.val == val; |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return "IntVersion: " + val; |
| } |
| } |