| /* |
| * Copyright 2012-present Facebook, Inc. |
| * |
| * 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.facebook.buck.util; |
| |
| public enum TriState { |
| TRUE, |
| FALSE, |
| UNSPECIFIED, |
| ; |
| |
| /** @return whether this value is set; that is, whether it is TRUE or FALSE */ |
| public boolean isSet() { |
| return this != UNSPECIFIED; |
| } |
| |
| public boolean asBoolean() { |
| switch (this) { |
| case TRUE: |
| return true; |
| case FALSE: |
| return false; |
| case UNSPECIFIED: |
| throw new IllegalStateException("No boolean equivalent for UNSPECIFIED"); |
| default: |
| throw new IllegalStateException("Unrecognzied TriState value: " + this); |
| } |
| } |
| |
| public static TriState forBooleanValue(boolean value) { |
| return value ? TRUE : FALSE; |
| } |
| } |