| /* |
| * Copyright 2015-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.rules.keys; |
| |
| import com.facebook.buck.rules.BuildRule; |
| |
| import java.lang.reflect.Field; |
| |
| import javax.annotation.Nullable; |
| |
| abstract class AbstractAlterRuleKey implements AlterRuleKey { |
| protected final Field field; |
| |
| /** |
| * @param field {@link java.lang.reflect.Field} that is assumed to be accessible. |
| */ |
| public AbstractAlterRuleKey(Field field) { |
| this.field = field; |
| } |
| |
| @Nullable |
| protected Object getValue(Field field, BuildRule from) { |
| try { |
| return field.get(from); |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |