| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * 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.android.server.integrity.model; |
| |
| import static com.android.internal.util.Preconditions.checkNotNull; |
| |
| /** |
| * Represent rules to be used in the rule evaluation engine to match against app installs. |
| * |
| * <p>Instances of this class are immutable. |
| */ |
| public final class Rule { |
| |
| public enum Effect { |
| DENY |
| } |
| |
| // Holds an empty rule instance. |
| public static final Rule EMPTY = new Rule(); |
| |
| private final Formula mFormula; |
| private final Effect mEffect; |
| |
| private Rule() { |
| this.mFormula = null; |
| this.mEffect = null; |
| } |
| |
| public Rule(Formula formula, Effect effect) { |
| this.mFormula = checkNotNull(formula); |
| this.mEffect = checkNotNull(effect); |
| } |
| |
| /** |
| * Indicates whether the rule is empty or not. |
| * |
| * @return {@code true} if the rule is empty, and {@code false} otherwise. |
| */ |
| public boolean isEmpty() { |
| return mFormula == null && mEffect == null; |
| } |
| |
| public Formula getFormula() { |
| return mFormula; |
| } |
| |
| public Effect getEffect() { |
| return mEffect; |
| } |
| } |