1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include "AtomMatchingTracker.h"
20 
21 namespace android {
22 namespace os {
23 namespace statsd {
24 
25 struct MatchLogEventResult {
26     MatchingState matchingState;
27     std::shared_ptr<LogEvent> transformedEvent;
28 };
29 
30 class EventMatcherWizard : public virtual RefBase {
31 public:
EventMatcherWizard()32     EventMatcherWizard(){};  // for testing
EventMatcherWizard(const std::vector<sp<AtomMatchingTracker>> & eventTrackers)33     EventMatcherWizard(const std::vector<sp<AtomMatchingTracker>>& eventTrackers)
34         : mAllEventMatchers(eventTrackers),
35           mMatcherCache(eventTrackers.size(), MatchingState::kNotComputed),
36           mMatcherTransformations(eventTrackers.size(), nullptr){};
37 
~EventMatcherWizard()38     virtual ~EventMatcherWizard(){};
39 
40     MatchLogEventResult matchLogEvent(const LogEvent& event, int matcherIndex);
41 
42 private:
43     std::vector<sp<AtomMatchingTracker>> mAllEventMatchers;
44     std::vector<MatchingState> mMatcherCache;
45     std::vector<std::shared_ptr<LogEvent>> mMatcherTransformations;
46 };
47 
48 }  // namespace statsd
49 }  // namespace os
50 }  // namespace android
51