| commit | author | age | ||
| a6c014 | 1 | /* |
| L | 2 | * Copyright 2018 Google |
| 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 | #import <Foundation/Foundation.h> | |
| 18 | ||
| 19 | @class GDTCOREvent; | |
| 20 | ||
| 21 | NS_ASSUME_NONNULL_BEGIN | |
| 22 | ||
| 23 | /** Defines the API that event transformers must adopt. */ | |
| 24 | @protocol GDTCOREventTransformer <NSObject> | |
| 25 | ||
| 26 | @required | |
| 27 | ||
| 28 | /** Transforms an event by applying some logic to it. Events returned can be nil, for example, in | |
| 29 | * instances where the event should be sampled. | |
| 30 | * | |
| 31 | * @param event The event to transform. | |
| 32 | * @return A transformed event, or nil if the transformation dropped the event. | |
| 33 | */ | |
| 34 | - (nullable GDTCOREvent *)transform:(GDTCOREvent *)event; | |
| 35 | ||
| 36 | @end | |
| 37 | ||
| 38 | NS_ASSUME_NONNULL_END | |
