1 /*
2  * Copyright 2021 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 package android.app.appsearch.observer;
18 
19 import android.annotation.NonNull;
20 
21 /**
22  * An interface which apps can implement to subscribe to notifications of changes to AppSearch data.
23  */
24 public interface ObserverCallback {
25     /**
26      * Callback to trigger after schema changes (schema type added, updated or removed).
27      *
28      * @param changeInfo Information about the nature of the change.
29      */
onSchemaChanged(@onNull SchemaChangeInfo changeInfo)30     void onSchemaChanged(@NonNull SchemaChangeInfo changeInfo);
31 
32     /**
33      * Callback to trigger after document changes (documents added, updated or removed).
34      *
35      * @param changeInfo Information about the nature of the change.
36      */
onDocumentChanged(@onNull DocumentChangeInfo changeInfo)37     void onDocumentChanged(@NonNull DocumentChangeInfo changeInfo);
38 }
39