1 /*
2  * Copyright (C) 2023 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.federatedcompute.aidl;
18 
19 import android.federatedcompute.aidl.IExampleStoreIteratorCallback;
20 
21 /**
22  * Iterator interface that client apps must implement to return training data to the federated
23  * training service.
24  *
25  * @hide
26  */
27 interface IExampleStoreIterator {
28     /** Called when the training service needs another training example. */
next(in IExampleStoreIteratorCallback callback)29     void next(in IExampleStoreIteratorCallback callback);
30 
31     /** Called by the training service when it is done using this iterator instance. */
close()32     void close();
33 }
34