1 /*
2  * Copyright 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 androidx.appsearch.app;
18 
19 import org.jspecify.annotations.NonNull;
20 import org.jspecify.annotations.Nullable;
21 
22 /**
23  * Serializes some {@link T} to and from a long.
24  *
25  * @param <T> The custom type that can be serialized to a long.
26  */
27 // @exportToFramework:skipFile()
28 public interface LongSerializer<T> {
29     /**
30      * Serializes a {@link T} to a long.
31      */
serialize(@onNull T instance)32     long serialize(@NonNull T instance);
33 
34     /**
35      * Deserializes a {@link T} from a long. Returns null if deserialization failed.
36      */
deserialize(long value)37     @Nullable T deserialize(long value);
38 }
39