1 /*
2  * Copyright (C) 2022 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 com.android.rkpdapp.database;
18 
19 import androidx.room.TypeConverter;
20 
21 import java.time.Instant;
22 
23 /**
24  * Class to provide type conversion for Room database. The field expiration_time in the table is
25  * implemented as long but since we want to handle that as Instant in code, we need to provide these
26  * converters.
27  */
28 public class InstantConverter {
29     /**
30      * Converts from epoch time in milliseconds to an Instant object.
31      */
32     @TypeConverter
fromTimestamp(Long value)33     public static Instant fromTimestamp(Long value) {
34         return value == null ? null : Instant.ofEpochMilli(value);
35     }
36 
37     /**
38      * Converts from an Instant object to epoch time in milliseconds.
39      */
40     @TypeConverter
toTimestamp(Instant time)41     public static Long toTimestamp(Instant time) {
42         return time == null ? null : time.toEpochMilli();
43     }
44 }
45