1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.util;
import java.time.temporal.ChronoUnit;
import java.util.concurrent.TimeUnit;
/**
* A {@code DataUnit} represents data sizes at a given unit of granularity and
* provides utility methods to convert across units.
* <p>
* Note that both SI units (powers of 10) and IEC units (powers of 2) are
* supported, and you'll need to pick the correct one for your use-case. For
* example, Wikipedia defines a "kilobyte" as an SI unit of 1000 bytes, and a
* "kibibyte" as an IEC unit of 1024 bytes.
* <p>
* This design is mirrored after {@link TimeUnit} and {@link ChronoUnit}.
*
* @hide
*/
public enum DataUnit {
KILOBYTES { @Override public long toBytes(long v) { return v * 1_000; } },
MEGABYTES { @Override public long toBytes(long v) { return v * 1_000_000; } },
GIGABYTES { @Override public long toBytes(long v) { return v * 1_000_000_000; } },
KIBIBYTES { @Override public long toBytes(long v) { return v * 1_024; } },
MEBIBYTES { @Override public long toBytes(long v) { return v * 1_048_576; } },
GIBIBYTES { @Override public long toBytes(long v) { return v * 1_073_741_824; } };
public long toBytes(long v) {
throw new AbstractMethodError();
}
}
|
