-
Notifications
You must be signed in to change notification settings - Fork 76
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #502 from keithc-ca/date
Avoid non-portable uses of date utility
- Loading branch information
Showing
5 changed files
with
117 additions
and
40 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * =========================================================================== | ||
| * (c) Copyright IBM Corp. 2022, 2022 All Rights Reserved | ||
| * =========================================================================== | ||
| * This code is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License version 2 only, as | ||
| * published by the Free Software Foundation. | ||
| * | ||
| * IBM designates this particular file as subject to the "Classpath" exception | ||
| * as provided by IBM in the LICENSE file that accompanied this code. | ||
| * | ||
| * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| * version 2 for more details (a copy is included in the LICENSE file that | ||
| * accompanied this code). | ||
| * | ||
| * You should have received a copy of the GNU General Public License version | ||
| * 2 along with this work; if not, see <http://www.gnu.org/licenses/>. | ||
| * =========================================================================== | ||
| */ | ||
| import java.time.Instant; | ||
| import java.time.LocalDate; | ||
| import java.time.LocalDateTime; | ||
| import java.time.ZoneOffset; | ||
| import java.time.format.DateTimeFormatter; | ||
| import java.time.format.DateTimeParseException; | ||
| import java.util.Locale; | ||
|
|
||
| public class DateUtil { | ||
|
|
||
| public static void main(String... args) { | ||
| String date = ""; | ||
| String format = ""; | ||
|
|
||
| for (String arg : args) { | ||
| if (arg.startsWith("--date=")) { | ||
| date = arg.substring(7).trim(); | ||
| } else if (arg.startsWith("--format=")) { | ||
| format = arg.substring(9).trim(); | ||
| } else { | ||
| showUsageAndExit(); | ||
| } | ||
| } | ||
|
|
||
| LocalDateTime time = parseTime(date); | ||
|
|
||
| if (format.isEmpty()) { | ||
| System.out.println(time.toEpochSecond(ZoneOffset.UTC)); | ||
| } else { | ||
| DateTimeFormatter formatter = DateTimeFormatter.ofPattern(format, Locale.ROOT); | ||
|
|
||
| System.out.println(formatter.format(time)); | ||
| } | ||
| } | ||
|
|
||
| private static LocalDateTime parseTime(String text) { | ||
| if (text.isEmpty()) { | ||
| return LocalDateTime.now(ZoneOffset.UTC); | ||
| } | ||
|
|
||
| if (text.matches("\\d+")) { | ||
| return LocalDateTime.ofEpochSecond(Long.parseLong(text), 0, ZoneOffset.UTC); | ||
| } | ||
|
|
||
| try { | ||
| return LocalDateTime.ofInstant(Instant.parse(text), ZoneOffset.UTC); | ||
| } catch (DateTimeParseException e) { | ||
| // try next format | ||
| } | ||
|
|
||
| try { | ||
| return LocalDateTime.parse(text); | ||
| } catch (DateTimeParseException e) { | ||
| // try next format | ||
| } | ||
|
|
||
| try { | ||
| return LocalDate.parse(text).atStartOfDay(); | ||
| } catch (DateTimeParseException e) { | ||
| System.err.format("Cannot parse time: '%s'%n", text); | ||
| System.exit(1); | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| private static void showUsageAndExit() { | ||
| System.err.println("Usage: DateUtil [options]"); | ||
| System.err.println(" --date=<time> time in epoch seconds, or in iso-8601 or yyyy-MM-dd format"); | ||
| System.err.println(" --format=<format> output format"); | ||
| System.exit(1); | ||
| } | ||
|
|
||
| } |