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src/java.base/share/classes/java/util/zip/ZipUtils.java

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rev 12962 : 8066644: Fix deprecation warnings in jdk.zipfs module
Reviewed-by: sherman
Contributed-by: Peter Levart <peter.levart@gmail.com>, Claes Redestad <claes.redestad@gmail.com>


   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.util.zip;
  27 
  28 import java.nio.file.attribute.FileTime;
  29 import java.util.Date;


  30 import java.util.concurrent.TimeUnit;
  31 
  32 class ZipUtils {
  33 
  34     // used to adjust values between Windows and java epoch
  35     private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
  36 
  37     /**
  38      * Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
  39      */
  40     public static final FileTime winTimeToFileTime(long wtime) {
  41         return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS,
  42                              TimeUnit.MICROSECONDS);
  43     }
  44 
  45     /**
  46      * Converts FileTime to Windows time.
  47      */
  48     public static final long fileTimeToWinTime(FileTime ftime) {
  49         return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10;
  50     }
  51 
  52     /**
  53      * Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime
  54      */
  55     public static final FileTime unixTimeToFileTime(long utime) {
  56         return FileTime.from(utime, TimeUnit.SECONDS);
  57     }
  58 
  59     /**
  60      * Converts FileTime to "standard Unix time".
  61      */
  62     public static final long fileTimeToUnixTime(FileTime ftime) {
  63         return ftime.to(TimeUnit.SECONDS);
  64     }
  65 
  66     /**
  67      * Converts DOS time to Java time (number of milliseconds since epoch).
  68      */
  69     private static long dosToJavaTime(long dtime) {
  70         @SuppressWarnings("deprecation") // Use of date constructor.
  71         Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80),
  72                           (int)(((dtime >> 21) & 0x0f) - 1),
  73                           (int)((dtime >> 16) & 0x1f),
  74                           (int)((dtime >> 11) & 0x1f),
  75                           (int)((dtime >> 5) & 0x3f),
  76                           (int)((dtime << 1) & 0x3e));
  77         return d.getTime();

  78     }
  79 
  80     /**
  81      * Converts extended DOS time to Java time, where up to 1999 milliseconds
  82      * might be encoded into the upper half of the returned long.
  83      *
  84      * @param xdostime the extended DOS time value
  85      * @return milliseconds since epoch
  86      */
  87     public static long extendedDosToJavaTime(long xdostime) {
  88         long time = dosToJavaTime(xdostime);
  89         return time + (xdostime >> 32);
  90     }
  91 
  92     /**
  93      * Converts Java time to DOS time.
  94      */
  95     @SuppressWarnings("deprecation") // Use of date methods
  96     private static long javaToDosTime(long time) {
  97         Date d = new Date(time);
  98         int year = d.getYear() + 1900;
  99         if (year < 1980) {
 100             return ZipEntry.DOSTIME_BEFORE_1980;
 101         }
 102         return ((year - 1980) << 25 | (d.getMonth() + 1) << 21 |
 103                 d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 |
 104                 d.getSeconds() >> 1) & 0xffffffffL;





 105     }
 106 
 107     /**
 108      * Converts Java time to DOS time, encoding any milliseconds lost
 109      * in the conversion into the upper half of the returned long.
 110      *
 111      * @param time milliseconds since epoch
 112      * @return DOS time with 2s remainder encoded into upper half
 113      */
 114     public static long javaToExtendedDosTime(long time) {
 115         if (time < 0) {
 116             return ZipEntry.DOSTIME_BEFORE_1980;
 117         }
 118         long dostime = javaToDosTime(time);
 119         return (dostime != ZipEntry.DOSTIME_BEFORE_1980)
 120                 ? dostime + ((time % 2000) << 32)
 121                 : ZipEntry.DOSTIME_BEFORE_1980;
 122     }
 123 
 124     /**




   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.util.zip;
  27 
  28 import java.nio.file.attribute.FileTime;
  29 import java.time.Instant;
  30 import java.time.LocalDateTime;
  31 import java.time.ZoneId;
  32 import java.util.concurrent.TimeUnit;
  33 
  34 class ZipUtils {
  35 
  36     // used to adjust values between Windows and java epoch
  37     private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
  38 
  39     /**
  40      * Converts Windows time (in microseconds, UTC/GMT) time to FileTime.
  41      */
  42     public static final FileTime winTimeToFileTime(long wtime) {
  43         return FileTime.from(wtime / 10 + WINDOWS_EPOCH_IN_MICROSECONDS,
  44                              TimeUnit.MICROSECONDS);
  45     }
  46 
  47     /**
  48      * Converts FileTime to Windows time.
  49      */
  50     public static final long fileTimeToWinTime(FileTime ftime) {
  51         return (ftime.to(TimeUnit.MICROSECONDS) - WINDOWS_EPOCH_IN_MICROSECONDS) * 10;
  52     }
  53 
  54     /**
  55      * Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime
  56      */
  57     public static final FileTime unixTimeToFileTime(long utime) {
  58         return FileTime.from(utime, TimeUnit.SECONDS);
  59     }
  60 
  61     /**
  62      * Converts FileTime to "standard Unix time".
  63      */
  64     public static final long fileTimeToUnixTime(FileTime ftime) {
  65         return ftime.to(TimeUnit.SECONDS);
  66     }
  67 
  68     /**
  69      * Converts DOS time to Java time (number of milliseconds since epoch).
  70      */
  71     public static long dosToJavaTime(long dtime) {
  72         LocalDateTime ldt = LocalDateTime.of(
  73                 (int) (((dtime >> 25) & 0x7f) + 1980),
  74                 (int) ((dtime >> 21) & 0x0f),
  75                 (int) ((dtime >> 16) & 0x1f),
  76                 (int) ((dtime >> 11) & 0x1f),
  77                 (int) ((dtime >> 5) & 0x3f),
  78                 (int) ((dtime << 1) & 0x3e));
  79         return ldt.toEpochSecond(
  80                 ZoneId.systemDefault().getRules().getOffset(ldt)) * 1000L;
  81     }
  82 
  83     /**
  84      * Converts extended DOS time to Java time, where up to 1999 milliseconds
  85      * might be encoded into the upper half of the returned long.
  86      *
  87      * @param xdostime the extended DOS time value
  88      * @return milliseconds since epoch
  89      */
  90     public static long extendedDosToJavaTime(long xdostime) {
  91         long time = dosToJavaTime(xdostime);
  92         return time + (xdostime >> 32);
  93     }
  94 
  95     /**
  96      * Converts Java time to DOS time.
  97      */

  98     private static long javaToDosTime(long time) {
  99         Instant instant = Instant.ofEpochMilli(time);
 100         LocalDateTime ldt = LocalDateTime.ofInstant(
 101                 instant, ZoneId.systemDefault());
 102         int year = ldt.getYear() - 1980;
 103         if (year < 0) {
 104             return (1 << 21) | (1 << 16);
 105         }
 106         return (year << 25 |
 107             ldt.getMonthValue() << 21 |
 108             ldt.getDayOfMonth() << 16 |
 109             ldt.getHour() << 11 |
 110             ldt.getMinute() << 5 |
 111             ldt.getSecond() >> 1) & 0xffffffffL;
 112     }
 113 
 114     /**
 115      * Converts Java time to DOS time, encoding any milliseconds lost
 116      * in the conversion into the upper half of the returned long.
 117      *
 118      * @param time milliseconds since epoch
 119      * @return DOS time with 2s remainder encoded into upper half
 120      */
 121     public static long javaToExtendedDosTime(long time) {
 122         if (time < 0) {
 123             return ZipEntry.DOSTIME_BEFORE_1980;
 124         }
 125         long dostime = javaToDosTime(time);
 126         return (dostime != ZipEntry.DOSTIME_BEFORE_1980)
 127                 ? dostime + ((time % 2000) << 32)
 128                 : ZipEntry.DOSTIME_BEFORE_1980;
 129     }
 130 
 131     /**


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