Package org.apache.tools.zip

Class ZipUtil

java.lang.Object
org.apache.tools.zip.ZipUtil
public abstract class ZipUtil extends Object
Utility class for handling DOS and Java time conversions.
Since:
Ant 1.8.1

  • Constructor Summary

    Constructors
    Constructor
    Description
    ZipUtil()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static long
    adjustToLong(int i)
    Assumes a negative integer really is a positive integer that has wrapped around and re-creates the original value.
    static long
    dosToJavaTime(long dosTime)
    Converts DOS time to Java time (number of milliseconds since epoch).
    static Date
    fromDosTime(ZipLong zipDosTime)
    Convert a DOS date/time field to a Date object.
    static byte[]
    toDosTime(long t)
    Convert a Date object to a DOS date/time field.
    static void
    toDosTime(long t, byte[] buf, int offset)
    Convert a Date object to a DOS date/time field.
    static ZipLong
    toDosTime(Date time)
    Convert a Date object to a DOS date/time field.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • ZipUtil

      public ZipUtil()

  • Method Details

    • toDosTime

      public static ZipLong toDosTime(Date time)
      Convert a Date object to a DOS date/time field.
      Parameters:
      time - the Date to convert
      Returns:
      the date as a ZipLong

    • toDosTime

      public static byte[] toDosTime(long t)
      Convert a Date object to a DOS date/time field.

      Stolen from InfoZip's fileio.c

      Parameters:
      t - number of milliseconds since the epoch
      Returns:
      the date as a byte array

    • toDosTime

      public static void toDosTime(long t, byte[] buf, int offset)
      Convert a Date object to a DOS date/time field.

      Stolen from InfoZip's fileio.c

      Parameters:
      t - number of milliseconds since the epoch
      buf - the output buffer
      offset - The offset within the output buffer of the first byte to be written. must be non-negative and no larger than buf.length-4

    • adjustToLong

      public static long adjustToLong(int i)
      Assumes a negative integer really is a positive integer that has wrapped around and re-creates the original value.

      This methods is no longer used as of Apache Ant 1.9.0

      Parameters:
      i - the value to treat as unsigned int.
      Returns:
      the unsigned int as a long.

    • fromDosTime

      public static Date fromDosTime(ZipLong zipDosTime)
      Convert a DOS date/time field to a Date object.
      Parameters:
      zipDosTime - contains the stored DOS time.
      Returns:
      a Date instance corresponding to the given time.

    • dosToJavaTime

      public static long dosToJavaTime(long dosTime)
      Converts DOS time to Java time (number of milliseconds since epoch).
      Parameters:
      dosTime - long
      Returns:
      long