Package org.apache.tools.zip

Class ZipUtil

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

    • Constructor Summary

      Constructors 
      Constructor Description
      ZipUtil()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      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 java.util.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​(java.util.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 Detail

      • ZipUtil

        public ZipUtil()

    • Method Detail

      • toDosTime

        public static ZipLong toDosTime​(java.util.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 java.util.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