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