Apache Ant Core 1.10.14 · org.apache.tools.zip.ZipUtil

Modifier and Type	Field and Description
private static final byte[]	DOS_TIME_MIN Smallest date/time ZIP can handle.

Access	Constructor and Description
public	ZipUtil()

Method Summary

Modifier and Type	Method and Description
public static long	Returns: the unsigned int as a long. adjustToLong(int the value to treat as unsigned int. i) Assumes a negative integer really is a positive integer that has wrapped around and re-creates the original value.
pack-priv static boolean	Returns: boolean canHandleEntryData(ZipEntry entry) Whether this library is able to read or write the given entry.
pack-priv static void	checkRequestedFeatures(ZipEntry ze) Checks whether the entry requires features not (yet) supported by the library and throws an exception if it does.
pack-priv static byte[]	Returns: byte[] copy(byte[] byte[] from) Create a copy of the given array - or return null if the argument is null.
public static long	Returns: long dosToJavaTime(long long dosTime) Converts DOS time to Java time (number of milliseconds since epoch).
public static Date	Returns: a Date instance corresponding to the given time. fromDosTime(ZipLong contains the stored DOS time. zipDosTime) Convert a DOS date/time field to a Date object.
private static String	getUnicodeStringIfOriginalMatches(AbstractUnicodeExtraField AbstractUnicodeExtraField f, byte[] byte[] orig) If the stored CRC matches the one of the given name, return the Unicode name of the given field.
pack-priv static void	setNameAndCommentFromExtraFields(ZipEntry ZipEntry ze, byte[] byte[] originalNameBytes, byte[] byte[] commentBytes) If the entry has Unicode*ExtraFields and the CRCs of the names/comments match those of the extra fields, transfer the known Unicode values from the extra field.
private static boolean	Returns: true if the entry isn't encrypted at all supportsEncryptionOf(ZipEntry entry) Whether this library supports the encryption used by the given entry.
private static boolean	Returns: true if the compression method is STORED or DEFLATED supportsMethodOf(ZipEntry entry) Whether this library supports the compression method used by the given entry.
public static ZipLong	Returns: the date as a `ZipLong` toDosTime(Date the `Date` to convert time) Convert a Date object to a DOS date/time field.
public static byte[]	Returns: the date as a byte array toDosTime(long number of milliseconds since the epoch t) Convert a Date object to a DOS date/time field.
public static void	toDosTime(long number of milliseconds since the epoch t, byte[] the output buffer buf, int The offset within the output buffer of the first byte to be written. must be non-negative and no larger than `buf.length-4` offset) Convert a Date object to a DOS date/time field.
pack-priv static void	toDosTime(Calendar c, long t, byte[] buf, int offset)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

DOS_TIME_MIN	back to summary
private static final byte[] DOS_TIME_MIN Smallest date/time ZIP can handle.

ZipUtil	back to summary
public ZipUtil()

Method Detail

adjustToLong	back to summary
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:int the value to treat as unsigned int. Returns:long the unsigned int as a long.

adjustToLong

back to summary

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:int: the value to treat as unsigned int.

Returns:long

the unsigned int as a long.

canHandleEntryData	back to summary
pack-priv static boolean canHandleEntryData(ZipEntry entry) Whether this library is able to read or write the given entry. Returns:boolean boolean

canHandleEntryData

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pack-priv static boolean canHandleEntryData(ZipEntry entry)

Whether this library is able to read or write the given entry.

Returns:boolean: boolean

checkRequestedFeatures	back to summary
pack-priv static void checkRequestedFeatures(ZipEntry ze) throws UnsupportedZipFeatureException Checks whether the entry requires features not (yet) supported by the library and throws an exception if it does.

copy	back to summary
pack-priv static byte[] copy(byte[] from) Create a copy of the given array - or return null if the argument is null. Parameters from:byte[] byte[] Returns:byte[] byte[]

copy

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pack-priv static byte[] copy(byte[] from)

Create a copy of the given array - or return null if the argument is null.

Parameters

from:byte[]: byte[]

Returns:byte[]

byte[]

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

dosToJavaTime

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public static long dosToJavaTime(long dosTime)

Converts DOS time to Java time (number of milliseconds since epoch).

Parameters

dosTime:long: long

Returns:long

long

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

fromDosTime

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public static Date fromDosTime(ZipLong zipDosTime)

Convert a DOS date/time field to a Date object.

Parameters

zipDosTime:ZipLong: contains the stored DOS time.

Returns:Date

a Date instance corresponding to the given time.

getUnicodeStringIfOriginalMatches	back to summary
private static String getUnicodeStringIfOriginalMatches(AbstractUnicodeExtraField f, byte[] orig) If the stored CRC matches the one of the given name, return the Unicode name of the given field. If the field is null or the CRCs don't match, return null instead. Parameters f:AbstractUnicodeExtraField AbstractUnicodeExtraField orig:byte[] byte[]

getUnicodeStringIfOriginalMatches

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private static String getUnicodeStringIfOriginalMatches(AbstractUnicodeExtraField f, byte[] orig)

If the stored CRC matches the one of the given name, return the Unicode name of the given field.

If the field is null or the CRCs don't match, return null instead.

Parameters

f:AbstractUnicodeExtraField: AbstractUnicodeExtraField
orig:byte[]: byte[]

setNameAndCommentFromExtraFields	back to summary
pack-priv static void setNameAndCommentFromExtraFields(ZipEntry ze, byte[] originalNameBytes, byte[] commentBytes) If the entry has Unicode*ExtraFields and the CRCs of the names/comments match those of the extra fields, transfer the known Unicode values from the extra field. Parameters ze:ZipEntry ZipEntry originalNameBytes:byte[] byte[] commentBytes:byte[] byte[]

setNameAndCommentFromExtraFields

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pack-priv static void setNameAndCommentFromExtraFields(ZipEntry ze, byte[] originalNameBytes, byte[] commentBytes)

If the entry has Unicode*ExtraFields and the CRCs of the names/comments match those of the extra fields, transfer the known Unicode values from the extra field.

Parameters

ze:ZipEntry: ZipEntry
originalNameBytes:byte[]: byte[]
commentBytes:byte[]: byte[]

supportsEncryptionOf	back to summary
private static boolean supportsEncryptionOf(ZipEntry entry) Whether this library supports the encryption used by the given entry. Returns:boolean true if the entry isn't encrypted at all

supportsEncryptionOf

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private static boolean supportsEncryptionOf(ZipEntry entry)

Whether this library supports the encryption used by the given entry.

Returns:boolean: true if the entry isn't encrypted at all

supportsMethodOf	back to summary
private static boolean supportsMethodOf(ZipEntry entry) Whether this library supports the compression method used by the given entry. Returns:boolean true if the compression method is STORED or DEFLATED

supportsMethodOf

back to summary

private static boolean supportsMethodOf(ZipEntry entry)

Whether this library supports the compression method used by the given entry.

Returns:boolean: true if the compression method is STORED or DEFLATED

toDosTime back to summary

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

public static ZipLong toDosTime(Date time)

Convert a Date object to a DOS date/time field.

Parameters

time:Date: the Date to convert

Returns:ZipLong

the date as a ZipLong

toDosTime back to summary

toDosTime	back to summary
public static byte[] toDosTime(long t) Convert a Date object to a DOS date/time field. Stolen from InfoZip's `fileio.c` Parameters t:long number of milliseconds since the epoch Returns:byte[] the date as a byte array

public static byte[] toDosTime(long t)

Convert a Date object to a DOS date/time field.

Stolen from InfoZip's fileio.c

Parameters

t:long: number of milliseconds since the epoch

Returns:byte[]

the date as a byte array

toDosTime back to summary

toDosTime	back to summary
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:long number of milliseconds since the epoch buf:byte[] the output buffer offset:int The offset within the output buffer of the first byte to be written. must be non-negative and no larger than `buf.length-4`

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

public abstract Class ZipUtil

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail