org.at4j.zip.ef
Class InfoZipUnixExtraField

java.lang.Object
  org.at4j.zip.ef.InfoZipUnixExtraField

All Implemented Interfaces:

ZipEntryExtraField

public class InfoZipUnixExtraField
extends Object
implements ZipEntryExtraField

This is the older InfoZip Unix extra field. The central header version contains the last access and modification times. The local header version contains that and information on the file owner UID and GID.

Since:

1.0

Author:

Karl Gustafsson

See Also:

InfoZipUnixExtraFieldFactory, NewInfoZipUnixExtraField

Field Summary

static UnsignedShort

CODE

Constructor Summary

InfoZipUnixExtraField(Date lastAccessTime, Date lastModificationTime)
Create a central header version of this object.

InfoZipUnixExtraField(Date lastAccessTime, Date lastModificationTime, UnsignedShort uid, UnsignedShort gid)
Create a local header version of this object.

Method Summary

byte[]	encode(ZipBuilderConfiguration builder) Encode this extra field's data for storing in a Zip file.
boolean	equals(Object o)
UnsignedShort	getGid() Get the owner group id for the Zip entry.
Date	getLastAccessTime() Get the Zip entry's last access time.
Date	getLastModificationTime() Get the Zip entry's last modification time.
UnsignedShort	getUid() Get the owner user id for the Zip entry.
int	hashCode()
boolean	isInLocalHeader() Is this field stored in the Zip entry's local header or in the Zip file's central directory record?
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

CODE

public static final UnsignedShort CODE

Constructor Detail

InfoZipUnixExtraField

public InfoZipUnixExtraField(Date lastAccessTime,
                             Date lastModificationTime)

Create a central header version of this object.

Parameters:

lastAccessTime - The Zip entry's last access time.

lastModificationTime - The Zip entry's last modification time.

InfoZipUnixExtraField

public InfoZipUnixExtraField(Date lastAccessTime,
                             Date lastModificationTime,
                             UnsignedShort uid,
                             UnsignedShort gid)

Create a local header version of this object.

Parameters:

lastAccessTime - The Zip entry's last access time.

lastModificationTime - The Zip entry's last modification time.

uid - The Zip entry's owner's user id.

gid - The Zip entry's owner's group id.

Method Detail

isInLocalHeader

public boolean isInLocalHeader()

Description copied from interface: ZipEntryExtraField

Is this field stored in the Zip entry's local header or in the Zip file's central directory record?

The same ZipEntryExtraField type may have different properties depending on if it is specified in the local or in the central header.

Specified by:

isInLocalHeader in interface ZipEntryExtraField

Returns:

true if this extra field comes from the Zip entry's local header. false if it comes from the Zip file's central directory.

getUid

public UnsignedShort getUid()

Get the owner user id for the Zip entry.

Returns:

The owner user id, or null if this is the central header version of this object.

getGid

public UnsignedShort getGid()

Get the owner group id for the Zip entry.

Returns:

The owner group id, or null if this is the central header version of this object.

getLastAccessTime

public Date getLastAccessTime()

Get the Zip entry's last access time.

Returns:

The Zip entry's last access time.

getLastModificationTime

public Date getLastModificationTime()

Get the Zip entry's last modification time.

Returns:

The Zip entry's last modification time.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

encode

public byte[] encode(ZipBuilderConfiguration builder)

Description copied from interface: ZipEntryExtraField

Encode this extra field's data for storing in a Zip file. This is used when building Zip files.

Specified by:

encode in interface ZipEntryExtraField

Parameters:

builder - The configuration for the Zip builder object that is building the Zip file.

Returns:

A byte array containing the extra field data as it should be stored in the Zip file. The returned array should not contain the initial four bytes with the extra field code and the extra field length.