org.apache.commons.compress.archivers.zip
Class ExtraFieldUtils

java.lang.Object
  org.apache.commons.compress.archivers.zip.ExtraFieldUtils

public class ExtraFieldUtils
extends Object

ZipExtraField related methods

Constructor Summary

ExtraFieldUtils()

Method Summary

static ZipExtraField	createExtraField(ZipShort headerId) Create an instance of the approriate ExtraField, falls back to UnrecognizedExtraField.
static byte[]	mergeCentralDirectoryData(ZipExtraField[] data) Merges the central directory fields of the given ZipExtraFields.
static byte[]	mergeLocalFileDataData(ZipExtraField[] data) Merges the local file data fields of the given ZipExtraFields.
static ZipExtraField[]	parse(byte[] data) Split the array into ExtraFields and populate them with the given data as local file data.
static ZipExtraField[]	parse(byte[] data, boolean local) Split the array into ExtraFields and populate them with the given data.
static void	register(Class c) Register a ZipExtraField implementation.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtraFieldUtils

public ExtraFieldUtils()

Method Detail

register

public static void register(Class c)

Register a ZipExtraField implementation.

The given class must have a no-arg constructor and implement the ZipExtraField interface.

Parameters:

c - the class to register

createExtraField

public static ZipExtraField createExtraField(ZipShort headerId)
                                      throws InstantiationException,
                                             IllegalAccessException

Create an instance of the approriate ExtraField, falls back to UnrecognizedExtraField.

Parameters:

headerId - the header identifier

Returns:

an instance of the appropiate ExtraField

Throws:

InstantiationException - if unable to instantiate the class

IllegalAccessException - if not allowed to instatiate the class

parse

public static ZipExtraField[] parse(byte[] data)
                             throws ZipException

Split the array into ExtraFields and populate them with the given data as local file data.

Parameters:

data - an array of bytes as it appears in local file data

Returns:

an array of ExtraFields

Throws:

ZipException - on error

parse

public static ZipExtraField[] parse(byte[] data,
                                    boolean local)
                             throws ZipException

Split the array into ExtraFields and populate them with the given data.

Parameters:

data - an array of bytes

local - whether data originates from the local file data or the central directory

Returns:

an array of ExtraFields

Throws:

ZipException - on error

mergeLocalFileDataData

public static byte[] mergeLocalFileDataData(ZipExtraField[] data)

Merges the local file data fields of the given ZipExtraFields.

Parameters:

data - an array of ExtraFiles

Returns:

an array of bytes

mergeCentralDirectoryData

public static byte[] mergeCentralDirectoryData(ZipExtraField[] data)

Merges the central directory fields of the given ZipExtraFields.

Parameters:

data - an array of ExtraFields

Returns:

an array of bytes