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

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

public class ExtraFieldUtils
extends java.lang.Object

ZipExtraField related methods

Version:

$Revision: 155439 $

Author:

Stefan Bodewig

Field Summary

private static java.util.Hashtable

c_implementations Static registry of known extra fields.

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 give data.
static void	register(java.lang.Class clazz) Register a ZipExtraField implementation.

Methods inherited from class java.lang.Object

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

Field Detail

c_implementations

private static final java.util.Hashtable c_implementations

Static registry of known extra fields.

Since:

1.1

Constructor Detail

ExtraFieldUtils

public ExtraFieldUtils()

Method Detail

createExtraField

public static ZipExtraField createExtraField(ZipShort headerID)
                                      throws java.lang.InstantiationException,
                                             java.lang.IllegalAccessException

Create an instance of the approriate ExtraField, falls back to UnrecognizedExtraField. Throws java.lang.IllegalAccessException if cant create implementation.

Parameters:

headerID - the header ID

Returns:

the extra field implementation

Throws:

java.lang.InstantiationException - if cant create implementation

java.lang.IllegalAccessException - if cant create implementation

Since:

1.1

mergeCentralDirectoryData

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

Merges the central directory fields of the given ZipExtraFields.

Parameters:

data - the central directory data

Returns:

the merged data

Since:

1.1

mergeLocalFileDataData

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

Merges the local file data fields of the given ZipExtraFields.

Parameters:

data - the data

Returns:

the merged data

Since:

1.1

parse

public static ZipExtraField[] parse(byte[] data)
                             throws java.util.zip.ZipException

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

Parameters:

data - the data to parse

Returns:

the parsed fields

Throws:

java.util.zip.ZipException - on error

Since:

1.1

register

public static void register(java.lang.Class clazz)

Register a ZipExtraField implementation.

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

Parameters:

clazz - The Class for particular implementation

Since:

1.1