Package org.apache.tools.zip

# Class JarMarker

java.lang.Object
org.apache.tools.zip.JarMarker

All Implemented Interfaces:
  `ZipExtraField`

public final class JarMarker extends Object implements ZipExtraField
If this extra field is added as the very first extra field of the archive, Solaris will consider it an executable jar file.

Since:
  Ant 1.6.3

## Constructor Summary

Constructors
Constructor
Description
`JarMarker()`
No-arg constructor

## Method Summary

Modifier and Type
Method
Description
`byte[]`
`getCentralDirectoryData()`
The actual data to put central directory - without Header-ID or length specifier.
`ZipShort`
`getCentralDirectoryLength()`
Length of the extra field in the central directory - without Header-ID or length specifier.
`ZipShort`
`getHeaderId()`
The Header-ID.
`static JarMarker`
`getInstance()`
Since JarMarker is stateless we can always use the same instance.
`byte[]`
`getLocalFileDataData()`
The actual data to put into local file data - without Header-ID or length specifier.
`ZipShort`
`getLocalFileDataLength()`
Length of the extra field in the local file data - without Header-ID or length specifier.
`void`
`parseFromLocalFileData(byte[] data, int offset, int length)`
Populate data from this array as if it was in local file data.

### Methods inherited from class java.lang.Object

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

## Constructor Details

### JarMarker

public JarMarker()
No-arg constructor

## Method Details

### getInstance

public static JarMarker getInstance()
Since JarMarker is stateless we can always use the same instance.

Returns:
  the DEFAULT jarmaker.

### getHeaderId

public ZipShort getHeaderId()
The Header-ID.

Specified by:
  `getHeaderId` in interface `ZipExtraField`
Returns:
  the header id

### getLocalFileDataLength

public ZipShort getLocalFileDataLength()
Length of the extra field in the local file data - without Header-ID or length specifier.

Specified by:
  `getLocalFileDataLength` in interface `ZipExtraField`
Returns:
  0

### getCentralDirectoryLength

public ZipShort getCentralDirectoryLength()
Length of the extra field in the central directory - without Header-ID or length specifier.

Specified by:
  `getCentralDirectoryLength` in interface `ZipExtraField`
Returns:
  0

### getLocalFileDataData

public byte[] getLocalFileDataData()
The actual data to put into local file data - without Header-ID or length specifier.

Specified by:
  `getLocalFileDataData` in interface `ZipExtraField`
Returns:
  the data
Since:
  1.1

### getCentralDirectoryData

public byte[] getCentralDirectoryData()
The actual data to put central directory - without Header-ID or length specifier.

Specified by:
  `getCentralDirectoryData` in interface `ZipExtraField`
Returns:
  the data

### parseFromLocalFileData

public void parseFromLocalFileData(byte[] data, int offset, int length) throws ZipException
Populate data from this array as if it was in local file data.

Specified by:
  `parseFromLocalFileData` in interface `ZipExtraField`
Parameters:
  `data` - an array of bytes
  `offset` - the start offset
  `length` - the number of bytes in the array from offset
Throws:
  `ZipException` - on error