Package org.apache.tools.ant.taskdefs

# Class Untar

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.Task
org.apache.tools.ant.taskdefs.Expand
org.apache.tools.ant.taskdefs.Untar

All Implemented Interfaces:
  `Cloneable`

public class Untar extends Expand
Untar a file.

PatternSets are used to select files to extract from the archive. If no patternset is used, all files are extracted.

FileSets may be used to select archived files to perform unarchival upon.

File permissions will not be restored on extracted files.

The untar task recognizes the long pathname entries used by GNU tar.

Since:
  Ant 1.1

## Nested Class Summary

Nested Classes
Modifier and Type
Class
Description
`static final class`
`Untar.UntarCompressionMethod`
Valid Modes for Compression attribute to Untar Task

## Field Summary

### Fields inherited from class org.apache.tools.ant.taskdefs.Expand

`ERROR_MULTIPLE_MAPPERS, NATIVE_ENCODING`

### Fields inherited from class org.apache.tools.ant.Task

`target, taskName, taskType, wrapper`

### Fields inherited from class org.apache.tools.ant.ProjectComponent

`description, location, project`

## Constructor Summary

Constructors
Constructor
Description
`Untar()`

## Method Summary

Modifier and Type
Method
Description
`protected void`
`expandFile(FileUtils fileUtils, File srcF, File dir)`
This method is to be overridden by extending unarchival tasks.
`protected void`
`expandResource(Resource srcR, File dir)`
This method is to be overridden by extending unarchival tasks.
`void`
`setCompression(Untar.UntarCompressionMethod method)`
Set decompression algorithm to use; default=none.
`void`
`setScanForUnicodeExtraFields(boolean b)`
No unicode extra fields in tar.

### Methods inherited from class org.apache.tools.ant.taskdefs.Expand

`add, add, addFileset, addPatternset, createMapper, execute, extractFile, getAllowFilesToEscapeDest, getEncoding, getFailOnEmptyArchive, getMapper, getScanForUnicodeExtraFields, internalSetEncoding, internalSetScanForUnicodeExtraFields, setAllowFilesToEscapeDest, setDest, setEncoding, setFailOnEmptyArchive, setOverwrite, setSrc, setStripAbsolutePathSpec`

### Methods inherited from class org.apache.tools.ant.Task

`bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

### Methods inherited from class org.apache.tools.ant.ProjectComponent

`clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject`

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

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

## Constructor Details

### Untar

public Untar()

## Method Details

### setCompression

public void setCompression(Untar.UntarCompressionMethod method)
Set decompression algorithm to use; default=none. Allowable values are

- none - no compression
- gzip - Gzip compression
- bzip2 - Bzip2 compression
- xz - XZ compression, requires XZ for Java

Parameters:
  `method` - compression method

### setScanForUnicodeExtraFields

public void setScanForUnicodeExtraFields(boolean b)
No unicode extra fields in tar.

Overrides:
  `setScanForUnicodeExtraFields` in class `Expand`
Parameters:
  `b` - boolean
Since:
  Ant 1.8.0

### expandFile

protected void expandFile(FileUtils fileUtils, File srcF, File dir)
Description copied from class: `Expand`
This method is to be overridden by extending unarchival tasks.

Overrides:
  `expandFile` in class `Expand`
Parameters:
  `fileUtils` - the fileUtils
  `srcF` - the source file
  `dir` - the destination directory
See Also:
  - Expand.expandFile(FileUtils, File, File)

### expandResource

protected void expandResource(Resource srcR, File dir)
This method is to be overridden by extending unarchival tasks.

Overrides:
  `expandResource` in class `Expand`
Parameters:
  `srcR` - the source resource
  `dir` - the destination directory
Since:
  Ant 1.7