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:
  java.lang.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
`static 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 and Description
`Untar()`

### Method Summary

Methods
`protected void` `expandFile(FileUtils fileUtils, java.io.File srcF, java.io.File dir)` This method is to be overridden by extending unarchival tasks.
`protected void` `expandResource(Resource srcR, java.io.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, getEncoding, getFailOnEmptyArchive, getMapper, getScanForUnicodeExtraFields, internalSetEncoding, internalSetScanForUnicodeExtraFields, 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 Detail

#### Untar

    public Untar()

### Method Detail

#### 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

Parameters:
  `method` - compression method

#### setScanForUnicodeExtraFields

    public void setScanForUnicodeExtraFields(boolean b)

No unicode extra fields in tar.

Overrides:
  `setScanForUnicodeExtraFields` in class `Expand`
Since:
  Ant 1.8.0

#### expandFile

    protected void expandFile(FileUtils fileUtils,
                  java.io.File srcF,
                  java.io.File dir)

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

#### expandResource

    protected void expandResource(Resource srcR,
                      java.io.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