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## 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.

For JDK 1.1 "last modified time" field is set to current time instead of being carried from the archive file.

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

FileSet>s 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
`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`

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
`Untar()`

Method Summary
`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` | `setEncoding(java.lang.String encoding)` No encoding support in Untar.

Methods inherited from class org.apache.tools.ant.taskdefs.Expand
`add, add, addFileset, addPatternset, createMapper, execute, extractFile, getMapper, setDest, setOverwrite, setSrc`

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

### setEncoding

    public void setEncoding(java.lang.String encoding)

  No encoding support in Untar.

  Overrides:
    `setEncoding` in class `Expand`
  Parameters:
    `encoding` - not used
  Throws:
    `BuildException` - always
  Since:
    Ant 1.6

### 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

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