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## weka.core.converters
Class TextDirectoryLoader

    java.lang.Object
      weka.core.converters.AbstractLoader
          weka.core.converters.TextDirectoryLoader

All Implemented Interfaces:
  java.io.Serializable, BatchConverter, Loader, OptionHandler, RevisionHandler

    public class TextDirectoryLoader

extends AbstractLoader
implements BatchConverter, OptionHandler

Loads all text files in a directory and uses the subdirectory names as class labels. The content of the text files will be stored in a String attribute, the filename can be stored as well.

Valid options are:

     -D
      Enables debug output.
      (default: off)

     -F
      Stores the filename in an additional attribute.
      (default: off)

     -dir <directory>
      The directory to work on.
      (default: current directory)

Based on code from the TextDirectoryToArff tool:

- Original tool
- Current version
- Wiki article

Version:
  $Revision: 7088 $
Author:
  Ashraf M. Kibriya (amk14 at cs.waikato.ac.nz), Richard Kirkby (rkirkby at cs.waikato.ac.nz), fracpete (fracpete at waikato dot ac dot nz)
See Also:
  `Loader`, Serialized Form

Field Summary

Fields inherited from interface weka.core.converters.Loader
`BATCH, INCREMENTAL, NONE`

Constructor Summary
`TextDirectoryLoader()` default constructor

Method Summary
`java.lang.String` | `charSetTipText()` the tip text for this property
`java.lang.String` | `debugTipText()` the tip text for this property
`java.lang.String` | `getCharSet()` Get the character set to use when reading text files.
`Instances` | `getDataSet()` Return the full data set.
`boolean` | `getDebug()` Gets whether additional debug information is printed.
`java.io.File` | `getDirectory()` get the Dir specified as the source
`java.lang.String` | `getFileDescription()` Returns a description of the file type, actually it's directories.
`Instance` | `getNextInstance(Instances structure)` TextDirectoryLoader is unable to process a data set incrementally.
`java.lang.String[]` | `getOptions()` Gets the setting
`boolean` | `getOutputFilename()` Gets whether the filename will be stored as an extra attribute.
`java.lang.String` | `getRevision()` Returns the revision string.
`Instances` | `getStructure()` Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.
`java.lang.String` | `globalInfo()` Returns a string describing this loader
`java.util.Enumeration` | `listOptions()` Lists the available options
`static void` | `main(java.lang.String[] args)` Main method.
`java.lang.String` | `outputFilenameTipText()` the tip text for this property
`void` | `reset()` Resets the loader ready to read a new data set
`void` | `setCharSet(java.lang.String charSet)` Set the character set to use when reading text files (an empty string indicates that the default character set will be used).
`void` | `setDebug(boolean value)` Sets whether to print some debug information.
`void` | `setDirectory(java.io.File dir)` sets the source directory
`void` | `setOptions(java.lang.String[] options)` Parses a given list of options.
`void` | `setOutputFilename(boolean value)` Sets whether the filename will be stored as an extra attribute.
`void` | `setSource(java.io.File dir)` Resets the Loader object and sets the source of the data set to be the supplied File object.

Methods inherited from class weka.core.converters.AbstractLoader
`setRetrieval, setSource`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TextDirectoryLoader

    public TextDirectoryLoader()

  default constructor

Method Detail

### globalInfo

    public java.lang.String globalInfo()

  Returns a string describing this loader

  Returns:
    a description of the evaluator suitable for displaying in the explorer/experimenter gui

### listOptions

    public java.util.Enumeration listOptions()

  Lists the available options

  Specified by:
    `listOptions` in interface `OptionHandler`
  Returns:
    an enumeration of the available options

### setOptions

    public void setOptions(java.lang.String[] options)
                    throws java.lang.Exception

  Parses a given list of options.

  Valid options are:

       -D
        Enables debug output.
        (default: off)

       -F
        Stores the filename in an additional attribute.
        (default: off)

       -dir <directory>
        The directory to work on.
        (default: current directory)

  Specified by:
    `setOptions` in interface `OptionHandler`
  Parameters:
    `options` - the options
  Throws:
    `java.lang.Exception` - if options cannot be set

### getOptions

    public java.lang.String[] getOptions()

  Gets the setting

  Specified by:
    `getOptions` in interface `OptionHandler`
  Returns:
    the current setting

### charSetTipText

    public java.lang.String charSetTipText()

  the tip text for this property

  Returns:
    the tip text

### setCharSet

    public void setCharSet(java.lang.String charSet)

  Set the character set to use when reading text files (an empty string indicates that the default character set will be used).

  Parameters:
    `charSet` - the character set to use.

### getCharSet

    public java.lang.String getCharSet()

  Get the character set to use when reading text files. An empty string indicates that the default character set will be used.

  Returns:
    the character set name to use (or empty string to indicate that the default character set will be used).

### setDebug

    public void setDebug(boolean value)

  Sets whether to print some debug information.

  Parameters:
    `value` - if true additional debug information will be printed.

### getDebug

    public boolean getDebug()

  Gets whether additional debug information is printed.

  Returns:
    true if additional debug information is printed

### debugTipText

    public java.lang.String debugTipText()

  the tip text for this property

  Returns:
    the tip text

### setOutputFilename

    public void setOutputFilename(boolean value)

  Sets whether the filename will be stored as an extra attribute.

  Parameters:
    `value` - if true the filename will be stored in an extra attribute

### getOutputFilename

    public boolean getOutputFilename()

  Gets whether the filename will be stored as an extra attribute.

  Returns:
    true if the filename is stored in an extra attribute

### outputFilenameTipText

    public java.lang.String outputFilenameTipText()

  the tip text for this property

  Returns:
    the tip text

### getFileDescription

    public java.lang.String getFileDescription()

  Returns a description of the file type, actually it's directories.

  Returns:
    a short file description

### getDirectory

    public java.io.File getDirectory()

  get the Dir specified as the source

  Returns:
    the source directory

### setDirectory

    public void setDirectory(java.io.File dir)
                      throws java.io.IOException

  sets the source directory

  Parameters:
    `dir` - the source directory
  Throws:
    `java.io.IOException` - if an error occurs

### reset

    public void reset()

  Resets the loader ready to read a new data set

  Specified by:
    `reset` in interface `Loader`
  Overrides:
    `reset` in class `AbstractLoader`

### setSource

    public void setSource(java.io.File dir)
                   throws java.io.IOException

  Resets the Loader object and sets the source of the data set to be the supplied File object.

  Specified by:
    `setSource` in interface `Loader`
  Overrides:
    `setSource` in class `AbstractLoader`
  Parameters:
    `dir` - the source directory.
  Throws:
    `java.io.IOException` - if an error occurs

### getStructure

    public Instances getStructure()
                           throws java.io.IOException

  Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.

  Specified by:
    `getStructure` in interface `Loader`
  Specified by:
    `getStructure` in class `AbstractLoader`
  Returns:
    the structure of the data set as an empty set of Instances
  Throws:
    `java.io.IOException` - if an error occurs

### getDataSet

    public Instances getDataSet()
                         throws java.io.IOException

  Return the full data set. If the structure hasn't yet been determined by a call to getStructure then method should do so before processing the rest of the data set.

  Specified by:
    `getDataSet` in interface `Loader`
  Specified by:
    `getDataSet` in class `AbstractLoader`
  Returns:
    the structure of the data set as an empty set of Instances
  Throws:
    `java.io.IOException` - if there is no source or parsing fails

### getNextInstance

    public Instance getNextInstance(Instances structure)
                             throws java.io.IOException

  TextDirectoryLoader is unable to process a data set incrementally.

  Specified by:
    `getNextInstance` in interface `Loader`
  Specified by:
    `getNextInstance` in class `AbstractLoader`
  Parameters:
    `structure` - ignored
  Returns:
    never returns without throwing an exception
  Throws:
    `java.io.IOException` - always. TextDirectoryLoader is unable to process a data set incrementally.

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

### main

    public static void main(java.lang.String[] args)

  Main method.

  Parameters:
    `args` - should contain the name of an input file.

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