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## weka.core.converters
Class AbstractFileLoader

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

All Implemented Interfaces:
  java.io.Serializable, FileSourcedConverter, Loader, EnvironmentHandler, RevisionHandler

Direct Known Subclasses:
  ArffLoader, C45Loader, CSVLoader, LibSVMLoader, SerializedInstancesLoader, SVMLightLoader, XRFFLoader

    public abstract class AbstractFileLoader

extends AbstractLoader
implements FileSourcedConverter, EnvironmentHandler

Abstract superclass for all file loaders.

Version:
  $Revision: 4985 $
Author:
  fracpete (fracpete at waikato dot ac dot nz)
See Also:
  Serialized Form

Field Summary
`static java.lang.String` | `FILE_EXTENSION_COMPRESSED` the extension for compressed files

Constructor Summary
`AbstractFileLoader()`

Method Summary
`boolean` | `getUseRelativePath()` Gets whether relative paths are to be used
`void` | `reset()` Resets the loader ready to read a new data set
`java.io.File` | `retrieveFile()` get the File specified as the source
`static void` | `runFileLoader(AbstractFileLoader loader, java.lang.String[] options)` runs the given loader with the provided options
`void` | `setEnvironment(Environment env)` Set the environment variables to use.
`void` | `setFile(java.io.File file)` sets the source File
`void` | `setSource(java.io.File file)` Resets the Loader object and sets the source of the data set to be the supplied File object.
`void` | `setUseRelativePath(boolean rp)` Set whether to use relative rather than absolute paths
`java.lang.String` | `useRelativePathTipText()` Tip text suitable for displaying int the GUI

Methods inherited from class weka.core.converters.AbstractLoader
`getDataSet, getNextInstance, getStructure, setSource`

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

Methods inherited from interface weka.core.converters.FileSourcedConverter
`getFileDescription, getFileExtension, getFileExtensions`

Methods inherited from interface weka.core.RevisionHandler
`getRevision`

Field Detail

### FILE_EXTENSION_COMPRESSED

    public static java.lang.String FILE_EXTENSION_COMPRESSED

  the extension for compressed files

Constructor Detail

### AbstractFileLoader

    public AbstractFileLoader()

Method Detail

### retrieveFile

    public java.io.File retrieveFile()

  get the File specified as the source

  Specified by:
    `retrieveFile` in interface `FileSourcedConverter`
  Returns:
    the source file

### setFile

    public void setFile(java.io.File file)
                 throws java.io.IOException

  sets the source File

  Specified by:
    `setFile` in interface `FileSourcedConverter`
  Parameters:
    `file` - the source file
  Throws:
    `java.io.IOException` - if an error occurs

### setEnvironment

    public void setEnvironment(Environment env)

  Set the environment variables to use.

  Specified by:
    `setEnvironment` in interface `EnvironmentHandler`
  Parameters:
    `env` - the environment variables to use

### reset

    public void reset()
               throws java.io.IOException

  Resets the loader ready to read a new data set

  Specified by:
    `reset` in interface `Loader`
  Overrides:
    `reset` in class `AbstractLoader`
  Throws:
    `java.io.IOException` - if something goes wrong

### setSource

    public void setSource(java.io.File file)
                   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:
    `file` - the source file.
  Throws:
    `java.io.IOException` - if an error occurs

### useRelativePathTipText

    public java.lang.String useRelativePathTipText()

  Tip text suitable for displaying int the GUI

  Returns:
    a description of this property as a String

### setUseRelativePath

    public void setUseRelativePath(boolean rp)

  Set whether to use relative rather than absolute paths

  Specified by:
    `setUseRelativePath` in interface `FileSourcedConverter`
  Parameters:
    `rp` - true if relative paths are to be used

### getUseRelativePath

    public boolean getUseRelativePath()

  Gets whether relative paths are to be used

  Specified by:
    `getUseRelativePath` in interface `FileSourcedConverter`
  Returns:
    true if relative paths are to be used

### runFileLoader

    public static void runFileLoader(AbstractFileLoader loader,
                                     java.lang.String[] options)

  runs the given loader with the provided options

  Parameters:
    `loader` - the loader to run
    `options` - the commandline options, first argument must be the file to load

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