weka.core.converters

## Class AbstractFileSaver

- java.lang.Object
- - weka.core.converters.AbstractSaver
  - - weka.core.converters.AbstractFileSaver

- All Implemented Interfaces:
    java.io.Serializable, CapabilitiesHandler, CapabilitiesIgnorer, FileSourcedConverter, Saver, EnvironmentHandler, OptionHandler, RevisionHandler
  Direct Known Subclasses:
    ArffSaver, C45Saver, CSVSaver, JSONSaver, LibSVMSaver, MatlabSaver, SerializedInstancesSaver, SVMLightSaver, XRFFSaver

      public abstract class AbstractFileSaver
      extends AbstractSaver
      implements OptionHandler, FileSourcedConverter, EnvironmentHandler

  Abstract class for Savers that save to a file Valid options are: -i input arff file
  The input filw in arff format.

  -o the output file
  The output file. The prefix of the output file is sufficient. If no output file is given, Saver tries to use standard out.

  Version:
    $Revision: 10233 $
  Author:
    Richard Kirkby (rkirkby@cs.waikato.ac.nz), Stefan Mutter (mutter@cs.waikato.ac.nz)
  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from interface weka.core.converters.Saver

      `BATCH, INCREMENTAL, NONE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractFileSaver()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `cancel()` Cancels the incremental saving process.
    `java.lang.String` | `filePrefix()` Gets the file name prefix
    `abstract java.lang.String` | `getFileDescription()` to be pverridden
    `java.lang.String` | `getFileExtension()` Gets ihe file extension.
    `java.lang.String[]` | `getFileExtensions()` Gets all the file extensions used for this type of file
    `java.lang.String[]` | `getOptions()` Gets the current settings of the Saver object.
    `boolean` | `getUseRelativePath()` Gets whether relative paths are to be used
    `java.io.BufferedWriter` | `getWriter()` Gets the writer
    `java.util.Enumeration<Option>` | `listOptions()` Returns an enumeration describing the available options.
    `void` | `resetOptions()` resets the options
    `void` | `resetWriter()` Sets the writer to null.
    `java.lang.String` | `retrieveDir()` Gets the directory
    `java.io.File` | `retrieveFile()` Gets the destination file.
    `static void` | `runFileSaver(AbstractFileSaver saver, java.lang.String[] options)` runs the given saver with the specified options
    `void` | `setDestination(java.io.File file)` Sets the destination file (and directories if necessary).
    `void` | `setDestination(java.io.OutputStream output)` Sets the destination output stream.
    `void` | `setDir(java.lang.String dir)` Sets the directory where the instances should be stored
    `void` | `setDirAndPrefix(java.lang.String relationName, java.lang.String add)` Sets the directory and the file prefix.
    `void` | `setEnvironment(Environment env)` Set the environment variables to use.
    `void` | `setFile(java.io.File outputFile)` Sets the destination file.
    `void` | `setFilePrefix(java.lang.String prefix)` Sets the file name prefix
    `void` | `setOptions(java.lang.String[] options)` Parses a given list of options.
    `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.AbstractSaver

      `doNotCheckCapabilitiesTipText, getCapabilities, getDoNotCheckCapabilities, getInstances, getWriteMode, resetStructure, setDoNotCheckCapabilities, setInstances, setRetrieval, setStructure, writeBatch, writeIncremental`

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

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

    - ### Methods inherited from interface weka.core.RevisionHandler

      `getRevision`

- - ### Constructor Detail

    - #### AbstractFileSaver

          public AbstractFileSaver()

  - ### Method Detail

    - #### resetOptions

          public void resetOptions()

      resets the options
      Overrides:
        `resetOptions` in class `AbstractSaver`

    - #### getWriter

          public java.io.BufferedWriter getWriter()

      Gets the writer
      Returns:
        the BufferedWriter

    - #### resetWriter

          public void resetWriter()

      Sets the writer to null.

    - #### getFileExtension

          public java.lang.String getFileExtension()

      Gets ihe file extension.
      Specified by:
        `getFileExtension` in interface `FileSourcedConverter`
      Specified by:
        `getFileExtension` in interface `Saver`
      Overrides:
        `getFileExtension` in class `AbstractSaver`
      Returns:
        the file extension as a string.

    - #### getFileExtensions

          public java.lang.String[] getFileExtensions()

      Gets all the file extensions used for this type of file
      Specified by:
        `getFileExtensions` in interface `FileSourcedConverter`
      Returns:
        the file extensions

    - #### retrieveFile

          public java.io.File retrieveFile()

      Gets the destination file.
      Specified by:
        `retrieveFile` in interface `FileSourcedConverter`
      Returns:
        the destination file.

    - #### setFile

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

      Sets the destination file.
      Specified by:
        `setFile` in interface `FileSourcedConverter`
      Specified by:
        `setFile` in interface `Saver`
      Overrides:
        `setFile` in class `AbstractSaver`
      Parameters:
        `outputFile` - the destination file.
      Throws:
        `java.io.IOException` - throws an IOException if file cannot be set

    - #### setFilePrefix

          public void setFilePrefix(java.lang.String prefix)

      Sets the file name prefix
      Specified by:
        `setFilePrefix` in interface `Saver`
      Overrides:
        `setFilePrefix` in class `AbstractSaver`
      Parameters:
        `prefix` - the file name prefix

    - #### filePrefix

          public java.lang.String filePrefix()

      Gets the file name prefix
      Specified by:
        `filePrefix` in interface `Saver`
      Overrides:
        `filePrefix` in class `AbstractSaver`
      Returns:
        the prefix of the filename

    - #### setDir

          public void setDir(java.lang.String dir)

      Sets the directory where the instances should be stored
      Specified by:
        `setDir` in interface `Saver`
      Overrides:
        `setDir` in class `AbstractSaver`
      Parameters:
        `dir` - a string containing the directory path and name

    - #### retrieveDir

          public java.lang.String retrieveDir()

      Gets the directory
      Specified by:
        `retrieveDir` in interface `Saver`
      Overrides:
        `retrieveDir` in class `AbstractSaver`
      Returns:
        a string with the file name

    - #### 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

    - #### listOptions

          public java.util.Enumeration<Option> listOptions()

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

    - #### setOptions

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

      Parses a given list of options. Valid option is:

      -i input arff file
      The input filw in arff format.

      -o the output file
      The output file. The prefix of the output file is sufficient. If no output file is given, Saver tries to use standard out.

      Specified by:
        `setOptions` in interface `OptionHandler`
      Parameters:
        `options` - the list of options as an array of strings
      Throws:
        `java.lang.Exception` - if an option is not supported

    - #### getOptions

          public java.lang.String[] getOptions()

      Gets the current settings of the Saver object.
      Specified by:
        `getOptions` in interface `OptionHandler`
      Returns:
        an array of strings suitable for passing to setOptions

    - #### cancel

          public void cancel()

      Cancels the incremental saving process.
      Overrides:
        `cancel` in class `AbstractSaver`

    - #### setDestination

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

      Sets the destination file (and directories if necessary).
      Specified by:
        `setDestination` in interface `Saver`
      Overrides:
        `setDestination` in class `AbstractSaver`
      Parameters:
        `file` - the File
      Throws:
        `java.io.IOException` - always

    - #### setDestination

          public void setDestination(java.io.OutputStream output)
                              throws java.io.IOException

      Sets the destination output stream.
      Specified by:
        `setDestination` in interface `Saver`
      Overrides:
        `setDestination` in class `AbstractSaver`
      Parameters:
        `output` - the output stream.
      Throws:
        `java.io.IOException` - throws an IOException if destination cannot be set

    - #### setDirAndPrefix

          public void setDirAndPrefix(java.lang.String relationName,
                             java.lang.String add)

      Sets the directory and the file prefix. This method is used in the KnowledgeFlow GUI
      Specified by:
        `setDirAndPrefix` in interface `Saver`
      Overrides:
        `setDirAndPrefix` in class `AbstractSaver`
      Parameters:
        `relationName` - the name of the relation to save
        `add` - additional string which should be part of the filename

    - #### getFileDescription

          public abstract java.lang.String getFileDescription()

      to be pverridden
      Specified by:
        `getFileDescription` in interface `FileSourcedConverter`
      Returns:
        the file type description.

    - #### 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

    - #### runFileSaver

          public static void runFileSaver(AbstractFileSaver saver,
                          java.lang.String[] options)

      runs the given saver with the specified options
      Parameters:
        `saver` - the saver to run
        `options` - the commandline options