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## weka.core.converters
Class ConverterUtils.DataSink

    java.lang.Object
      weka.core.converters.ConverterUtils.DataSink

All Implemented Interfaces:
  java.io.Serializable, RevisionHandler

Enclosing class:
  ConverterUtils

    public static class ConverterUtils.DataSink

extends java.lang.Object
implements java.io.Serializable, RevisionHandler

Helper class for saving data to files. Via the ConverterUtils class it determines which converter to use for saving the data. It is the logical counterpart to `DataSource`.

Version:
  $Revision: 6155 $
Author:
  FracPete (fracpete at waikato dot ac dot nz)
See Also:
  `ConverterUtils.DataSource`, Serialized Form

Constructor Summary
`ConverterUtils.DataSink(java.io.OutputStream stream)` initializes the sink to save the data in the stream (always in ARFF format).
`ConverterUtils.DataSink(Saver saver)` initializes the sink to save the data to the given Saver (expected to be fully configured).
`ConverterUtils.DataSink(java.lang.String filename)` initializes the sink to save the data to the given file.

Method Summary
`java.lang.String` | `getRevision()` Returns the revision string.
`static void` | `main(java.lang.String[] args)` for testing only - takes a data file as input and a data file for the output.
`void` | `write(Instances data)` writes the given data either via the saver or to the defined output stream (depending on the constructor).
`static void` | `write(java.io.OutputStream stream, Instances data)` writes the data to the given stream (always in ARFF format).
`static void` | `write(Saver saver, Instances data)` writes the data via the given saver.
`static void` | `write(java.lang.String filename, Instances data)` writes the data to the given file.

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

Constructor Detail

### ConverterUtils.DataSink

    public ConverterUtils.DataSink(java.lang.String filename)
                            throws java.lang.Exception

  initializes the sink to save the data to the given file.

  Parameters:
    `filename` - the file to save data to
  Throws:
    `java.lang.Exception` - if set of saver fails

### ConverterUtils.DataSink

    public ConverterUtils.DataSink(Saver saver)

  initializes the sink to save the data to the given Saver (expected to be fully configured).

  Parameters:
    `saver` - the saver to use for saving the data

### ConverterUtils.DataSink

    public ConverterUtils.DataSink(java.io.OutputStream stream)

  initializes the sink to save the data in the stream (always in ARFF format).

  Parameters:
    `stream` - the output stream to use for storing the data in ARFF format

Method Detail

### write

    public void write(Instances data)
               throws java.lang.Exception

  writes the given data either via the saver or to the defined output stream (depending on the constructor). In case of the stream, the stream is only flushed, but not closed.

  Parameters:
    `data` - the data to save
  Throws:
    `java.lang.Exception` - if saving fails

### write

    public static void write(java.lang.String filename,
                             Instances data)
                      throws java.lang.Exception

  writes the data to the given file.

  Parameters:
    `filename` - the file to write the data to
    `data` - the data to store
  Throws:
    `java.lang.Exception` - if writing fails

### write

    public static void write(Saver saver,
                             Instances data)
                      throws java.lang.Exception

  writes the data via the given saver.

  Parameters:
    `saver` - the saver to use for writing the data
    `data` - the data to store
  Throws:
    `java.lang.Exception` - if writing fails

### write

    public static void write(java.io.OutputStream stream,
                             Instances data)
                      throws java.lang.Exception

  writes the data to the given stream (always in ARFF format).

  Parameters:
    `stream` - the stream to write the data to (ARFF format)
    `data` - the data to store
  Throws:
    `java.lang.Exception` - if writing fails

### main

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

  for testing only - takes a data file as input and a data file for the output.

  Parameters:
    `args` - the commandline arguments
  Throws:
    `java.lang.Exception` - if something goes wrong

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

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

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