weka.filters
Class MultiFilter

java.lang.Object
  weka.filters.Filter
      weka.filters.SimpleFilter
          weka.filters.SimpleStreamFilter
              weka.filters.MultiFilter

All Implemented Interfaces:

Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, StreamableFilter

public class MultiFilter
extends SimpleStreamFilter

Applies several filters successively. In case all supplied filters are StreamableFilters, it will act as a streamable one, too.

Valid options are:

 -D
  Turns on output of debugging information.

 -F <classname [options]>
  A filter to apply (can be specified multiple times).

Version:

$Revision: 8034 $

Author:

FracPete (fracpete at waikato dot ac dot nz)

See Also:

StreamableFilter, Serialized Form

Constructor Summary

MultiFilter()

Method Summary

boolean	batchFinished() Signify that this batch of input to the filter is finished.
String	filtersTipText() Returns the tip text for this property
Capabilities	getCapabilities() Returns the Capabilities of this filter.
Filter	getFilter(int index) Gets a single filter from the set of available filters.
Filter[]	getFilters() Gets the list of possible filters to choose from.
String[]	getOptions() Gets the current settings of the filter.
String	getRevision() Returns the revision string.
String	globalInfo() Returns a string describing this filter
boolean	isStreamableFilter() tests whether all the enclosed filters are streamable
Enumeration	listOptions() Returns an enumeration describing the available options.
static void	main(String[] args) Main method for executing this class.
boolean	mayRemoveInstanceAfterFirstBatchDone() RemoveWithValues may return false from input() (thus not making an instance available immediately) even after the first batch has been completed due to matching a value that the user wants to remove.
void	setFilters(Filter[] filters) Sets the list of possible filters to choose from.
void	setOptions(String[] options) Parses a list of options for this object.

Methods inherited from class weka.filters.SimpleStreamFilter

input

Methods inherited from class weka.filters.SimpleFilter

debugTipText, getDebug, setDebug, setInputFormat

Methods inherited from class weka.filters.Filter

batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, runFilter, toString, useFilter, wekaStaticWrapper

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MultiFilter

public MultiFilter()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing this filter

Specified by:

globalInfo in class SimpleFilter

Returns:

a description of the filter suitable for displaying in the explorer/experimenter gui

listOptions

public Enumeration listOptions()

Returns an enumeration describing the available options.

Specified by:

listOptions in interface OptionHandler

Overrides:

listOptions in class SimpleFilter

Returns:

an enumeration of all the available options.

setOptions

public void setOptions(String[] options)
                throws Exception

Parses a list of options for this object.

Valid options are:

 -D
  Turns on output of debugging information.

 -F <classname [options]>
  A filter to apply (can be specified multiple times).

Specified by:

setOptions in interface OptionHandler

Overrides:

setOptions in class SimpleFilter

Parameters:

options - the list of options as an array of strings

Throws:

Exception - if an option is not supported

See Also:

SimpleFilter.reset()

getOptions

public String[] getOptions()

Gets the current settings of the filter.

Specified by:

getOptions in interface OptionHandler

Overrides:

getOptions in class SimpleFilter

Returns:

an array of strings suitable for passing to setOptions

getCapabilities

public Capabilities getCapabilities()

Returns the Capabilities of this filter.

Specified by:

getCapabilities in interface CapabilitiesHandler

Overrides:

getCapabilities in class Filter

Returns:

the capabilities of this object

See Also:

Capabilities

setFilters

public void setFilters(Filter[] filters)

Sets the list of possible filters to choose from. Also resets the state of the filter (this reset doesn't affect the options).

Parameters:

filters - an array of filters with all options set.

See Also:

reset()

getFilters

public Filter[] getFilters()

Gets the list of possible filters to choose from.

Returns:

the array of Filters

filtersTipText

public String filtersTipText()

Returns the tip text for this property

Returns:

tip text for this property suitable for displaying in the explorer/experimenter gui

getFilter

public Filter getFilter(int index)

Gets a single filter from the set of available filters.

Parameters:

index - the index of the filter wanted

Returns:

the Filter

isStreamableFilter

public boolean isStreamableFilter()

tests whether all the enclosed filters are streamable

Returns:

true if all the enclosed filters are streamable

batchFinished

public boolean batchFinished()
                      throws Exception

Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances. Any subsequent instances filtered should be filtered based on setting obtained from the first batch (unless the setInputFormat has been re-assigned or new options have been set).

Overrides:

batchFinished in class SimpleStreamFilter

Returns:

true if there are instances pending output

Throws:

IllegalStateException - if no input format has been set.

NullPointerException - if no input structure has been defined,

Exception - if there was a problem finishing the batch.

mayRemoveInstanceAfterFirstBatchDone

public boolean mayRemoveInstanceAfterFirstBatchDone()

RemoveWithValues may return false from input() (thus not making an instance available immediately) even after the first batch has been completed due to matching a value that the user wants to remove. Therefore this method returns true.

Overrides:

mayRemoveInstanceAfterFirstBatchDone in class Filter

Returns:

true if one of the base filters returns true for this method.

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Overrides:

getRevision in class Filter

Returns:

the revision

main

public static void main(String[] args)

Main method for executing this class.

Parameters:

args - should contain arguments for the filter: use -h for help