weka.filters
Class NullFilter
java.lang.Object
|
+--weka.filters.Filter
|
+--weka.filters.NullFilter
- All Implemented Interfaces:
- Serializable
- public class NullFilter
- extends Filter
A simple instance filter that allows no instances to pass
through. Basically just for testing purposes.
- Version:
- $Revision: 1.7 $
- Author:
- Len Trigg (trigg@cs.waikato.ac.nz)
- See Also:
- Serialized Form
Method Summary |
boolean |
input(Instance instance)
Input an instance for filtering. |
static void |
main(String[] argv)
Main method for testing this class. |
boolean |
setInputFormat(Instances instanceInfo)
Sets the format of the input instances. |
Methods inherited from class weka.filters.Filter |
batchFilterFile, batchFinished, bufferInput, copyStringValues, copyStringValues, filterFile, flushInput, getInputFormat, getInputStringIndex, getOutputFormat, getOutputStringIndex, getStringIndices, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputFormatPeek, outputPeek, push, resetQueue, setOutputFormat, useFilter |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
NullFilter
public NullFilter()
setInputFormat
public boolean setInputFormat(Instances instanceInfo)
throws Exception
- Sets the format of the input instances.
- Overrides:
setInputFormat
in class Filter
- Parameters:
instanceInfo
- an Instances object containing the input instance
structure (any instances contained in the object are ignored - only the
structure is required).
- Returns:
- true if the outputFormat may be collected immediately
- Throws:
Exception
- if the inputFormat can't be set successfully
input
public boolean input(Instance instance)
- Input an instance for filtering. Ordinarily the instance is processed
and made available for output immediately. Some filters require all
instances be read before producing output.
- Overrides:
input
in class Filter
- Parameters:
instance
- the input instance
- Returns:
- true if the filtered instance may now be
collected with output().
- Throws:
IllegalStateException
- if no input format has been set.
main
public static void main(String[] argv)
- Main method for testing this class.
- Parameters:
argv
- should contain arguments to the filter: use -h for help