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Class weka.filters.NullFilter

java.lang.Object
    |
    +----weka.filters.Filter
            |
            +----weka.filters.NullFilter

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)

Constructor Index

 o NullFilter()
 

Method Index

 o input(Instance)
Input an instance for filtering.
 o main(String[])
Main method for testing this class.
 o setInputFormat(Instances)
Sets the format of the input instances.

Constructor Detail

 o NullFilter
public NullFilter()

Method Detail

 o setInputFormat
public boolean setInputFormat(Instances instanceInfo) throws java.lang.Exception
          Sets the format of the input instances.
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
Overrides:
setInputFormat in class Filter
 o 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.
Parameters:
instance - the input instance
Returns:
true if the filtered instance may now be collected with output().
Throws:
java.lang.IllegalStateException - if no input format has been set.
Overrides:
input in class Filter
 o main
public static void main(java.lang.String argv[])
          Main method for testing this class.
Parameters:
argv - should contain arguments to the filter: use -h for help

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