org.carrot2.text.preprocessing.filter
Class StopLabelFilter

java.lang.Object
  org.carrot2.text.preprocessing.filter.SingleLabelFilterBase
      org.carrot2.text.preprocessing.filter.StopLabelFilter

All Implemented Interfaces:

ILabelFilter

public class StopLabelFilter
extends SingleLabelFilterBase

Accepts labels that are not declared as stop labels in the stoplabels.<lang> files.

Field Summary

boolean

enabled Remove stop labels.

Constructor Summary

StopLabelFilter()

Method Summary

boolean	acceptPhrase(PreprocessingContext context, int phraseIndex) Should return true if the phrase located at phraseIndex is to be accepted, false otherwise.
boolean	acceptWord(PreprocessingContext context, int wordIndex) Should return true if the word located at wordIndex is to be accepted, false otherwise.
void	filter(PreprocessingContext context, boolean[] acceptedStems, boolean[] acceptedPhrases) Called to perform label filtering.
boolean	isEnabled()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

enabled

public boolean enabled

Remove stop labels. Removes labels that are declared as stop labels in the stoplabels.<lang> files. Please note that adding a long list of regular expressions to the stoplabels file may result in a noticeable performance penalty.

Attribute label:

Remove stop labels

Attribute level:

Basic

Attribute group:

Label filtering

Constructor Detail

StopLabelFilter

public StopLabelFilter()

Method Detail

filter

public void filter(PreprocessingContext context,
                   boolean[] acceptedStems,
                   boolean[] acceptedPhrases)

Description copied from interface: ILabelFilter

Called to perform label filtering.

Specified by:

filter in interface ILabelFilter

Overrides:

filter in class SingleLabelFilterBase

Parameters:

context - contains words and phrases to be filtered

acceptedStems - the filter should set to false those elements that correspond to the stems to be filtered out

acceptedPhrases - the filter should set to false those elements that correspond to the phrases to be filtered out

acceptPhrase

public boolean acceptPhrase(PreprocessingContext context,
                            int phraseIndex)

Description copied from class: SingleLabelFilterBase

Should return true if the phrase located at phraseIndex is to be accepted, false otherwise.

Specified by:

acceptPhrase in class SingleLabelFilterBase

Parameters:

context - provides access to all information about the phrase

phraseIndex - index of the phrase for which decision is to be made

acceptWord

public boolean acceptWord(PreprocessingContext context,
                          int wordIndex)

Description copied from class: SingleLabelFilterBase

Should return true if the word located at wordIndex is to be accepted, false otherwise.

Specified by:

acceptWord in class SingleLabelFilterBase

Parameters:

context - provides access to all information about the word

wordIndex - index of the word for which decision is to be made

isEnabled

public boolean isEnabled()

Returns:

true if the filter is to be applied, false if the filter should be omitted by the LabelFilterProcessor.