C# Class Lucene.Net.Analysis.Br.BrazilianStemmer

A stemmer for Brazilian Portuguese words.

Show file Open project: apache/lucenenet Class Usage Examples

Public Methods

Method	Description
BrazilianStemmer ( ) : System.Globalization
Log ( ) : string	For log and debug purpose

Protected Methods

Method	Description
Stem ( string term ) : string	Stems the given term to an unique `discriminator`.

Private Methods

Method	Description
ChangeTerm ( string value ) : string	1) Turn to lowercase 2) Remove accents 3) ã -> a ; õ -> o 4) ç -> c
CreateCT ( string term ) : void	Creates CT (changed term) , substituting * 'ã' and 'õ' for 'a~' and 'o~'.
GetR1 ( string value ) : string	Gets R1 R1 - is the region after the first non-vowel following a vowel, or is the null region at the end of the word if there is no such non-vowel.
GetRV ( string value ) : string	Gets RV RV - IF the second letter is a consonant, RV is the region after the next following vowel, OR if the first two letters are vowels, RV is the region after the next consonant, AND otherwise (consonant-vowel case) RV is the region after the third letter. BUT RV is the end of the word if this positions cannot be found.
IsIndexable ( string term ) : bool	Checks a term if it can be processed indexed.
IsStemmable ( string term ) : bool	Checks a term if it can be processed correctly.
IsVowel ( char value ) : bool	See if string is 'a','e','i','o','u'
RemoveSuffix ( string value, string toRemove ) : string	Remove a string suffix
ReplaceSuffix ( string value, string toReplace, string changeTo ) : string	Replace a string suffix by another
Step1 ( ) : bool	Standard suffix removal. Search for the longest among the following suffixes, and perform the following actions:
Step2 ( ) : bool	Verb suffixes. Search for the longest among the following suffixes in RV, and if found, delete.
Step3 ( ) : void	Delete suffix 'i' if in RV and preceded by 'c'
Step4 ( ) : void	Residual suffix If the word ends with one of the suffixes (os a i o á í ó) in RV, delete it
Step5 ( ) : void	If the word ends with one of ( e é ê) in RV,delete it, and if preceded by 'gu' (or 'ci') with the 'u' (or 'i') in RV, delete the 'u' (or 'i') Or if the word ends ç remove the cedilha
Suffix ( string value, string suffix ) : bool	Check if a string ends with a suffix
SuffixPreceded ( string value, string suffix, string preceded ) : bool	See if a suffix is preceded by a String

Method Details

BrazilianStemmer() public method

public BrazilianStemmer ( ) : System.Globalization
return	System.Globalization

Log() public method

For log and debug purpose

public Log ( ) : string
return	string

Stem() protected method

Stems the given term to an unique discriminator.

protected Stem ( string term ) : string
term	string	The term that should be stemmed.
return	string