Package org.apache.lucene.analysis.el

Class GreekStemmer

java.lang.Object

org.apache.lucene.analysis.el.GreekStemmer

public class GreekStemmer
extends java.lang.Object

A stemmer for Greek words, according to: Development of a Stemmer for the Greek Language. Georgios Ntais

NOTE: Input is expected to be casefolded for Greek (including folding of final sigma to sigma), and with diacritics removed. This can be achieved with either GreekLowerCaseFilter or ICUFoldingFilter.

Field Summary

Fields

Modifier and Type	Field	Description
private static CharArraySet	exc12a
private static CharArraySet	exc12b
private static CharArraySet	exc13
private static CharArraySet	exc14
private static CharArraySet	exc15a
private static CharArraySet	exc15b
private static CharArraySet	exc16
private static CharArraySet	exc17
private static CharArraySet	exc18
private static CharArraySet	exc19
private static CharArraySet	exc4
private static CharArraySet	exc6
private static CharArraySet	exc7
private static CharArraySet	exc8a
private static CharArraySet	exc8b
private static CharArraySet	exc9

Constructor Summary

Constructors

Constructor	Description
GreekStemmer()

Method Summary

Modifier and Type	Method	Description
private boolean	endsWith(char[] s, int len, java.lang.String suffix)	Checks if the word contained in the leading portion of char[] array , ends with the suffix given as parameter.
private boolean	endsWithVowel(char[] s, int len)	Checks if the word contained in the leading portion of char[] array , ends with a Greek vowel.
private boolean	endsWithVowelNoY(char[] s, int len)	Checks if the word contained in the leading portion of char[] array , ends with a Greek vowel.
private int	rule0(char[] s, int len)
private int	rule1(char[] s, int len)
private int	rule10(char[] s, int len)
private int	rule11(char[] s, int len)
private int	rule12(char[] s, int len)
private int	rule13(char[] s, int len)
private int	rule14(char[] s, int len)
private int	rule15(char[] s, int len)
private int	rule16(char[] s, int len)
private int	rule17(char[] s, int len)
private int	rule18(char[] s, int len)
private int	rule19(char[] s, int len)
private int	rule2(char[] s, int len)
private int	rule20(char[] s, int len)
private int	rule21(char[] s, int len)
private int	rule22(char[] s, int len)
private int	rule3(char[] s, int len)
private int	rule4(char[] s, int len)
private int	rule5(char[] s, int len)
private int	rule6(char[] s, int len)
private int	rule7(char[] s, int len)
private int	rule8(char[] s, int len)
private int	rule9(char[] s, int len)
int	stem(char[] s, int len)	Stems a word contained in a leading portion of a char[] array.

Methods inherited from class java.lang.Object

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

Field Detail

exc4

private static final CharArraySet exc4

exc6

private static final CharArraySet exc6

exc7

private static final CharArraySet exc7

exc8a

private static final CharArraySet exc8a

exc8b

private static final CharArraySet exc8b

exc9

private static final CharArraySet exc9

exc12a

private static final CharArraySet exc12a

exc12b

private static final CharArraySet exc12b

exc13

private static final CharArraySet exc13

exc14

private static final CharArraySet exc14

exc15a

private static final CharArraySet exc15a

exc15b

private static final CharArraySet exc15b

exc16

private static final CharArraySet exc16

exc17

private static final CharArraySet exc17

exc18

private static final CharArraySet exc18

exc19

private static final CharArraySet exc19

Constructor Detail

GreekStemmer

public GreekStemmer()

Method Detail

stem

public int stem(char[] s,
                int len)

Stems a word contained in a leading portion of a char[] array. The word is passed through a number of rules that modify its length.

Parameters:

s - A char[] array that contains the word to be stemmed.

len - The length of the char[] array.

Returns:

The new length of the stemmed word.

rule0

private int rule0(char[] s,
                  int len)

rule1

private int rule1(char[] s,
                  int len)

rule2

private int rule2(char[] s,
                  int len)

rule3

private int rule3(char[] s,
                  int len)

rule4

private int rule4(char[] s,
                  int len)

rule5

private int rule5(char[] s,
                  int len)

rule6

private int rule6(char[] s,
                  int len)

rule7

private int rule7(char[] s,
                  int len)

rule8

private int rule8(char[] s,
                  int len)

rule9

private int rule9(char[] s,
                  int len)

rule10

private int rule10(char[] s,
                   int len)

rule11

private int rule11(char[] s,
                   int len)

rule12

private int rule12(char[] s,
                   int len)

rule13

private int rule13(char[] s,
                   int len)

rule14

private int rule14(char[] s,
                   int len)

rule15

private int rule15(char[] s,
                   int len)

rule16

private int rule16(char[] s,
                   int len)

rule17

private int rule17(char[] s,
                   int len)

rule18

private int rule18(char[] s,
                   int len)

rule19

private int rule19(char[] s,
                   int len)

rule20

private int rule20(char[] s,
                   int len)

rule21

private int rule21(char[] s,
                   int len)

rule22

private int rule22(char[] s,
                   int len)

endsWith

private boolean endsWith(char[] s,
                         int len,
                         java.lang.String suffix)

Checks if the word contained in the leading portion of char[] array , ends with the suffix given as parameter.

Parameters:

s - A char[] array that represents a word.

len - The length of the char[] array.

suffix - A String object to check if the word given ends with these characters.

Returns:

True if the word ends with the suffix given , false otherwise.

endsWithVowel

private boolean endsWithVowel(char[] s,
                              int len)

Checks if the word contained in the leading portion of char[] array , ends with a Greek vowel.

Parameters:

s - A char[] array that represents a word.

len - The length of the char[] array.

Returns:

True if the word contained in the leading portion of char[] array , ends with a vowel , false otherwise.

endsWithVowelNoY

private boolean endsWithVowelNoY(char[] s,
                                 int len)

Checks if the word contained in the leading portion of char[] array , ends with a Greek vowel.

Parameters:

s - A char[] array that represents a word.

len - The length of the char[] array.

Returns:

True if the word contained in the leading portion of char[] array , ends with a vowel , false otherwise.