java.lang.Object
- org.apache.lucene.analysis.en.KStemmer

public class KStemmer
extends java.lang.Object

This class implements the Kstem algorithm

Nested Class Summary

Nested Classes
Modifier and Type Class Description

(package private) static class KStemmer.DictEntry

Field Summary

Fields
Modifier and Type	Field	Description
`private static char[]`	`ation`
`private static java.lang.String[][]`	`countryNationality`
`private static CharArrayMap<KStemmer.DictEntry>`	`dict_ht`
`private static java.lang.String[][]`	`directConflations`
`private static java.lang.String[]`	`exceptionWords`
`private static char[]`	`ication`
`private static char[]`	`ition`
`private static char[]`	`ization`
`private int`	`j`
`private int`	`k`
`(package private) KStemmer.DictEntry`	`matchedEntry`
`private static int`	`MaxWordLen`
`private static java.lang.String[]`	`properNouns`
`(package private) java.lang.String`	`result`
`private static java.lang.String[]`	`supplementDict`
`private OpenStringBuilder`	`word`	caching off private int maxCacheSize; private CharArrayMap cache = null; private static final String SAME = "SAME"; // use if stemmed form is the same

Constructor Summary

Constructors
Constructor Description

KStemmer()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private void`	`alEndings()`
`(package private) java.lang.CharSequence`	`asCharSequence()`
`private void`	`aspect()`
`(package private) java.lang.String`	`asString()`	Returns the result of the stem (assuming the word was changed) as a String.
`private void`	`bleEndings()`
`private boolean`	`doubleC(int i)`
`private boolean`	`endsIn(char[] s)`
`private boolean`	`endsIn(char a, char b)`
`private boolean`	`endsIn(char a, char b, char c)`
`private boolean`	`endsIn(char a, char b, char c, char d)`
`private void`	`erAndOrEndings()`
`private char`	`finalChar()`
`(package private) char[]`	`getChars()`
`(package private) int`	`getLength()`
`(package private) java.lang.String`	`getString()`
`private void`	`icEndings()`
`private static CharArrayMap<KStemmer.DictEntry>`	`initializeDictHash()`
`private void`	`ionEndings()`
`private boolean`	`isAlpha(char ch)`
`private boolean`	`isCons(int index)`
`private void`	`ismEndings()`
`private boolean`	`isVowel(int index)`
`private void`	`ityEndings()`
`private void`	`iveEndings()`
`private void`	`izeEndings()`
`private boolean`	`lookup()`
`private void`	`lyEndings()`
`private boolean`	`matched()`
`private void`	`mentEndings()`
`private void`	`nceEndings()`
`private void`	`ncyEndings()`
`private void`	`nessEndings()`
`private void`	`pastTense()`
`private char`	`penultChar()`
`private void`	`plural()`
`private void`	`setSuff(java.lang.String s, int len)`
`private void`	`setSuffix(java.lang.String s)`
`(package private) boolean`	`stem(char[] term, int len)`	Stems the text in the token.
`(package private) java.lang.String`	`stem(java.lang.String term)`
`private int`	`stemLength()`
`private boolean`	`vowelInStem()`
`private KStemmer.DictEntry`	`wordInDict()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MaxWordLen
```
private static final int MaxWordLen
```
See Also:

Constant Field Values

exceptionWords

private static final java.lang.String[] exceptionWords

directConflations

private static final java.lang.String[][] directConflations

countryNationality

private static final java.lang.String[][] countryNationality

supplementDict

private static final java.lang.String[] supplementDict

properNouns

private static final java.lang.String[] properNouns

dict_ht

private static final CharArrayMap<KStemmer.DictEntry> dict_ht

word
```
private final OpenStringBuilder word
```
caching off private int maxCacheSize; private CharArrayMap cache = null; private static final String SAME = "SAME"; // use if stemmed form is the same

j
```
private int j
```

k
```
private int k
```

matchedEntry
```
KStemmer.DictEntry matchedEntry
```

ization
```
private static char[] ization
```

ition
```
private static char[] ition
```

ation
```
private static char[] ation
```

ication
```
private static char[] ication
```

result
```
java.lang.String result
```

Constructor Detail
- KStemmer
```
KStemmer()
```

Method Detail

finalChar
```
private char finalChar()
```

penultChar
```
private char penultChar()
```

isVowel

private boolean isVowel(int index)

isCons
```
private boolean isCons(int index)
```

initializeDictHash

private static CharArrayMap<KStemmer.DictEntry> initializeDictHash()

isAlpha
```
private boolean isAlpha(char ch)
```

stemLength
```
private int stemLength()
```

endsIn
```
private boolean endsIn(char[] s)
```

endsIn

private boolean endsIn(char a,
                       char b)

endsIn

private boolean endsIn(char a,
                       char b,
                       char c)

endsIn

private boolean endsIn(char a,
                       char b,
                       char c,
                       char d)

wordInDict

private KStemmer.DictEntry wordInDict()

plural
```
private void plural()
```

setSuffix

private void setSuffix(java.lang.String s)

setSuff

private void setSuff(java.lang.String s,
                     int len)

lookup
```
private boolean lookup()
```

pastTense
```
private void pastTense()
```

doubleC
```
private boolean doubleC(int i)
```

vowelInStem
```
private boolean vowelInStem()
```

aspect
```
private void aspect()
```

ityEndings
```
private void ityEndings()
```

nceEndings
```
private void nceEndings()
```

nessEndings
```
private void nessEndings()
```

ismEndings
```
private void ismEndings()
```

mentEndings
```
private void mentEndings()
```

izeEndings
```
private void izeEndings()
```

ncyEndings
```
private void ncyEndings()
```

bleEndings
```
private void bleEndings()
```

icEndings
```
private void icEndings()
```

ionEndings
```
private void ionEndings()
```

erAndOrEndings
```
private void erAndOrEndings()
```

lyEndings
```
private void lyEndings()
```

alEndings
```
private void alEndings()
```

iveEndings
```
private void iveEndings()
```

stem

java.lang.String stem(java.lang.String term)

asString
```
java.lang.String asString()
```
Returns the result of the stem (assuming the word was changed) as a String.

asCharSequence

java.lang.CharSequence asCharSequence()

getString
```
java.lang.String getString()
```

getChars
```
char[] getChars()
```

getLength
```
int getLength()
```

matched
```
private boolean matched()
```

stem
```
boolean stem(char[] term,
             int len)
```
Stems the text in the token. Returns true if changed.

Class KStemmer

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MaxWordLen

exceptionWords

directConflations

countryNationality

supplementDict

properNouns

dict_ht

word

j

k

matchedEntry

ization

ition

ation

ication

result

Constructor Detail

KStemmer

Method Detail

finalChar

penultChar

isVowel

isCons

initializeDictHash

isAlpha

stemLength

endsIn

endsIn

endsIn

endsIn

wordInDict

plural

setSuffix

setSuff

lookup

pastTense

doubleC

vowelInStem

aspect

ityEndings

nceEndings

nessEndings

ismEndings

mentEndings

izeEndings

ncyEndings

bleEndings

icEndings

ionEndings

erAndOrEndings

lyEndings

alEndings

iveEndings

stem

asString

asCharSequence

getString

getChars

getLength

matched

stem