PorterStemmer (MorphAdorner)

java.lang.Object
- edu.northwestern.at.morphadorner.corpuslinguistics.stemmer.PorterStemmer

All Implemented Interfaces:

Stemmer
```
public class PorterStemmer
extends java.lang.Object
implements Stemmer
```
Stemmer, implementing the Porter Stemming Algorithm The Stemmer class transforms a word into its root form. The input word can be provided a character at time (by calling add()), or at once by calling one of the various stem(something) methods.

Field Summary

Fields
Modifier and Type Field and Description

protected char[] b

protected int i

protected int i_end

protected static int INC

protected int j

protected int k

Fields
Modifier and Type	Field and Description
`protected char[]`	`b`
`protected int`	`i`
`protected int`	`i_end`
`protected static int`	`INC`
`protected int`	`j`
`protected int`	`k`

Constructor Summary

Constructors
Constructor and Description

PorterStemmer()

Constructors
Constructor and Description
`PorterStemmer()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(char ch)` Add a character to the word being stemmed.
`void`	`add(char[] w, int wLen)` Adds wLen characters to the word being stemmed contained in a portion of a char[] array.
`protected boolean`	`cons(int i)`
`protected boolean`	`cvc(int i)`
`protected boolean`	`doublec(int j)`
`protected boolean`	`ends(java.lang.String s)`
`char[]`	`getResultBuffer()` Returns a reference to a character buffer containing the results of the stemming process.
`int`	`getResultLength()` Returns the length of the word resulting from the stemming process.
`protected int`	`m()`
`protected void`	`r(java.lang.String s)`
`protected void`	`setto(java.lang.String s)`
`void`	`stem()` Stem the word placed into the Stemmer buffer through calls to add().
`java.lang.String`	`stem(java.lang.String word)` Find stem of a single word.
`protected void`	`step1()`
`protected void`	`step2()`
`protected void`	`step3()`
`protected void`	`step4()`
`protected void`	`step5()`
`protected void`	`step6()`
`java.lang.String`	`toString()` After a word has been stemmed, it can be retrieved by toString(), or a reference to the internal buffer can be retrieved by getResultBuffer and getResultLength (which is generally more efficient.)
`protected boolean`	`vowelinstem()`

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

- Field Detail
  - b
```
protected char[] b
```
  - i
```
protected int i
```
  - i_end
```
protected int i_end
```
  - j
```
protected int j
```
  - k
```
protected int k
```
  - INC
```
protected static final int INC
```
    See Also:
    Constant Field Values
- Constructor Detail
  - PorterStemmer
```
public PorterStemmer()
```
- Method Detail
  - add
```
public void add(char ch)
```
    Add a character to the word being stemmed. When you are finished adding characters, you can call stem(void) to stem the word.
  - add
```
public void add(char[] w,
       int wLen)
```
    Adds wLen characters to the word being stemmed contained in a portion of a char[] array. This is like repeated calls of add(char ch), but faster.
  - toString
```
public java.lang.String toString()
```
    After a word has been stemmed, it can be retrieved by toString(), or a reference to the internal buffer can be retrieved by getResultBuffer and getResultLength (which is generally more efficient.)
    
    Overrides:
    
    toString in class java.lang.Object
  - getResultLength
```
public int getResultLength()
```
    Returns the length of the word resulting from the stemming process.
  - getResultBuffer
```
public char[] getResultBuffer()
```
    Returns a reference to a character buffer containing the results of the stemming process. You also need to consult getResultLength() to determine the length of the result.
  - cons
```
protected final boolean cons(int i)
```
  - m
```
protected final int m()
```
  - vowelinstem
```
protected final boolean vowelinstem()
```
  - doublec
```
protected final boolean doublec(int j)
```
  - cvc
```
protected final boolean cvc(int i)
```
  - ends
```
protected final boolean ends(java.lang.String s)
```
  - setto
```
protected final void setto(java.lang.String s)
```
  - r
```
protected final void r(java.lang.String s)
```
  - step1
```
protected final void step1()
```
  - step2
```
protected final void step2()
```
  - step3
```
protected final void step3()
```
  - step4
```
protected final void step4()
```
  - step5
```
protected final void step5()
```
  - step6
```
protected final void step6()
```
  - stem
```
public void stem()
```
    Stem the word placed into the Stemmer buffer through calls to add(). Returns true if the stemming process resulted in a word different from the input. You can retrieve the result with getResultLength()/getResultBuffer() or toString().
  - stem
```
public java.lang.String stem(java.lang.String word)
```
    Description copied from interface: Stemmer
    
    Find stem of a single word.
    
    Specified by:
    
    stem in interface Stemmer
    
    Parameters:
    word - The word whose stem is desired.
    
    Returns:
    The word stem.

Class PorterStemmer

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

b

i

i_end

j

k

INC

Constructor Detail

PorterStemmer

Method Detail

add

add

toString

getResultLength

getResultBuffer

cons

m

vowelinstem

doublec

cvc

ends

setto

r

step1

step2

step3

step4

step5

step6

stem

stem