Package opennlp.tools.stemmer.snowball

Class SnowballStemmerFactory

java.lang.Object

opennlp.tools.stemmer.snowball.SnowballStemmerFactory

All Implemented Interfaces:

opennlp.tools.stemmer.StemmerFactory

@ThreadSafe
public class SnowballStemmerFactory
extends Object
implements opennlp.tools.stemmer.StemmerFactory

A thread-safe factory that captures a Snowball stemmer configuration for APIs that accept a StemmerFactory.

Use this factory for the classic one-stemmer-per-thread pattern: newStemmer() returns a plain, thread-confined stemmer without the per-call thread routing of the shareable SnowballStemmer.

Constructor Summary

Constructors

Constructor	Description
SnowballStemmerFactory(SnowballStemmer.ALGORITHM algorithm)	Creates a factory with repeat = 1.
SnowballStemmerFactory(SnowballStemmer.ALGORITHM algorithm, int repeat)	Creates a factory over the given algorithm and repeat count.

Method Summary

Modifier and Type	Method	Description
opennlp.tools.stemmer.Stemmer	newStemmer()

Methods inherited from class java.lang.Object

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

Constructor Details

SnowballStemmerFactory

public SnowballStemmerFactory(SnowballStemmer.ALGORITHM algorithm)

Creates a factory with repeat = 1.

Parameters:

algorithm - The Snowball algorithm. Must not be null.

Throws:

IllegalArgumentException - if algorithm is null.

SnowballStemmerFactory

public SnowballStemmerFactory(SnowballStemmer.ALGORITHM algorithm,
 int repeat)

Creates a factory over the given algorithm and repeat count.

Parameters:

algorithm - The Snowball algorithm. Must not be null.

repeat - How many times to apply the stemmer per word; must be positive.

Throws:

IllegalArgumentException - if algorithm is null or repeat is not positive.

Method Details

newStemmer

public opennlp.tools.stemmer.Stemmer newStemmer()

Specified by:

newStemmer in interface opennlp.tools.stemmer.StemmerFactory