Package opennlp.tools.stemmer

Class SharingStemmer

java.lang.Object

opennlp.tools.stemmer.SharingStemmer

All Implemented Interfaces:

opennlp.tools.stemmer.Stemmer

@ThreadSafe
public final class SharingStemmer
extends Object

A Stemmer that is safe to share across threads by routing each call to a per-thread delegate minted from a StemmerFactory. Use it to share a stemmer whose implementation is not itself thread-safe, such as PorterStemmer; thread-safe implementations like SnowballStemmer do not need this wrapper.

The first thread uses a single owner delegate without touching ThreadLocal until a second thread appears, matching the OwnerOrPerThreadState pattern used by the thread-safe *ME components.

Constructor Summary

Constructors

Constructor	Description
SharingStemmer(opennlp.tools.stemmer.StemmerFactory factory)

Method Summary

Modifier and Type	Method	Description
void	clearThreadLocalState()	Removes this thread's payload to prevent classloader leaks in container environments.
CharSequence	stem(CharSequence word)
List<CharSequence>	stemAll(CharSequence word)

Methods inherited from class java.lang.Object

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

Constructor Details

SharingStemmer

public SharingStemmer(opennlp.tools.stemmer.StemmerFactory factory)

Parameters:

factory - The factory that mints per-thread delegates. Must not be null.

Throws:

IllegalArgumentException - if factory is null.

Method Details

stem

public CharSequence stem(CharSequence word)

stemAll

public List<CharSequence> stemAll(CharSequence word)

clearThreadLocalState

public void clearThreadLocalState()

Removes this thread's payload to prevent classloader leaks in container environments. Call when the thread is returned to a pool or the stemmer is no longer needed, mirroring clearThreadLocalState() on the thread-safe *ME components.