org.apache.lucene.analysis.stempel

Class StempelStemmer

java.lang.Object

org.apache.lucene.analysis.stempel.StempelStemmer

public class StempelStemmer
extends java.lang.Object

Stemmer class is a convenient facade for other stemmer-related classes. The core stemming algorithm and its implementation is taken verbatim from the Egothor project ( www.egothor.org ).

Even though the stemmer tables supplied in the distribution package are built for Polish language, there is nothing language-specific here.

Constructor Summary

Constructors

Constructor and Description
StempelStemmer(java.io.InputStream stemmerTable) Create a Stemmer using selected stemmer table
StempelStemmer(Trie stemmer) Create a Stemmer using pre-loaded stemmer table

Method Summary

Modifier and Type	Method and Description
static Trie	load(java.io.InputStream stemmerTable) Load a stemmer table from an inputstream.
java.lang.StringBuilder	stem(java.lang.CharSequence word) Stem a word.

Methods inherited from class java.lang.Object

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

Constructor Detail

StempelStemmer

public StempelStemmer(java.io.InputStream stemmerTable)
               throws java.io.IOException

Create a Stemmer using selected stemmer table

Parameters:

stemmerTable - stemmer table.

Throws:

java.io.IOException

StempelStemmer

public StempelStemmer(Trie stemmer)

Create a Stemmer using pre-loaded stemmer table

Parameters:

stemmer - pre-loaded stemmer table

Method Detail

load

public static Trie load(java.io.InputStream stemmerTable)
                 throws java.io.IOException

Load a stemmer table from an inputstream.

Throws:

java.io.IOException

stem

public java.lang.StringBuilder stem(java.lang.CharSequence word)

Stem a word.

Parameters:

word - input word to be stemmed.

Returns:

stemmed word, or null if the stem could not be generated.