edu.mit.jwi.morph

Interface IStemmingRule

All Superinterfaces:

IHasPOS

All Known Implementing Classes:

StemmingRule

public interface IStemmingRule
extends IHasPOS

A rule for deriving a stem (a.k.a., root or lemma) from a word.

Since:

JWI 2.3.1

Version:

2.4.0

Author:

Mark A. Finlayson

Method Summary

Modifier and Type	Method and Description
String	apply(String word) Applies this rule to the given word.
String	apply(String word, String suffix) Applies this rule to the given word, adding the specified suffix to the end of the returned string.
String	getEnding() Returns the ending for this rule.
String	getSuffix() Returns the suffix for this rule.
Set<String>	getSuffixIgnoreSet() Returns the set of suffixes that should be ignored when applying this stemming rule.

Methods inherited from interface edu.mit.jwi.item.IHasPOS

getPOS

Method Detail

getSuffix

String getSuffix()

Returns the suffix for this rule. Will never return null, empty, or all whitespace.

Returns:

the suffix for this rule.

Since:

JWI 2.3.1

getEnding

String getEnding()

Returns the ending for this rule. Will never return null , empty, or all whitespace.

Returns:

the ending for this rule.

Since:

JWI 2.3.1

getSuffixIgnoreSet

Set<String> getSuffixIgnoreSet()

Returns the set of suffixes that should be ignored when applying this stemming rule. This method will never return null, but it may return an empty set. The ignore set will not include the string returned by getSuffix().

Returns:

a non-null but possibly empty set of suffixes to be ignored

Since:

JWI 2.3.1

apply

String apply(String word)

Applies this rule to the given word. The word should not be null, but may be empty. If the rule cannot be applied to the word, this method returns null. This call is equivalent to calling apply(String, String) with null as the second argument

Parameters:

word - the word to which the stemming rule should be applied.

Returns:

the root of the word, or null if the rule cannot be applied to this word

Since:

JWI 2.3.1

apply

String apply(String word,
             String suffix)

Applies this rule to the given word, adding the specified suffix to the end of the returned string. If the rule cannot be applied to the word, this method returns null.

Parameters:

word - the word to which the stemming rule should be applied.

suffix - a suffix that should be appended to the root once it has been derived; may be null.

Returns:

the root of the word, or null if the rule cannot be applied to this word

Since:

JWI 2.3.1