edu.northwestern.at.morphadorner.corpuslinguistics.lemmatizer

Interface Lemmatizer

All Known Implementing Classes:

AbstractLemmatizer, AbstractStemmerLemmatizer, DefaultLemmatizer, EnglishLemmatizer, LancasterStemmerLemmatizer, PorterStemmerLemmatizer, RuleBasedLemmatizer

public interface Lemmatizer

Interface for a Lemmatizer.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	cantLemmatize(java.lang.String spelling) Check for words that cannot be lemmatized.
int	countLemmata(java.lang.String lemma) Get number of lemmata comprising this lemma.
java.lang.String	getLemmaSeparator() Get the lemma separator string,
boolean	isCompoundLemma(java.lang.String lemma) Check if lemma is compound lemma.
java.lang.String	joinLemmata(java.lang.String[] lemmata) Join separate lemmata into a compound lemma.
java.lang.String	joinLemmata(java.lang.String[] lemmata, java.lang.String separator) Join separate lemmata into a compound lemma.
java.lang.String	lemmatize(java.lang.String spelling) Returns a lemma given a spelling.
java.lang.String	lemmatize(java.lang.String spelling, java.lang.String wordClass) Returns a lemma given a spelling and a part of speech.
void	setDictionary(java.util.Set<java.lang.String> dictionary) Set the dictionary for checking lemmata.
void	setLexicon(Lexicon lexicon) Set the lexicon which may provide lemmata.
java.lang.String[]	splitLemma(java.lang.String lemma) Split compound lemma into separate lemmata.

Method Detail

setLexicon

void setLexicon(Lexicon lexicon)

Set the lexicon which may provide lemmata.

Parameters:

lexicon - The lexicon.

setDictionary

void setDictionary(java.util.Set<java.lang.String> dictionary)

Set the dictionary for checking lemmata.

Parameters:

dictionary - The dictionary as a string set. May be null.

lemmatize

java.lang.String lemmatize(java.lang.String spelling)

Returns a lemma given a spelling.

Parameters:

spelling - The spelling.

Returns:

The lemma. "*" is returned if the lemma cannot be found.

lemmatize

java.lang.String lemmatize(java.lang.String spelling,
                         java.lang.String wordClass)

Returns a lemma given a spelling and a part of speech.

Parameters:

spelling - The spelling.

wordClass - The word class.

Returns:

The lemma. "*" is returned if the lemma cannot be found.

The word class should be a major word class as defined in PartOfSpeech.

cantLemmatize

boolean cantLemmatize(java.lang.String spelling)

Check for words that cannot be lemmatized.

Parameters:

spelling - The spelling to be lemmatized.

Returns:

true if spelling is not a lemmatizable word -- e.g., it contains punctuation, is a number, or is a Roman numeral.

getLemmaSeparator

java.lang.String getLemmaSeparator()

Get the lemma separator string,

Returns:

String to separate lemmata in compound lemma.

joinLemmata

java.lang.String joinLemmata(java.lang.String[] lemmata,
                           java.lang.String separator)

Join separate lemmata into a compound lemma.

Parameters:

lemmata - String array of lemmata.

separator - String to separate lemmata.

Returns:

String containing joined lemmata. The lemmata are separated by the specified separator character.

joinLemmata

java.lang.String joinLemmata(java.lang.String[] lemmata)

Join separate lemmata into a compound lemma.

Parameters:

lemmata - String array of part of speech lemmas.

Returns:

String containing joined lemmata. The lemmata are separated by the default separator character.

splitLemma

java.lang.String[] splitLemma(java.lang.String lemma)

Split compound lemma into separate lemmata.

Parameters:

lemma - The compound lemma.

Returns:

String array of lemmata. Only one entry if lemma is not a compound lemma.

isCompoundLemma

boolean isCompoundLemma(java.lang.String lemma)

Check if lemma is compound lemma.

Parameters:

lemma - The lemma.

Returns:

true if lemma is compound lemma.

countLemmata

int countLemmata(java.lang.String lemma)

Get number of lemmata comprising this lemma.

Parameters:

lemma - The lemma.

Returns:

Count of individual lemmata comprising this lemma.