net.didion.jwnl.dictionary.morph

Class DefaultMorphologicalProcessor

java.lang.Object

net.didion.jwnl.dictionary.morph.DefaultMorphologicalProcessor

All Implemented Interfaces:

MorphologicalProcessor, Createable

public class DefaultMorphologicalProcessor
extends java.lang.Object
implements MorphologicalProcessor

Default implementation of MorphologicalProcessor. This isn't a true morpological analyzer (it doesn't figure out all the characteristics of each word it processes). This is basically a stemmer that uses WordNet exception files instead of complex stemming rules. It also tries to be intelligent by removing delimiters and doing concatanation.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	DefaultMorphologicalProcessor.LookupInfo

Field Summary

Fields

Modifier and Type	Field and Description
private Cache	_lookupCache
private Operation[]	_operations
static java.lang.String	CACHE_CAPACITY Parameter that determines the size of the base form cache
private static int	DEFAULT_CACHE_CAPACITY
static java.lang.String	OPERATIONS Parameter that determines the operations this morphological processor will perform

Constructor Summary

Constructors

Constructor and Description
DefaultMorphologicalProcessor()
DefaultMorphologicalProcessor(Operation[] operations)
DefaultMorphologicalProcessor(Operation[] operations, int cacheCapacity)

Method Summary

Modifier and Type	Method and Description
private void	cacheLookupInfo(POSKey key, DefaultMorphologicalProcessor.LookupInfo info)
java.lang.Object	create(java.util.Map params)
private DefaultMorphologicalProcessor.LookupInfo	getCachedLookupInfo(POSKey key)
java.util.List	lookupAllBaseForms(POS pos, java.lang.String derivation) Return all the base forms of derivation
IndexWord	lookupBaseForm(POS pos, java.lang.String derivation) Lookup the base form of a word.
private IndexWord	lookupNextBaseForm(POS pos, java.lang.String derivation, DefaultMorphologicalProcessor.LookupInfo info) Lookup the next base form of a pos/word pair.

Methods inherited from class java.lang.Object

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

Field Detail

CACHE_CAPACITY

public static final java.lang.String CACHE_CAPACITY

Parameter that determines the size of the base form cache

See Also:

Constant Field Values

OPERATIONS

public static final java.lang.String OPERATIONS

Parameter that determines the operations this morphological processor will perform

See Also:

Constant Field Values

DEFAULT_CACHE_CAPACITY

private static final int DEFAULT_CACHE_CAPACITY

See Also:

Constant Field Values

_lookupCache

private Cache _lookupCache

_operations

private Operation[] _operations

Constructor Detail

DefaultMorphologicalProcessor

public DefaultMorphologicalProcessor()

DefaultMorphologicalProcessor

public DefaultMorphologicalProcessor(Operation[] operations)

DefaultMorphologicalProcessor

public DefaultMorphologicalProcessor(Operation[] operations,
                                     int cacheCapacity)

Method Detail

create

public java.lang.Object create(java.util.Map params)
                        throws JWNLException

Specified by:

create in interface Createable

Throws:

JWNLException

lookupBaseForm

public IndexWord lookupBaseForm(POS pos,
                                java.lang.String derivation)
                         throws JWNLException

Lookup the base form of a word. Given a lemma, finds the WordNet entry most like that lemma. This function returns the first base form found. Subsequent calls to this function with the same part-of-speech and word will return the same base form. To find another base form for the pos/word, call lookupNextBaseForm.

Specified by:

lookupBaseForm in interface MorphologicalProcessor

Parameters:

pos - the part-of-speech of the word to look up

derivation - the word to look up

Returns:

IndexWord the IndexWord found during lookup

Throws:

JWNLException

cacheLookupInfo

private void cacheLookupInfo(POSKey key,
                             DefaultMorphologicalProcessor.LookupInfo info)

getCachedLookupInfo

private DefaultMorphologicalProcessor.LookupInfo getCachedLookupInfo(POSKey key)

lookupNextBaseForm

private IndexWord lookupNextBaseForm(POS pos,
                                     java.lang.String derivation,
                                     DefaultMorphologicalProcessor.LookupInfo info)
                              throws JWNLException

Lookup the next base form of a pos/word pair. If a base form has not yet been found for the pos/word, it will find the first base form, otherwise it will find the next base form.

Parameters:

pos - the part-of-speech of the word to look up

derivation - the word to look up

Returns:

IndexWord the IndexWord found during lookup, or null if an IndexWord is not found

Throws:

JWNLException

lookupAllBaseForms

public java.util.List lookupAllBaseForms(POS pos,
                                         java.lang.String derivation)
                                  throws JWNLException

Description copied from interface: MorphologicalProcessor

Return all the base forms of derivation

Specified by:

lookupAllBaseForms in interface MorphologicalProcessor

Throws:

JWNLException