morfologik.stemming

Class DictionaryLookup

java.lang.Object

morfologik.stemming.DictionaryLookup

All Implemented Interfaces:

java.lang.Iterable<WordData>, IStemmer

public final class DictionaryLookup
extends java.lang.Object
implements IStemmer, java.lang.Iterable<WordData>

This class implements a dictionary lookup of an inflected word over a dictionary previously compiled using the dict_compile tool.

Constructor Summary

Constructors

Constructor and Description
DictionaryLookup(Dictionary dictionary) Creates a new object of this class using the given FSA for word lookups and encoding for converting characters to bytes.

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	applyReplacements(java.lang.CharSequence word, java.util.LinkedHashMap<java.lang.String,java.lang.String> replacements) Apply partial string replacements from a given map.
Dictionary	getDictionary()
char	getSeparatorChar()
java.util.Iterator<WordData>	iterator() Return an iterator over all WordData entries available in the embedded Dictionary.
java.util.List<WordData>	lookup(java.lang.CharSequence word) Searches the automaton for a symbol sequence equal to word, followed by a separator.

Methods inherited from class java.lang.Object

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

Constructor Detail

DictionaryLookup

public DictionaryLookup(Dictionary dictionary)
                 throws java.lang.IllegalArgumentException

Creates a new object of this class using the given FSA for word lookups and encoding for converting characters to bytes.

Parameters:

dictionary - The dictionary to use for lookups.

Throws:

java.lang.IllegalArgumentException - if FSA's root node cannot be acquired (dictionary is empty).

Method Detail

lookup

public java.util.List<WordData> lookup(java.lang.CharSequence word)

Searches the automaton for a symbol sequence equal to word, followed by a separator. The result is a stem (decompressed accordingly to the dictionary's specification) and an optional tag data.

Specified by:

lookup in interface IStemmer

Parameters:

word - The word (typically inflected) to look up base forms for.

Returns:

A list of WordData entries (possibly empty).

applyReplacements

public static java.lang.String applyReplacements(java.lang.CharSequence word,
                                 java.util.LinkedHashMap<java.lang.String,java.lang.String> replacements)

Apply partial string replacements from a given map. Useful if the word needs to be normalized somehow (i.e., ligatures, apostrophes and such).

Parameters:

word - The word to apply replacements to.

replacements - A map of replacements (from->to).

Returns:

new string with all replacements applied.

iterator

public java.util.Iterator<WordData> iterator()

Return an iterator over all WordData entries available in the embedded Dictionary.

Specified by:

iterator in interface java.lang.Iterable<WordData>

getDictionary

public Dictionary getDictionary()

Returns:

Return the Dictionary used by this object.

getSeparatorChar

public char getSeparatorChar()

Returns:

Returns the logical separator character splitting inflected form, lemma correction token and a tag. Note that this character is a best-effort conversion from a byte in DictionaryMetadata.separator and may not be valid in the target encoding (although this is highly unlikely).