org.apache.lucene.search
Class FuzzyTermEnum
public final class FuzzyTermEnum
Subclass of FilteredTermEnum for enumerating all terms that are similiar to the specified filter term.
Term enumerations are always ordered by Term.compareTo(). Each term in
the enumeration is greater than all that precede it.
FuzzyTermEnum(IndexReader reader, Term term) - Empty prefix and minSimilarity of 0.5f are used.
|
FuzzyTermEnum(IndexReader reader, Term term, float minSimilarity) - This is the standard FuzzyTermEnum with an empty prefix.
|
FuzzyTermEnum(IndexReader reader, Term term, float minSimilarity, int prefixLength) - Constructor for enumeration of all terms from specified
reader which share a prefix of
length prefixLength with term and which have a fuzzy similarity >
minSimilarity .
|
void | close()
|
protected float | difference()
|
boolean | endEnum()
|
protected boolean | termCompare(Term term) - The termCompare method in FuzzyTermEnum uses Levenshtein distance to
calculate the distance between the given term and the comparing term.
|
FuzzyTermEnum
public FuzzyTermEnum(IndexReader reader,
Term term,
float minSimilarity,
int prefixLength)
throws IOException
Constructor for enumeration of all terms from specified reader
which share a prefix of
length prefixLength
with term
and which have a fuzzy similarity >
minSimilarity
.
reader
- Delivers terms.term
- Pattern term.minSimilarity
- Minimum required similarity for terms from the reader. Default value is 0.5f.prefixLength
- Length of required common prefix. Default value is 0.
difference
protected final float difference()
- difference in interface FilteredTermEnum
termCompare
protected final boolean termCompare(Term term)
The termCompare method in FuzzyTermEnum uses Levenshtein distance to
calculate the distance between the given term and the comparing term.
- termCompare in interface FilteredTermEnum
Copyright © 2000-2005 Apache Software Foundation. All Rights Reserved.