org.apache.lucene.search.spell
Class HighFrequencyDictionary

java.lang.Object
  org.apache.lucene.search.spell.HighFrequencyDictionary

All Implemented Interfaces:

Dictionary

public class HighFrequencyDictionary
extends Object
implements Dictionary

HighFrequencyDictionary: terms taken from the given field of a Lucene index, which appear in a number of documents above a given threshold. Threshold is a value in [0..1] representing the minimum number of documents (of the total) where a term should appear. Based on LuceneDictionary.

Constructor Summary

HighFrequencyDictionary(IndexReader reader, String field, float thresh)
Creates a new Dictionary, pulling source terms from the specified field in the provided reader.

Method Summary

BytesRefIterator

getWordsIterator() Return all words present in the dictionary

Methods inherited from class java.lang.Object

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

Constructor Detail

HighFrequencyDictionary

public HighFrequencyDictionary(IndexReader reader,
                               String field,
                               float thresh)

Creates a new Dictionary, pulling source terms from the specified field in the provided reader.

Terms appearing in less than thresh percentage of documents will be excluded.

Method Detail

getWordsIterator

public final BytesRefIterator getWordsIterator()
                                        throws IOException

Description copied from interface: Dictionary

Return all words present in the dictionary

Specified by:

getWordsIterator in interface Dictionary

Returns:

Iterator

Throws:

IOException