Package 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

Constructors

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

Method Summary

Modifier and Type	Method	Description
final InputIterator	getEntryIterator()	Returns an iterator over all the entries

Methods inherited from class java.lang.Object

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

Constructor Details

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 Details

getEntryIterator

public final InputIterator getEntryIterator()
                                     throws IOException

Description copied from interface: Dictionary

Returns an iterator over all the entries

Specified by:

getEntryIterator in interface Dictionary

Returns:

Iterator

Throws:

IOException