Package org.apache.lucene.misc

Class HighFreqTerms

java.lang.Object

org.apache.lucene.misc.HighFreqTerms

public class HighFreqTerms
extends Object

HighFreqTerms class extracts the top n most frequent terms (by document frequency) from an existing Lucene index and reports their document frequency.

If the -t flag is given, both document frequency and total tf (total number of occurrences) are reported, ordered by descending total tf.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	HighFreqTerms.DocFreqComparator	Compares terms by docTermFreq
static class	HighFreqTerms.TotalTermFreqComparator	Compares terms by totalTermFreq

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_NUMTERMS

Constructor Summary

Constructors

Constructor	Description
HighFreqTerms()

Method Summary

Modifier and Type	Method	Description
static TermStats[]	getHighFreqTerms(IndexReader reader, int numTerms, String field, Comparator<TermStats> comparator)	Returns TermStats[] ordered by the specified comparator
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_NUMTERMS

public static final int DEFAULT_NUMTERMS

See Also:

Constant Field Values

Constructor Detail

HighFreqTerms

public HighFreqTerms()

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception

getHighFreqTerms

public static TermStats[] getHighFreqTerms(IndexReader reader,
                                           int numTerms,
                                           String field,
                                           Comparator<TermStats> comparator)
                                    throws Exception

Returns TermStats[] ordered by the specified comparator

Throws:

Exception