org.apache.lucene.index

Class IndexSorter

java.lang.Object

org.apache.lucene.index.IndexSorter

public class IndexSorter
extends Object

Sort an index by document importance factor. Higher scoring documents are assigned smaller document numbers. Document weights are obtained from a specified field, which has to be single-valued and stored, with string value that represents a float number. Stored fields in the output index remain consistent, i.e. both stored fields and postings are renumbered in sync.

NOTE: this tool is unaware of documents added atomically via IndexWriter.addDocuments(java.util.Collection<org.apache.lucene.document.Document>) or IndexWriter.updateDocuments(org.apache.lucene.index.Term, java.util.Collection<org.apache.lucene.document.Document>), which means it can easily break up such document groups.

Constructor Summary

Constructors

Constructor and Description
IndexSorter()

Method Summary

Methods

Modifier and Type	Method and Description
static void	main(String[] args)
void	sort(Directory input, Directory output, String field)

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexSorter

public IndexSorter()

Method Detail

sort

public void sort(Directory input,
        Directory output,
        String field)
          throws IOException

Throws:

IOException

main

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

Throws:

Exception