org.apache.nutch.searcher
Class IndexSearcher

java.lang.Object
  org.apache.nutch.searcher.IndexSearcher

All Implemented Interfaces:

HitDetailer, Searcher

public class IndexSearcher

extends Object

implements Searcher, HitDetailer

Implements Searcher and HitDetailer for either a single merged index, or for a set of individual segment indexes.

Constructor Summary

IndexSearcher(File[] segmentDirs)
Construct given a number of indexed segments.

IndexSearcher(String index)
Construct given a directory containing fetched segments, and a separate directory naming their merged index.

Method Summary

HitDetails	getDetails(Hit hit) Returns the details for a hit document.
HitDetails[]	getDetails(Hit[] hits) Returns the details for a set of hits.
String	getExplanation(Query query, Hit hit) Return an HTML-formatted explanation of how a query scored.
Hits	search(Query query, int numHits, String dedupField, String sortField, boolean reverse) Return the top-scoring hits for a query.

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexSearcher

public IndexSearcher(File[] segmentDirs)
              throws IOException

Construct given a number of indexed segments.

IndexSearcher

public IndexSearcher(String index)
              throws IOException

Construct given a directory containing fetched segments, and a separate directory naming their merged index.

Method Detail

search

public Hits search(Query query,
                   int numHits,
                   String dedupField,
                   String sortField,
                   boolean reverse)
            throws IOException

Description copied from interface: Searcher

Return the top-scoring hits for a query.

Specified by:

search in interface Searcher

Throws:

IOException

getExplanation

public String getExplanation(Query query,
                             Hit hit)
                      throws IOException

Description copied from interface: Searcher

Return an HTML-formatted explanation of how a query scored.

Specified by:

getExplanation in interface Searcher

Throws:

IOException

getDetails

public HitDetails getDetails(Hit hit)
                      throws IOException

Description copied from interface: HitDetailer

Returns the details for a hit document.

Specified by:

getDetails in interface HitDetailer

Throws:

IOException

getDetails

public HitDetails[] getDetails(Hit[] hits)
                        throws IOException

Description copied from interface: HitDetailer

Returns the details for a set of hits. Hook for parallel IPC calls.

Specified by:

getDetails in interface HitDetailer

Throws:

IOException