gate.creole.annic.lucene

Class LuceneSearchThread

java.lang.Object

gate.creole.annic.lucene.LuceneSearchThread

public class LuceneSearchThread
extends Object

Given a boolean query, it is translated into one or more AND normalized queries. For example: (A|B)C is translated into AC and BC. For each such query an instance of LuceneSearchThread is created. Here, each query is issued separately and results are submitted to main instance of LuceneSearch.

Author:

niraj

Field Summary

Fields

Modifier and Type	Field and Description
boolean	finished Indicates if searching process is finished.

Constructor Summary

Constructors

Constructor and Description
LuceneSearchThread()

Method Summary

Modifier and Type	Method and Description
String	getQuery() Gets the query.
List<Pattern>	next(int numberOfResults) This method returns a list containing instances of Pattern
boolean	search(String query, int patternWindow, String indexLocation, String corpusToSearchIn, String annotationSetToSearchIn, LuceneSearcher luceneSearcher) This method collects the necessary information from lucene and uses it when the next method is called

Methods inherited from class java.lang.Object

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

Field Detail

finished

public boolean finished

Indicates if searching process is finished.

Constructor Detail

LuceneSearchThread

public LuceneSearchThread()

Method Detail

search

public boolean search(String query,
                      int patternWindow,
                      String indexLocation,
                      String corpusToSearchIn,
                      String annotationSetToSearchIn,
                      LuceneSearcher luceneSearcher)
               throws SearchException

This method collects the necessary information from lucene and uses it when the next method is called

Parameters:

query - query supplied by the user

patternWindow - number of tokens to refer on left and right context

indexLocation - location of the index the searcher should search in

luceneSearcher - an instance of lucene search from where the instance of SearchThread is invoked

Returns:

true iff search was successful false otherwise

Throws:

SearchException

next

public List<Pattern> next(int numberOfResults)
                   throws Exception

This method returns a list containing instances of Pattern

Parameters:

numberOfResults - the number of results to fetch

Returns:

a list of QueryResult

Throws:

Exception

getQuery

public String getQuery()

Gets the query.