org.apache.ctakes.utils.wiki

Class WikiIndex

java.lang.Object

org.apache.ctakes.utils.wiki.WikiIndex

public class WikiIndex
extends Object

A wrapper for a wikipedia lucene index.

Author:

dmitriy dligach

Field Summary

Fields

Modifier and Type	Field and Description
static String	defaultIndexPath
static int	defaultMaxHits
static String	defaultSearchField

Constructor Summary

Constructors

Constructor and Description
WikiIndex()
WikiIndex(int maxHits, String indexPath, String searchField)
WikiIndex(int maxHits, String indexPath, String searchField, boolean approximate)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
double	getCosineSimilarity(String queryText1, String queryText2) Send two queries to the index.
ArrayList<org.apache.lucene.index.Terms>	getTermFreqVectors(String queryString)
void	initialize()
ArrayList<SearchResult>	search(String queryText) Search the index.

Methods inherited from class java.lang.Object

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

Field Detail

defaultMaxHits

public static int defaultMaxHits

defaultIndexPath

public static String defaultIndexPath

defaultSearchField

public static String defaultSearchField

Constructor Detail

WikiIndex

public WikiIndex(int maxHits,
         String indexPath,
         String searchField,
         boolean approximate)

WikiIndex

public WikiIndex(int maxHits,
         String indexPath,
         String searchField)

WikiIndex

public WikiIndex()

Method Detail

initialize

public void initialize()
                throws org.apache.lucene.index.CorruptIndexException,
                       IOException

Throws:

org.apache.lucene.index.CorruptIndexException

IOException

search

public ArrayList<SearchResult> search(String queryText)
                               throws org.apache.lucene.queryparser.classic.ParseException,
                                      IOException

Search the index. Return a list of article titles and their scores.

Throws:

org.apache.lucene.queryparser.classic.ParseException

IOException

getCosineSimilarity

public double getCosineSimilarity(String queryText1,
                         String queryText2)
                           throws org.apache.lucene.queryparser.classic.ParseException,
                                  IOException

Send two queries to the index. For each query, form a tfidf vector that represents N top matching documents. Return cosine similarity between the two tfidf vectors.

Throws:

org.apache.lucene.queryparser.classic.ParseException

IOException

getTermFreqVectors

public ArrayList<org.apache.lucene.index.Terms> getTermFreqVectors(String queryString)
                                                            throws org.apache.lucene.queryparser.classic.ParseException,
                                                                   IOException

Throws:

org.apache.lucene.queryparser.classic.ParseException

IOException

close

public void close()
           throws IOException

Throws:

IOException