Hi, sorry I want to know a java method or a procedure to load some indexes of
documents already created in a directory on the desktop. I saw a method
named FSDirectoty but I don't know how it works! I proceeded in this way,
but the compiler returns an NaN (Not a Number) Exception... what I did I do
wrong? This is the sorce code I wrote, please look at it. Thank you very
much and sorry for my english, I'm italian!
package it.unibas.ricerca.controllo;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.AbstractAction;
import javax.swing.KeyStroke;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.Similarity;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
//RICERCA
public class AzioneCerca2 extends AbstractAction{
private Controllo controllo;
private Similarity similarity;
private File file_for_index;
public AzioneCerca2(Controllo controllo){
this.controllo=controllo;
this.putValue(NAME, "search file");
this.putValue(SHORT_DESCRIPTION, "RICERCA DI DOCUMENTI");
this.putValue(MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
this.putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke("ctrl A")); //
o alt A
}
private static final int MAX_HITS = 10;
private static final String FIELD = "frase";
public void actionPerformed(ActionEvent e) {
// Effettua le inizializzazioni...
Analyzer analyzer = new MyAnalyzer();
Directory directory = null;
try {
directory = FSDirectory.open(new
File("../../indici/index_Scenari_usecases"));
} catch (IOException ex) {
Logger.getLogger(AzioneCerca2.class.getName()).log(Level.SEVERE,
null, ex);
}
try {
effettuaRicerca("Inserimento anagrafica laboratorio", MAX_HITS,
analyzer, directory);
} catch (ParseException ex) {
Logger.getLogger(AzioneCerca2.class.getName()).log(Level.SEVERE,
null, ex);
} catch (CorruptIndexException ex) {
Logger.getLogger(AzioneCerca2.class.getName()).log(Level.SEVERE,
null, ex);
} catch (IOException ex) {
Logger.getLogger(AzioneCerca2.class.getName()).log(Level.SEVERE,
null, ex);
}
}
private static void effettuaRicerca(String queryString, int maxHits,
Analyzer analyzer, Directory directory) throws ParseException,
CorruptIndexException, IOException,
org.apache.lucene.queryParser.ParseException {
// Crea la QUERY...
QueryParser parser = new QueryParser(Version.LUCENE_34, FIELD,
analyzer);
Query query = parser.parse(queryString);
// ...la esegue...
IndexSearcher indexSearcher = new IndexSearcher(directory);
TopDocs results = indexSearcher.search(query, maxHits);
System.out.println("\nSearching '" + queryString + "'.");
System.out.println("Found #" + results.totalHits + " items (" +
results.getMaxScore() + ")");
// ...e, infine, stampa i risultati.
ScoreDoc[] hits = results.scoreDocs;
for (int i = 0; i < hits.length; i++) {
Document hitDocIS = indexSearcher.doc(hits[i].doc);
String foundSentence = hitDocIS.get(FIELD);
System.out.println(hits[i].doc + "# (" + hits[i].score + ") - " +
foundSentence);
}
indexSearcher.close();
}
}
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