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From "Nader S. Henein" <...@bayt.net>
Subject RE: Deleting documents from index question.
Date Mon, 17 Jun 2002 14:15:51 GMT
define incorrect .. a crash or a un-desired results

-----Original Message-----
From: Rick Vestal [mailto:rick@cat.utexas.edu]
Sent: Monday, June 17, 2002 6:10 PM
To: 'Lucene Users List'; nsh@bayt.net
Subject: RE: Deleting documents from index question.


I had tried this and it had the same incorrect result.

Thanks,

-- Rick

> -----Original Message-----
> From: Nader S. Henein [mailto:nsh@bayt.net]
> Sent: Monday, June 17, 2002 9:09 AM
> To: Lucene Users List
> Subject: RE: Deleting documents from index question.
>
>
> PS: try closing the reader after you're done deleating and
> open a new one for the search, kind a like commiting a
> transaction to a normal DB
>
> -----Original Message-----
> From: Rick Vestal [mailto:rick@cat.utexas.edu]
> Sent: Monday, June 17, 2002 5:34 PM
> To: lucene-user@jakarta.apache.org
> Subject: Deleting documents from index question.
>
>
> Good morning all,
>
> I'm trying to delete a set of documents from an index,
> and am running into a problem where all the documents are
> not deleted.  My problem is either the way I am using the API
> or it is a bug in lucene...I'm not sure which one it is.
>
> I've included a sample program here that shows the problem.
> Note that you will have to change the path at the top to a
> valid set of files on your machine.  If anybody has any ideas
> on why I am not removing the files correctly, please let me know.
>
> Thanks,
>
> -- Rick
>
> /*
>  * Created by IntelliJ IDEA.
>  * User: rvestal
>  * Date: Jun 16, 2002
>  * Time: 10:23:51 PM
>  * To change template for new class use
>  * Code Style | Class Templates options (Tools | IDE
> Options).  */ package org.intellij.plugins.docPlugin;
>
> import org.apache.lucene.analysis.Analyzer;
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.document.*;
> import org.apache.lucene.index.*;
> import org.apache.lucene.queryParser.QueryParser;
> import org.apache.lucene.search.*;
> import org.apache.lucene.store.*;
>
> import java.io.*;
> import java.util.Vector;
>
> public class IndexTest {
>
>     // path to ant 1.4.1 docs
>     private static String mDirToIndex =
> "c:/utils/ant/docs/manual/api/";
>
>     private static String INDEX_DIR = "indexTest";
>
>
>     static private void collectFiles( File dir, Vector files ) {
>         File[] children = dir.listFiles();
>         for ( int ix = 0; ix < children.length; ix++ ) {
>             File child = children[ix];
>             if ( child.isDirectory() ) {
>                 collectFiles( child, files );
>             } else {
>                 files.add( child );
>             }
>         }
>     }
>
>
>     public static void main( String[] args ) {
>         File indexDir = new File( INDEX_DIR );
>         if ( !indexDir.exists() ) {
>             indexDir.mkdirs();
>         }
>
>         Vector files = new Vector();
>         collectFiles( new File( mDirToIndex ), files );
>
>         try {
>             IndexWriter writer = new IndexWriter( INDEX_DIR,
> new StandardAnalyzer(), true );
>
>             for ( int ix = 0; ix < files.size(); ix++ ) {
>                 File file = ( File ) files.get( ix );
>                 writer.addDocument(
> IndexTestDocument.createDocument( file ) );
>             }
>             System.out.println( "Added: " + files.size() + "
> files." );
>
>             writer.optimize();
>             writer.close();
>             writer = null;
>
>             Searcher searcher = new IndexSearcher( INDEX_DIR );
>             Analyzer analyzer = new StandardAnalyzer();
>             Query query = QueryParser.parse( "Ant",
> "contents", analyzer );
>
>             Hits hits = searcher.search( query );
>             System.out.println( "Hits after add: " + hits.length() );
>             searcher.close();
>
>             Directory directory = FSDirectory.getDirectory(
> INDEX_DIR, false );
>             IndexReader reader = IndexReader.open( directory );
>
>             int count = 0;
>             for ( int ix = 0; ix < files.size(); ix++ ) {
>                 String path =
> IndexTestDocument.normalizePath( ( ( File
> )
> files.get( ix ) ).getAbsolutePath().replace( '\\', '/' ) );
>
>                 int numDocs = reader.numDocs();
>                 boolean bDeleted = false;
>                 for ( int ndx = 0; ndx < numDocs; ndx++ ) {
>                     if ( !reader.isDeleted( ndx ) ) {
>                         String docPath =
> IndexTestDocument.getPath( reader.document( ndx ) );
>                         if ( docPath.equals( path ) ) {
>                             count++;
>                             reader.delete( ndx );
>                             bDeleted = true;
>                             break;
>                         }
>                     }
>                 }
>                 if ( !bDeleted ) {
>                     System.out.println( "  Not Deleted: " + path );
>                     for( int ndx = 0; ndx < numDocs; ndx++ ) {
>                         if ( !reader.isDeleted( ndx ) ) {
>                             String docPath =
> IndexTestDocument.getPath( reader.document( ndx ) );
>                             System.out.println( "      path "
> + ndx + ":
> " +
> docPath );
>                         }
>                     }
>                 }
>             }
>             System.out.println( "Removed " + count + "
> documents of (" +
>
> files.size() + ")" );
>             reader.close();
>
>             searcher = new IndexSearcher( INDEX_DIR );
>             analyzer = new StandardAnalyzer();
>             query = QueryParser.parse( "Ant", "contents", analyzer );
>
>             hits = searcher.search( query );
>             System.out.println( "Hits after remove: " +
> hits.length() );
>
>         } catch ( Exception ex ) {
>             ex.printStackTrace();
>         }
>     }
>
>
>     static class IndexTestDocument {
>
>         static public Document createDocument( File f )
>             throws FileNotFoundException {
>             Document doc = new Document();
>             doc.add( Field.Text( "path", normalizePath(
> f.getPath() ) ) );
>             Reader reader = new BufferedReader( new
> InputStreamReader( new FileInputStream( f ) ) );
>             doc.add( Field.Text( "contents", reader ) );
>             return doc;
>         }
>
>
>         static public String getPath( Document doc ) {
>             return ( String ) doc.get( "path" );
>         }
>
>         static public String normalizePath( String path ) {
>             if ( path == null || path.length() == 0 ) {
>                 return "";
>             }
>             path = path.replace( '\\', '/' );
>             File f = new File( path );
>             if ( f.isDirectory() ) {
>                 if ( path.charAt( path.length() - 1 ) != '/' ) {
>                     path = path + "/";
>                 }
>             }
>             return path;
>         }
>     }
> }
>
>
>
> --
> Center for Agile Technology          phone: 512.232.4399
> The University of Texas at Austin    fax: 512.232.6413
> 3925 West Braker Lane                email: rick@cat.utexas.edu
> MCC Suite 3.11040 CAT                http://cat.utexas.edu/
> Austin, TX   78759-5316
>
>
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