Re: database search using Lucene

From:
 Manish Pandit <pandit.manish@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 20 Aug 2007 12:53:23 -0700
Message-ID:
<1187639603.388890.242670@r29g2000hsg.googlegroups.com>
On Aug 20, 12:30 pm, Amit Jain <amitatgro...@gmail.com> wrote:

Hi,

I am getting compile time error symbol not found on line
doc.add(Field.Text("contents", new FileReader(f)));
doc.add(Field.Keyword("filename", f.getCanonicalPath()));
of method indexFile(IndexWriter writer, File f)

when i look into class Field i didn't found any thing about Text and
Keyword symbol.

what i have to do to resolve above compile time error...

/**
 *
 */

import java.sql.*;
import java.io.*;
import org.apache.lucene.index.*;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Field.*;

/**
 * @author apurohit
 *
 */
/**
* This code was originally written for
* Erik's Lucene intro java.net article
*/
public class FileIndex {
    public static void main(String[] args) throws Exception {

        File indexDir = new File("fileindex");
        File dataDir = new File("txt_file");

        int numIndexed = index(indexDir, dataDir);

    }

    // open an index and start file directory traversal
    public static int index(File indexDir, File dataDir)throws
IOException {
        //Listing 1.1 Indexer: traverses a file system and
indexes .txt files
        //Create Lucene index in this directory Index files in this
directory
        //Lucene in action: a sample application 13
        if (!dataDir.exists() || !dataDir.isDirectory()) {
           throw new IOException(dataDir+ " does not exist or is not a
directory");
        }
        IndexWriter writer = new IndexWriter(indexDir,new
StandardAnalyzer(), true);
        writer.setUseCompoundFile(false);
        indexDirectory(writer, dataDir);
        int numIndexed = writer.docCount();
        writer.optimize();
        writer.close();
        return numIndexed;
    }

    // recursive method that calls itself when it finds a directory
    private static void indexDirectory(IndexWriter writer, File
dir)throws IOException {
        File[] files = dir.listFiles();
        for (int i = 0; i < files.length; i++) {
            File f = files[i];
            if (f.isDirectory()) {
               indexDirectory(writer, f);
            } else if (f.getName().endsWith(".txt")) {
              indexFile(writer, f);
            }
        }
    }

    // method to actually index a file using Lucene
    private static void indexFile(IndexWriter writer, File f)throws
IOException {
        if (f.isHidden() || !f.exists() || !f.canRead()) {
           return;
        }
        System.out.println("Indexing " + f.getCanonicalPath());
        Document doc = new Document();
        doc.add(Field.Text("contents", new FileReader(f)));
        doc.add(Field.Keyword("filename", f.getCanonicalPath()));

        writer.addDocument(doc);
    }

}

Thanks...


You are using an older API on a newer version of lucene (2.2). There
is no Field.Keyword and Field.Text anymore. This has been replaced
with Field.Index, Field.Store and Field.TermVector APIs in newer
lucene. Look for examples to upgrade to new API, or download an older
lucene (1.4.x).

-cheers,
Manish

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