Lucene PDF indexing

[sivalingam T]

Hi

I have written one files for PDF Indexing. Here I have written as follows ..  

This is my IndexPDF file.

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermEnum;

import org.pdfbox.searchengine.lucene.LucenePDFDocument;

import java.io.File;
import java.util.Date;
import java.util.Arrays;

class IndexPDF {
  private static boolean deleting = false;        // true during deletion pass
  private static IndexReader reader;              // existing index
  private static IndexWriter writer;              // new index being built
  private static TermEnum uidIter;                // document id iterator

  public static void main(String[] argv) {
    try {
      String index = "index";
      boolean create = false;
      File root = null;

      String usage = "IndexHTML [-create] [-index <index>] <root_directory>";

      if (argv.length == 0) {
        System.err.println("Usage: " + usage);
        return;
      }

      for (int i = 0; i < argv.length; i++) {
        if (argv[i].equals("-index")) {           // parse -index option
          index = argv[++i];
        } else if (argv[i].equals("-create")) {   // parse -create option
          create = true;
        } else if (i != argv.length-1) {
          System.err.println("Usage: " + usage);
          return;
        } else
          root = new File(argv[i]);
      }

      Date start = new Date();

      if (!create) {                              // delete stale docs
        deleting = true;
        indexDocs(root, index, create);
      }

      writer = new IndexWriter(index, new StandardAnalyzer(), create);
      writer.maxFieldLength = 1000000;

      indexDocs(root, index, create);             // add new docs

      System.out.println("Optimizing index...");
      writer.optimize();
      writer.close();

      Date end = new Date();

      System.out.print(end.getTime() - start.getTime());
      System.out.println(" total milliseconds");

    } catch (Exception e) {
      System.out.println(" caught a " + e.getClass() +
                         "\n with message: " + e.getMessage());
    }
  }

  /* Walk directory hierarchy in uid order, while keeping uid iterator from
  /* existing index in sync.  Mismatches indicate one of: (a) old documents to
  /* be deleted; (b) unchanged documents, to be left alone; or (c) new
  /* documents, to be indexed.
   */

  private static void indexDocs(File file, String index, boolean create)
       throws Exception {
    if (!create) {                                // incrementally update

      reader = IndexReader.open(index);           // open existing index
      uidIter = reader.terms(new Term("uid", "")); // init uid iterator

      indexDocs(file);

      if (deleting) {                             // delete rest of stale docs
        while (uidIter.term() != null && uidIter.term().field() == "uid") {
          System.out.println("deleting " +
                             HTMLDocument.uid2url(uidIter.term().text()));
          reader.delete(uidIter.term());
          uidIter.next();
        }
        deleting = false;
      }

      uidIter.close();                            // close uid iterator
      reader.close();                             // close existing index

    } else                                        // don't have exisiting
      indexDocs(file);
  }

  private static void indexDocs(File file) throws Exception
  {
    if (file.isDirectory())
        {                         // if a directory
      String[] files = file.list();               // list its files
      Arrays.sort(files);                         // sort the files
      for (int i = 0; i < files.length; i++)
                {  // recursively index them
        indexDocs(new File(file, files[i]));
                }

    } 
        if ((file.getPath().endsWith(".pdf" )) || (file.getPath().endsWith(".PDF" )))
     {
            System.out.println( "Indexing PDF document: " + file );
            try
                        {
                        //Document doc = LucenePDFDocument.getDocument( file );
            writer.addDocument(LucenePDFDocument.getDocument( file));
                        }
                        catch(Exception e)
                        {}
     }
         
  }
  
}

when i use the following commands, the exceptions are thrown if anybody know please 
inform me.


C:\>java org.apache.lucene.demo.IndexPDF -create -index c:\lucene\pdf c:\pdfs\Words.pdf

Indexing PDF document: c:\pdfs\Words.pdf
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Cate
gory
        at org.pdfbox.searchengine.lucene.LucenePDFDocument.addContent(LucenePDF
Document.java:197)
        at org.pdfbox.searchengine.lucene.LucenePDFDocument.getDocument(LucenePD
FDocument.java:118)
        at org.apache.lucene.demo.IndexPDF.indexDocs(Unknown Source)
        at org.apache.lucene.demo.IndexPDF.indexDocs(Unknown Source)
        at org.apache.lucene.demo.IndexPDF.main(Unknown Source)



Thanks.




With Warm Regards,
Sivalingam.T

Sai Eswar Innovations (P) Ltd,
Chennai-92