LIST C

Listing C

/*

 * Created on Jun 19, 2003

 *

 * @author Jeff Linwood, jeff@greenninja.com

 *

 */

package com.greenninja.lucene;

 

import java.io.IOException;

import java.util.Collection;

import java.util.Iterator;

 

import org.apache.lucene.analysis.Analyzer;

import org.apache.lucene.analysis.standard.StandardAnalyzer;

import org.apache.lucene.document.Document;

import org.apache.lucene.document.Field;

import org.apache.lucene.index.IndexWriter;

 

 

public class Indexer

{

 

      protected IndexWriter writer = null;

      protected Analyzer analyzer = new StandardAnalyzer();

      public void init(String indexPath) throws IOException

      {

             //create a new index every time this is run

             writer = new IndexWriter(indexPath, analyzer, true);

      }

      public void buildIndex() throws IOException

      {

             //get the products from the DAO

             ProductDAO dao = new ProductDAO();

             dao.init();

             Collection products = dao.getAllProducts();

             Iterator iter = products.iterator();

             while (iter.hasNext())

             {

                    Product product = (Product) iter.next();

                    // convert the product to a document.

                    Document doc = new Document();

                    // create an unindexed, untokenized, stored field for the product id

                    doc.add(Field.UnIndexed("productId",product.getId()));

                    // create an indexed, untokenized, stored field for the name

                    doc.add(Field.Keyword("name",product.getName()));

                    // create an indexed, untokenized, stored field for the short description

                   doc.add(Field.Keyword("short",product.getShortDescription()));

                    // create an indexed, tokenized, unstored field for all of the content

                   String content = product.getName() + " " + product.getShortDescription() +

                          " " + product.getLongDescription();

                    doc.add(Field.Text("content",content));

                    // add the document to the index

                    try

                    {

                          writer.addDocument(doc);

                          System.out.println("Document " + product.getName() + " added to index.");

                    }

                    catch (IOException e)

                    {

                          System.out.println("Error adding document: " + e.getMessage());

                    }

             }

             //optimize the index

             writer.optimize();

             //close the index

             writer.close();     

 

      }

}