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From: Michael McCandless <lucene@mikemccandless.com>
To: java-user@lucene.apache.org
In-Reply-To: <b4fc2ad80812160241q779af57x18440db0cd790dff@mail.gmail.com>
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Subject: Re: Lucene in Action book. Problems with first example
Date: Tue, 16 Dec 2008 05:49:24 -0500
References: <b4fc2ad80812160241q779af57x18440db0cd790dff@mail.gmail.com>


Lucene in Action is based on the 1.4.x release of Lucene, which is  
quite old by now and unfortunately some of the APIs have since been  
removed.

We are working on the 2nd edition to fix this, but in the mean-time  
you need to migrate to the new APIs when you see the errors.

Eg, if you look in the 1.9 javadocs for Field, it will tell you what  
new API to use instead of Field.Keyword, Field.Text, etc:

   http://lucene.apache.org/java/1_9_1/api/org/apache/lucene/document/Field.html

Mike

Oleg Oltar wrote:

> Hi!
> I am starting to learn Lucene.
> I am using Lucene in Action book for startup (It was recommended to  
> me). I
> tried to compile first example from that book, but my ide (I use  
> eclipse,
> shows there are some errors in my code). I am just the beginner  
> here, and I
> really need to compile at least few programs.... before I can solve  
> problems
> myself. So I decided to post here the whole code with my comments.  
> Please
> help me!!!
>
>
> package org.main;
>
>
> import java.io.File;
>
> import java.io.FileReader;
>
> import java.io.IOException;
>
> import java.util.Date;
>
>
> 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 SimpleIndexer {
>
> /**
>
> * @param args
>
> */
>
> public static void main(String[] args) throws Exception{
>
> if (args.length !=2){
>
> throw new Exception("Usage: java" + SimpleIndexer.class.getName() +  
> "<indexDir>
> <dataDir>");
>
> }
>
>
> File indexDir = new File(args[0]);
>
> File dataDir = new File(args[1]);
>
> long start = new Date().getTime();
>
> int numIndexed = index(indexDir, dataDir);
>
> long end = new Date().getTime();
>
> System.out.println("Indexing " + numIndexed +" took " + (end -  
> start) +
> "milliseconds");
>
> }
>
>
> @SuppressWarnings("deprecation")
>
> public static int index(File indexDir, File dataDir) throws  
> IOException {
>
>
>
> if (!dataDir.exists() || !dataDir.isDirectory()){
>
> throw new IOException(dataDir + " doesn't exist or not a directory");
>
>
>
> }
>
> IndexWriter writer = new IndexWriter(indexDir, new  
> StandardAnalyzer(), true);
> // Not sure why eclipse crosses this
>
> writer.setUseCompoundFile(false);
>
>
>
> indexDirectory(writer, dataDir);
>
> int numIndexed = writer.docCount(); // Not sure why eclipse crosses  
> this
>
> writer.optimize();
>
> writer.close();
>
>
>
>
>
> return numIndexed;
>
> }
>
>
> private static void indexDirectory(IndexWriter writer, File dir)
> throwsIOException{
>
> 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);
>
> }
>
> }
>
> }
>
>
> private static void indexFile(IndexWriter writer, File f)  
> throwsIOException{
>
> 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))); // Eclipse says:  
> The
> method Text(String, FileReader) is undefined for the type Field
>
> doc.add(Field.Keyword("filename", f.getCanonicalPath())); // Eclipse  
> says:The
> method Keyword(String, String) is undefined for the type Field
>
> writer.addDocument(doc);
>
> }
>
>
>
>
>
> }
>
> Please explain me why these errors are shown, and how to fix them.  
> Maybe,
> the version of lucene used by author of the book, contained needed  
> methods?
> So may it be that the book is outdated and can't be used for  
> learning. If
> so, please recommend me something that can help me to start with  
> lucene.
>
> Thanks in advance,
> Oleg


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