[minta saran] Lucene Indexing

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[minta saran] Lucene Indexing

derlaz

26-06-2011 08:03

[minta saran] Lucene Indexing

agan-agan para master. nih ane buat coding-an buat indexing pake library Lucene. an dapet coding ini dari buku Lucene in Action 2nd edition and udah gw modif. mau minta saran dan masukan dari para agan-agan biar index yang dhasilkan tambah sip emoticon-Blue Guy Smile (S)

Spoiler for coding:

PHP Code:


import java.io.File;
import java.io.FileFilter;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.util.Set;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.id.IndonesianAnalyzer;
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;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.SimpleFSDirectory;
import org.apache.lucene.util.Version;
import org.stjhi.model.TagReader;

public class Indexer {
	private String indexDir = "E:IRindexLucene3";
	private String dataDir = "E:IRcorpus";
    private IndexWriter writer;
	
    public Indexer(){
    	
    }
    
    public Indexer(String indexDir, String dataDir){
    	this.indexDir = indexDir;
    	this.dataDir = dataDir;
    }
    
	public Indexer(String indexDir) throws IOException{
		File file = new File(indexDir);
		Directory dir = FSDirectory.open(file);
		writer = new IndexWriter(dir,
				 	new IndonesianAnalyzer(Version.LUCENE_CURRENT),
				 	true,
				 	IndexWriter.MaxFieldLength.UNLIMITED);
	}
	
	public void close() throws IOException{
		writer.close();
	}
	
	public int index(String dataDir, FileFilter filter) throws Exception{
		
		File[] files = new File(dataDir).listFiles();
		
		for(File f: files){
			if(!f.isDirectory() && 
					!f.isHidden() && 
					f.exists() &&
					f.canRead() &&
					(filter == null || filter.accept(f))){
				indexFile(f);
			}
		}
		return writer.numDocs();
	}
	
	private void indexFile(File f) throws Exception{
		System.out.println("Indexing "+f.getCanonicalPath());
		Document doc = getDocument(f);
		writer.addDocument(doc); //add document to Lucene's index
	}
	
	protected Document getDocument(File f) throws Exception{
		Document doc = new Document();
		TagReader tag = new TagReader(f);
		tag.tagReader(f);
		doc.add(new Field("filename", 
				f.getName(),
				Field.Store.YES,
				Field.Index.NOT_ANALYZED));
		
		doc.add(new Field("fullpath",
				f.getCanonicalPath(),
				Field.Store.YES,
				Field.Index.NOT_ANALYZED));
		
		doc.add(new Field("title", 
				tag.getTitle(),
				Field.Store.YES, 
				Field.Index.NOT_ANALYZED));
		
		doc.add(new Field("content", 
				tag.getText(),
				Field.Store.YES, 
				Field.Index.ANALYZED));
		
		doc.add(new Field("source", 
				tag.getSource(),
				Field.Store.YES, 
				Field.Index.NOT_ANALYZED));
		//doc.add(new Field("contents", new FileReader(f)));
		return doc;
	}
	
	public static void main(String[] args) throws Exception{		
		long start = System.currentTimeMillis();
		Indexer indexer = new Indexer(new Indexer().indexDir);
		int numIndex;
		
		try{
			numIndex = indexer.index(new Indexer().dataDir, new TextFilesFilter());
		} finally {
			indexer.close();
		}
		
		long end = System.currentTimeMillis();
		
		System.out.print("Indexing "+numIndex+" files took "+(end-start) +" ms");
	
	private static class TextFilesFilter implements FileFilter {
		public boolean accept(File path) {
			return path.getName().toLowerCase().endsWith(".txt");
		}
	}
}

thanks before

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