Indexer.java

package test;

import java.io.File;
import java.io.FileFilter;
import java.io.FileReader;
import java.io.IOException;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;


public class Indexer {
    private IndexWriter writer;

    public Indexer(String indexDirectoryPath) throws IOException {
        Directory indexDirectory = FSDirectory.open(new File(indexDirectoryPath));
        writer = new IndexWriter(indexDirectory, new StandardAnalyzer(Version.LUCENE_36), true, IndexWriter.MaxFieldLength.UNLIMITED);
    }

    public void close() throws CorruptIndexException, IOException{
        writer.close();
    }

    private Document getDocument(File file) throws IOException{
        Document document = new Document();
        Field contentField = new Field(LuceneConstants.CONTENTS, new FileReader(file));
        Field fileNameField = new Field(LuceneConstants.FILE_NAME, file.getName(), Field.Store.YES,Field.Index.NOT_ANALYZED);
        Field filePathField = new Field(LuceneConstants.FILE_PATH, file.getCanonicalPath(),Field.Store.YES, Field.Index.NOT_ANALYZED);

        document.add(contentField);
        document.add(fileNameField);
        document.add(filePathField);
        return document;
    }

    private void indexFile(File file) throws IOException{
        System.out.println("Indeksuje " + file.getCanonicalPath());
        Document document = getDocument(file);
        writer.addDocument(document);
    }

    public int createIndex(String dataDirPath, FileFilter filter) throws IOException {
        File[] files = new File(dataDirPath).listFiles();
        for(File file : files){
            if(!file.isDirectory() && !file.isHidden() && file.exists() && file.canRead() && filter.accept(file)){
                indexFile(file);
            }
        }
        return writer.numDocs();
    }
}