johannes at johannet
Jul 23, 2008, 3:18 PM
Post #2 of 2
(153 views)
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Hello,
i found my mistake.
i forgot to add the files path to the document.
greetings
Johannes Dorn
Am 23.07.2008 um 23:14 schrieb Johannes Dorn:
> Hello,
> I am quite new to Lucene.
> I've added a search to my application by combining the getting
> started application and the xml#1 contribution.
>
> Here are the methods used to generate the index.
>
> public static void generateIndex() {
> try {
> if (!docDir.exists() || !docDir.canRead()) {
> System.out.println("Document directory '"
> +docDir.getAbsolutePath()+ "' does not exist or is not readable,
> please check the path");
> System.exit(1);
> }
> IndexWriter writer = new IndexWriter(INDEX_DIR, new
> StandardAnalyzer(), true);
> indexDocs(writer, docDir);
> writer.optimize();
> writer.close();
> } catch (IOException e) {
> System.out.println(e.getMessage());
> }
> }
>
> private static void indexDocs(IndexWriter writer, File file) throws
> IOException {
> if (file.canRead()) {
> if (!file.getName().substring(0, 1).equals(".")) {
> if (file.isDirectory() && file.equals(docDir)) {
> String[] files = file.list();
> if (files != null) {
> for (int i=0; i<files.length; i++) {
> indexDocs(writer, new File(file+"/"+files[i]));
> }
> }
> }
> else {
> try {
> saxParserFactory = SAXParserFactory.newInstance();
> saxParserFactory.setValidating(false);
> SAXParser saxParser = saxParserFactory.newSAXParser();
> xmlReader = saxParser.getXMLReader();
>
> transformerFactory = TransformerFactory.newInstance();
> Transformer transformer =
> transformerFactory.newTransformer(new
> StreamSource(xslFileSite.toURL().toString()));
> xmlIndexer = new XMLIndexer(writer,xmlReader,transformer);
> xmlIndexer.indexFile(file);
> }
> catch (Exception ex) {
> System.out.println(ex);
> }
> }
> }
> }
> }
>
> public void startElement(String namespaceURI, String localName,
> String rawName, Attributes atts)
> throws SAXException
> {
> if(rawName.equals("field") || rawName.equals("datefield"))
> {
> currentField = new FieldHolder();
> currentField.type = rawName;
> currentField.name = atts.getValue("name");
> currentField.value = new StringBuffer();
> currentField.store = atts.getValue("store").equals("true") ?
> true:false;
> currentField.index = atts.getValue("index").equals("true") ?
> true:false;
> currentField.token = atts.getValue("token").equals("true") ?
> true:false;
> inField = true;
> }
> }
>
> public void characters(char[] ch, int start, int length) throws
> SAXException
> {
> if(inField)
> {
> currentField.value.append(ch,start,length);
> }
> }
>
> public void endElement(java.lang.String namespaceURI,
> java.lang.String localName,
> java.lang.String qName)
> throws SAXException
> {
> fieldHolders.add(currentField);
> inField = false;
> }
>
> public void indexFile(File xmlFile) throws Exception
> {
> if(xmlFile.exists())
> {
> try
> {
> ByteArrayOutputStream byteOutputStream = new
> ByteArrayOutputStream((int)(xmlFile.length())*2);
> BufferedOutputStream bufferedOutputStream = new
> BufferedOutputStream(byteOutputStream);
> StreamResult streamResult = new
> StreamResult(bufferedOutputStream);
>
> FileInputStream fileInputStream = new FileInputStream(xmlFile);
> StreamSource streamSource = new StreamSource(new
> BufferedInputStream(fileInputStream));
> transformer.transform(streamSource,streamResult);
> BufferedInputStream inputStream = new BufferedInputStream(new
> ByteArrayInputStream(byteOutputStream.toByteArray()));
> xmlReader.parse(new InputSource(inputStream));
>
> Document doc = new Document();
> for(int i=0; i<2; i++)
> {
> FieldHolder fieldHolder = (FieldHolder)(fieldHolders.get(i));
>
> //Modified by Johannes Dorn
> Field.Store store = Field.Store.YES;
> if (fieldHolder.store == false)
> store = Field.Store.NO;
>
> Field.Index index = Field.Index.NO;
> if (fieldHolder.index) {
> if (fieldHolder.token)
> index = Field.Index.TOKENIZED;
> else
> index = Field.Index.UN_TOKENIZED;
> }
>
> // if(!fieldHolder.value.toString().trim().equals(""))
> doc.add(new
> Field(fieldHolder.name,fieldHolder.value.toString(),store,index));
> //End of Modifications
> }
> writer.addDocument(doc);
> }
> catch (Exception exception)
> {
> transformer.clearParameters();
> //put log messages here
> }
> }
> else
> {
> //put log messages here
> }
> }
>
> And now the search:
>
> public static Vector<String> search(String searchText) throws
> Exception {
> Vector<String> result = new Vector<String>();
> String index = "index";
> String defaultField = "text";
>
> IndexReader reader = IndexReader.open(index);
> Searcher searcher = new IndexSearcher(reader);
> Analyzer analyzer = new StandardAnalyzer();
>
> QueryParser parser = new QueryParser(defaultField, analyzer);
>
> Query query = parser.parse(searchText);
>
> Hits hits = searcher.search(query);
> for (int i = 0; i < hits.length(); i++) {
> Document doc = hits.doc(i);
> String path = doc.get("path");
> if (path != null) {
> String title = path;
> int pos = title.indexOf("/");
> title = title.substring(pos+1);
> pos = title.indexOf("/");
> title = title.substring(pos+1);
> if (title != null) {
> result.add(title);
> }
> } else {
> }
> }
> reader.close();
> searcher.close();
> return result;
> }
>
>
> Right now, I only index and search two files.
> If i search for a word, that is in either of these files, hits has
> three docs, all of whice are null.
>
> What am i doing wrong here?
>
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