I verified that the index was correct using the app Luke, tested some
queries using it then replicated the results via code. It seems I need
to refine the token parsing but at least I have something now.
Ramon Casha
On 18 December 2012 15:50, Ramon Casha <rca...@gmail.com> wrote:
> Hmm ok I got something.
>
>
> Ramon Casha
>
>
> On 18 December 2012 15:44, Ramon Casha <rca...@gmail.com> wrote:
>> I converted them to TextField but the result is the same.
>>
>> doc.add(new TextField("text", text.toString(), Store.YES));
>>
>> The search always returns an empty array.
>>
>> Ramon Casha
>>
>>
>> On 18 December 2012 15:35, Jack Krupansky <j...@basetechnology.com> wrote:
>>> Maybe you wanted "text" fields that are analyzed and tokenized, as opposed
>>> to string fields which are not analyzed and stored and queried exactly
>>> as-is.
>>>
>>> See:
>>> http://lucene.apache.org/core/4_0_0/core/org/apache/lucene/document/TextField.html
>>>
>>> But, show us some of your indexed data and queries that fail.
>>>
>>> -- Jack Krupansky
>>>
>>> -----Original Message----- From: Ramon Casha
>>> Sent: Tuesday, December 18, 2012 9:14 AM
>>> To: java-user@lucene.apache.org
>>> Subject: Help needed: search is returning no results
>>>
>>>
>>> I have just downloaded and set up Lucene 4.0.0 to implement a search
>>> facility for a web app I'm developing.
>>>
>>> Creating the index seems to be successful - the files created contain
>>> the text that I'm indexing. However, search is returning no results.
>>> The code I'm using is fairly similar to the examples given.
>>>
>>> Here is the search code:
>>>
>>> private static final File index = new File("/tmp/naturopedia-index");
>>> private static final Version VERSION = Version.LUCENE_40;
>>>
>>> public String search() throws IOException, ParseException {
>>> Analyzer analyzer = new StandardAnalyzer(VERSION);
>>> Directory directory = FSDirectory.open(index);
>>>
>>> DirectoryReader ireader = DirectoryReader.open(directory);
>>> IndexSearcher isearcher = new IndexSearcher(ireader);
>>>
>>> QueryParser parser = new QueryParser(VERSION, "labels", analyzer);
>>>
>>> Query q = parser.parse(getQuery());
>>> ScoreDoc[] hits = isearcher.search(q, 1000).scoreDocs;
>>>
>>> for (int i = 0; i < hits.length; i++) {
>>> Document hitDoc = isearcher.doc(hits[i].doc);
>>> System.out.println(hitDoc.getField("id"));
>>> }
>>> ireader.close();
>>> directory.close();
>>> return "search";
>>> }
>>> ----------------------
>>> Every time I try this, the search returns zero results. I tried with
>>> different fields (text and labels), both of which are indexed, and I
>>> tried different words. Any help would be appreciated.
>>>
>>> Here is the code for producing the index:
>>>
>>> public String crawl() throws IOException {
>>> Analyzer analyzer = new StandardAnalyzer(VERSION);
>>> Directory directory = FSDirectory.open(index);
>>>
>>> IndexWriterConfig config = new IndexWriterConfig(VERSION, analyzer);
>>> config.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
>>> IndexWriter iwriter = new IndexWriter(directory, config);
>>>
>>> DB db = new DB(); // JPA interface class.
>>>
>>> for ( Taxonomy t : db.taxonomy.all() ) {
>>> LOG.log(Level.INFO, "Scanning {0}", t);
>>>
>>> Document doc = new Document();
>>> doc.add(new LongField("id", t.getId(), Store.YES));
>>> LOG.log(Level.INFO, " id={0}", t.getId());
>>> StringBuilder text = new StringBuilder();
>>> for(Text l : t.getTexts()) {
>>> text.append(l.getWikiText())
>>> .append((' '));
>>> }
>>> if(text.length() > 0) {
>>> doc.add(new StringField("text", text.toString(),
>>> Field.Store.YES));
>>> LOG.log(Level.INFO, " text={0}", text);
>>> }
>>>
>>> StringBuilder labels = new StringBuilder();
>>> toIndex(labels, t.getLabels());
>>> for(Image l : t.getImages()) {
>>> toIndex(labels, l.getLabels());
>>> }
>>> doc.add(new StringField("labels", labels.toString(),
>>> Field.Store.NO));
>>> LOG.log(Level.INFO, " labels={0}", labels);
>>> StringBuilder sb = new StringBuilder();
>>> for ( Tag tag : t.getTags() ) {
>>> toIndex(sb, tag.getLabels());
>>> }
>>> if(!sb.toString().isEmpty()) {
>>> doc.add(new StringField("tags", sb.toString(),
>>> Field.Store.NO));
>>> LOG.log(Level.INFO, " tags={0}", sb);
>>> }
>>> iwriter.addDocument(doc);
>>> }
>>>
>>> db.close();
>>> iwriter.close();
>>>
>>> return "search";
>>> }
>>>
>>> private void toIndex(StringBuilder sb, LabelGroup lg) {
>>> for(Label l : lg.getLabels()) {
>>> sb.append(l.getText());
>>> sb.append(" ");
>>> }
>>> }
>>>
>>>
>>> --
>>> Ramon Casha
>>>
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