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POLucene SpanNearQuery
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copied!<p>I am trying to understand Lucene SpanNearQuery and wrote up a dummy example. I am looking for "not" followed by "fox" within 5 of each other. I would expect document 3 to be returned as the only hit. However, I end up getting no hits. Any thoughts on what might I be doing wrong will be appreciated.</p> <p>Here is the code:</p> <p>//indexing </p> <pre><code>public void doSpanIndexing() throws IOException { IndexWriter writer=new IndexWriter(directory, AnalyzerUtil.getPorterStemmerAnalyzer(new StandardAnalyzer(Version.LUCENE_30)),IndexWriter.MaxFieldLength.LIMITED); Document doc1=new Document(); doc1.add(new Field("content", " brown fox jumped ", Field.Store.YES, Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS)); writer.addDocument(doc1); Document doc2=new Document(); doc2.add(new Field("content", "foxes not jumped over the huge fence", Field.Store.YES, Index.ANALYZED,Field.TermVector.WITH_POSITIONS_OFFSETS)); writer.addDocument(doc2); Document doc3=new Document(); doc3.add(new Field("content", " brown not fox", Field.Store.YES, Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS)); writer.addDocument(doc3); } </code></pre> <p>//searching<br> public void doSpanSearching(String text) throws CorruptIndexException, IOException, ParseException {</p> <pre><code> IndexSearcher searcher=new IndexSearcher(directory); SpanTermQuery term1 = new SpanTermQuery(new Term("content", "not")); SpanTermQuery term2 = new SpanTermQuery(new Term("content", text)); SpanNearQuery query = new SpanNearQuery(new SpanQuery[] {term1, term2}, 5, true); TopDocs topDocs=searcher.search(query,5); for(int i=0; i<topDocs.totalHits; i++) { System.out.println("Hit Document number: "+topDocs.scoreDocs[i].doc); System.out.println("Hit Document score: "+topDocs.scoreDocs[i].score); Document result=searcher.doc(topDocs.scoreDocs[i].doc); System.out.println("Search result "+(i+1)+ " is "+result.get("content")); } } </code></pre>

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