Hi all the following is using Lucene 2.2.0. I've been trying to alter the scoring of my search results to boost by date. My idea was to boost documents while indexing using the date but it doesn't work. So I put together this little sample piece of code to investigate further and apparently setting the document boost does nothing. In my example below, you'd expect the display the output 20 2 and 10 but I get 1 1 1. Is this normal behavior and if so how am I supposed to use document boosting because it seems like I'm missing something... Here's the sample of code: ----------- import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.store.FSDirectory; public class IndexTest { /** * @param args */ public static void main(String[] args) throws Exception { // Create bogus index IndexWriter writer = new IndexWriter(FSDirectory.getDirectory("C:/lucene_test/"), new StandardAnalyzer(), true); writer.setUseCompoundFile(true); Document doc = new Document(); doc.add(new Field("testfield", "high ranking", Field.Store.YES, Field.Index.TOKENIZED)); doc.setBoost(20); writer.addDocument(doc); doc = new Document(); doc.add(new Field("testfield", "low ranking", Field.Store.YES, Field.Index.TOKENIZED)); doc.setBoost(2); writer.addDocument(doc); doc = new Document(); doc.add(new Field("testfield", "mid ranking", Field.Store.YES, Field.Index.TOKENIZED)); doc.setBoost(10); writer.addDocument(doc); writer.close(); // Read bogus index IndexReader reader = IndexReader.open(FSDirectory.getDirectory("C:/lucene_test/")); System.out.println(reader.document(0).getBoost()); System.out.println(reader.document(1).getBoost()); System.out.println(reader.document(2).getBoost()); } }