RAMDirectory store = new RAMDirectory();
IndexWriter writer = new IndexWriter(store, new SimpleAnalyzer(), true);
// add the same document four times
Fieldable f1 = new Field("field", "word", Field.Store.YES, Field.Index.TOKENIZED);
Document d1 = new Document();
d1.add(f1);
writer.addDocument(d1);
writer.addDocument(d1);
writer.addDocument(d1);
writer.addDocument(d1);
writer.close();
// reset the boost of each instance of this document
IndexReader reader = IndexReader.open(store);
reader.setNorm(0, "field", 1.0f);
reader.setNorm(1, "field", 2.0f);
reader.setNorm(2, "field", 4.0f);
reader.setNorm(3, "field", 16.0f);
reader.close();
// check that searches are ordered by this boost
final float[] scores = new float[4];
new IndexSearcher(store).search
(new TermQuery(new Term("field", "word")),
new HitCollector() {
public final void collect(int doc, float score) {
scores[doc] = score;
}
});
float lastScore = 0.0f;
for (int i = 0; i < 4; i++) {
assertTrue(scores[i] > lastScore);
lastScore = scores[i];
}
