RAMDirectory store = new RAMDirectory();
IndexWriter writer = new IndexWriter(store, new SimpleAnalyzer(), true);
Field f1 = Field.Text("field", "word");
Field f2 = Field.Text("field", "word");
f2.setBoost(2.0f);
Document d1 = new Document();
Document d2 = new Document();
Document d3 = new Document();
Document d4 = new Document();
d3.setBoost(3.0f);
d4.setBoost(2.0f);
d1.add(f1); // boost = 1
d2.add(f2); // boost = 2
d3.add(f1); // boost = 3
d4.add(f2); // boost = 4
writer.addDocument(d1);
writer.addDocument(d2);
writer.addDocument(d3);
writer.addDocument(d4);
writer.optimize();
writer.close();
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];
}
