package org.apache.lucene.expressions;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.expressions.js.JavascriptCompiler;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Rescorer;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase.SuppressCodecs;
import org.apache.lucene.util.LuceneTestCase;
@SuppressCodecs("Lucene3x")
public class TestExpressionRescorer extends LuceneTestCase {
IndexSearcher searcher;
DirectoryReader reader;
Directory dir;
@Override
public void setUp() throws Exception {
super.setUp();
dir = newDirectory();
RandomIndexWriter iw = new RandomIndexWriter(random(), dir);
Document doc = new Document();
doc.add(newStringField("id", "1", Field.Store.YES));
doc.add(newTextField("body", "some contents and more contents", Field.Store.NO));
doc.add(new NumericDocValuesField("popularity", 5));
iw.addDocument(doc);
doc = new Document();
doc.add(newStringField("id", "2", Field.Store.YES));
doc.add(newTextField("body", "another document with different contents", Field.Store.NO));
doc.add(new NumericDocValuesField("popularity", 20));
iw.addDocument(doc);
doc = new Document();
doc.add(newStringField("id", "3", Field.Store.YES));
doc.add(newTextField("body", "crappy contents", Field.Store.NO));
doc.add(new NumericDocValuesField("popularity", 2));
iw.addDocument(doc);
reader = iw.getReader();
searcher = new IndexSearcher(reader);
iw.close();
}
@Override
public void tearDown() throws Exception {
reader.close();
dir.close();
super.tearDown();
}
public void testBasic() throws Exception {
// create a sort field and sort by it (reverse order)
Query query = new TermQuery(new Term("body", "contents"));
IndexReader r = searcher.getIndexReader();
// Just first pass query
TopDocs hits = searcher.search(query, 10);
assertEquals(3, hits.totalHits);
assertEquals("3", r.document(hits.scoreDocs[0].doc).get("id"));
assertEquals("1", r.document(hits.scoreDocs[1].doc).get("id"));
assertEquals("2", r.document(hits.scoreDocs[2].doc).get("id"));
// Now, rescore:
Expression e = JavascriptCompiler.compile("sqrt(_score) + ln(popularity)");
SimpleBindings bindings = new SimpleBindings();
bindings.add(new SortField("popularity", SortField.Type.INT));
bindings.add(new SortField("_score", SortField.Type.SCORE));
Rescorer rescorer = e.getRescorer(bindings);
hits = rescorer.rescore(searcher, hits, 10);
assertEquals(3, hits.totalHits);
assertEquals("2", r.document(hits.scoreDocs[0].doc).get("id"));
assertEquals("1", r.document(hits.scoreDocs[1].doc).get("id"));
assertEquals("3", r.document(hits.scoreDocs[2].doc).get("id"));
String expl = rescorer.explain(searcher,
searcher.explain(query, hits.scoreDocs[0].doc),
hits.scoreDocs[0].doc).toString();
// Confirm the explanation breaks out the individual
// variables:
assertTrue(expl.contains("= variable \"popularity\""));
// Confirm the explanation includes first pass details:
assertTrue(expl.contains("= first pass score"));
assertTrue(expl.contains("body:contents in"));
}
}