package org.apache.lucene.queries.function;
/*
* 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.
*/
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queries.function.valuesource.OrdFieldSource;
import org.apache.lucene.queries.function.valuesource.ReverseOrdFieldSource;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryUtils;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.junit.BeforeClass;
import org.junit.Test;
/**
* Test search based on OrdFieldSource and ReverseOrdFieldSource.
* <p/>
* Tests here create an index with a few documents, each having
* an indexed "id" field.
* The ord values of this field are later used for scoring.
* <p/>
* The order tests use Hits to verify that docs are ordered as expected.
* <p/>
* The exact score tests use TopDocs top to verify the exact score.
*/
public class TestOrdValues extends FunctionTestSetup {
@BeforeClass
public static void beforeClass() throws Exception {
createIndex(false);
}
/**
* Test OrdFieldSource
*/
@Test
public void testOrdFieldRank() throws Exception {
doTestRank(ID_FIELD, true);
}
/**
* Test ReverseOrdFieldSource
*/
@Test
public void testReverseOrdFieldRank() throws Exception {
doTestRank(ID_FIELD, false);
}
// Test that queries based on reverse/ordFieldScore scores correctly
private void doTestRank(String field, boolean inOrder) throws Exception {
IndexReader r = DirectoryReader.open(dir);
IndexSearcher s = newSearcher(r);
ValueSource vs;
if (inOrder) {
vs = new OrdFieldSource(field);
} else {
vs = new ReverseOrdFieldSource(field);
}
Query q = new FunctionQuery(vs);
log("test: " + q);
QueryUtils.check(random(), q, s);
ScoreDoc[] h = s.search(q, null, 1000).scoreDocs;
assertEquals("All docs should be matched!", N_DOCS, h.length);
String prevID = inOrder
? "IE" // greater than all ids of docs in this test ("ID0001", etc.)
: "IC"; // smaller than all ids of docs in this test ("ID0001", etc.)
for (int i = 0; i < h.length; i++) {
String resID = s.doc(h[i].doc).get(ID_FIELD);
log(i + ". score=" + h[i].score + " - " + resID);
log(s.explain(q, h[i].doc));
if (inOrder) {
assertTrue("res id " + resID + " should be < prev res id " + prevID, resID.compareTo(prevID) < 0);
} else {
assertTrue("res id " + resID + " should be > prev res id " + prevID, resID.compareTo(prevID) > 0);
}
prevID = resID;
}
r.close();
}
/**
* Test exact score for OrdFieldSource
*/
@Test
public void testOrdFieldExactScore() throws Exception {
doTestExactScore(ID_FIELD, true);
}
/**
* Test exact score for ReverseOrdFieldSource
*/
@Test
public void testReverseOrdFieldExactScore() throws Exception {
doTestExactScore(ID_FIELD, false);
}
// Test that queries based on reverse/ordFieldScore returns docs with expected score.
private void doTestExactScore(String field, boolean inOrder) throws Exception {
IndexReader r = DirectoryReader.open(dir);
IndexSearcher s = newSearcher(r);
ValueSource vs;
if (inOrder) {
vs = new OrdFieldSource(field);
} else {
vs = new ReverseOrdFieldSource(field);
}
Query q = new FunctionQuery(vs);
TopDocs td = s.search(q, null, 1000);
assertEquals("All docs should be matched!", N_DOCS, td.totalHits);
ScoreDoc sd[] = td.scoreDocs;
for (int i = 0; i < sd.length; i++) {
float score = sd[i].score;
String id = s.getIndexReader().document(sd[i].doc).get(ID_FIELD);
log("-------- " + i + ". Explain doc " + id);
log(s.explain(q, sd[i].doc));
float expectedScore = N_DOCS - i - 1;
assertEquals("score of result " + i + " shuould be " + expectedScore + " != " + score, expectedScore, score, TEST_SCORE_TOLERANCE_DELTA);
String expectedId = inOrder
? id2String(N_DOCS - i) // in-order ==> larger values first
: id2String(i + 1); // reverse ==> smaller values first
assertTrue("id of result " + i + " shuould be " + expectedId + " != " + score, expectedId.equals(id));
}
r.close();
}
// LUCENE-1250
public void testEqualsNull() throws Exception {
OrdFieldSource ofs = new OrdFieldSource("f");
assertFalse(ofs.equals(null));
ReverseOrdFieldSource rofs = new ReverseOrdFieldSource("f");
assertFalse(rofs.equals(null));
}
}