package org.apache.lucene.search.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.CorruptIndexException;
import org.apache.lucene.search.Hits;
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;
/**
* 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 {
/* @override constructor */
public TestOrdValues(String name) {
super(name);
}
/* @override */
protected void tearDown() throws Exception {
super.tearDown();
}
/* @override */
protected void setUp() throws Exception {
// prepare a small index with just a few documents.
super.setUp();
}
/** Test OrdFieldSource */
public void testOrdFieldRank () throws CorruptIndexException, Exception {
doTestRank(ID_FIELD,true);
}
/** Test ReverseOrdFieldSource */
public void testReverseOrdFieldRank () throws CorruptIndexException, Exception {
doTestRank(ID_FIELD,false);
}
// Test that queries based on reverse/ordFieldScore scores correctly
private void doTestRank (String field, boolean inOrder) throws CorruptIndexException, Exception {
IndexSearcher s = new IndexSearcher(dir);
ValueSource vs;
if (inOrder) {
vs = new OrdFieldSource(field);
} else {
vs = new ReverseOrdFieldSource(field);
}
Query q = new ValueSourceQuery(vs);
log("test: "+q);
QueryUtils.check(q,s);
Hits h = s.search(q);
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 = h.doc(i).get(ID_FIELD);
log(i+". score="+h.score(i)+" - "+resID);
log(s.explain(q,h.id(i)));
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;
}
}
/** Test exact score for OrdFieldSource */
public void testOrdFieldExactScore () throws CorruptIndexException, Exception {
doTestExactScore(ID_FIELD,true);
}
/** Test exact score for ReverseOrdFieldSource */
public void testReverseOrdFieldExactScore () throws CorruptIndexException, 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 CorruptIndexException, Exception {
IndexSearcher s = new IndexSearcher(dir);
ValueSource vs;
if (inOrder) {
vs = new OrdFieldSource(field);
} else {
vs = new ReverseOrdFieldSource(field);
}
Query q = new ValueSourceQuery(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;
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));
}
}
/** Test caching OrdFieldSource */
public void testCachingOrd () throws CorruptIndexException, Exception {
doTestCaching(ID_FIELD,true);
}
/** Test caching for ReverseOrdFieldSource */
public void tesCachingReverseOrd () throws CorruptIndexException, Exception {
doTestCaching(ID_FIELD,false);
}
// Test that values loaded for FieldScoreQuery are cached properly and consumes the proper RAM resources.
private void doTestCaching (String field, boolean inOrder) throws CorruptIndexException, Exception {
IndexSearcher s = new IndexSearcher(dir);
Object innerArray = null;
for (int i=0; i<10; i++) {
ValueSource vs;
if (inOrder) {
vs = new OrdFieldSource(field);
} else {
vs = new ReverseOrdFieldSource(field);
}
ValueSourceQuery q = new ValueSourceQuery(vs);
Hits h = s.search(q);
assertEquals("All docs should be matched!",N_DOCS,h.length());
if (i==0) {
innerArray = q.valSrc.getValues(s.getIndexReader()).getInnerArray();
} else {
log(i+". compare: "+innerArray+" to "+q.valSrc.getValues(s.getIndexReader()).getInnerArray());
assertSame("field values should be cached and reused!", innerArray, q.valSrc.getValues(s.getIndexReader()).getInnerArray());
}
}
ValueSource vs;
ValueSourceQuery q;
Hits h;
// verify that different values are loaded for a different field
String field2 = INT_FIELD;
assertFalse(field.equals(field2)); // otherwise this test is meaningless.
if (inOrder) {
vs = new OrdFieldSource(field2);
} else {
vs = new ReverseOrdFieldSource(field2);
}
q = new ValueSourceQuery(vs);
h = s.search(q);
assertEquals("All docs should be matched!",N_DOCS,h.length());
log("compare (should differ): "+innerArray+" to "+q.valSrc.getValues(s.getIndexReader()).getInnerArray());
assertNotSame("different values shuold be loaded for a different field!", innerArray, q.valSrc.getValues(s.getIndexReader()).getInnerArray());
// verify new values are reloaded (not reused) for a new reader
s = new IndexSearcher(dir);
if (inOrder) {
vs = new OrdFieldSource(field);
} else {
vs = new ReverseOrdFieldSource(field);
}
q = new ValueSourceQuery(vs);
h = s.search(q);
assertEquals("All docs should be matched!",N_DOCS,h.length());
log("compare (should differ): "+innerArray+" to "+q.valSrc.getValues(s.getIndexReader()).getInnerArray());
assertNotSame("cached field values should not be reused if reader as changed!", innerArray, q.valSrc.getValues(s.getIndexReader()).getInnerArray());
}
}
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