package org.apache.lucene.sandbox.queries;
import java.text.Collator;
import java.util.Locale;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.search.*;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.TestUtil;
import org.junit.AfterClass;
import org.junit.BeforeClass;
/*
* 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.
*/
/**
* Tests SlowCollatedStringComparator, SlowCollatedTermRangeQuery, and SlowCollatedTermRangeFilter
*/
public class TestSlowCollationMethods extends LuceneTestCase {
private static Collator collator;
private static IndexSearcher searcher;
private static IndexReader reader;
private static Directory dir;
private static int numDocs;
private static String splitDoc;
@BeforeClass
public static void beforeClass() throws Exception {
final Locale locale = LuceneTestCase.randomLocale(random());
collator = Collator.getInstance(locale);
collator.setStrength(Collator.IDENTICAL);
collator.setDecomposition(Collator.NO_DECOMPOSITION);
numDocs = 1000 * RANDOM_MULTIPLIER;
dir = newDirectory();
RandomIndexWriter iw = new RandomIndexWriter(random(), dir);
for (int i = 0; i < numDocs; i++) {
Document doc = new Document();
String value = TestUtil.randomUnicodeString(random());
Field field = newStringField("field", value, Field.Store.YES);
doc.add(field);
iw.addDocument(doc);
}
splitDoc = TestUtil.randomUnicodeString(random());
reader = iw.getReader();
iw.close();
searcher = newSearcher(reader);
}
@AfterClass
public static void afterClass() throws Exception {
reader.close();
dir.close();
collator = null;
searcher = null;
reader = null;
dir = null;
}
private void doCheckSorting(TopDocs docs) throws Exception {
String prev = "";
for (ScoreDoc doc : docs.scoreDocs) {
String value = reader.document(doc.doc).get("field");
assertTrue(collator.compare(value, prev) >= 0);
prev = value;
}
}
public void testSort() throws Exception {
SortField sf = new SortField("field", new FieldComparatorSource() {
@Override
public FieldComparator<String> newComparator(String fieldname, int numHits, int sortPos, boolean reversed) {
return new SlowCollatedStringComparator(numHits, fieldname, collator);
}
});
final Sort sort = new Sort(sf);
final TopDocs docs1 = searcher.search(TermRangeQuery.newStringRange("field", null, splitDoc, true, true), null, numDocs/(1+random().nextInt(4)), sort);
doCheckSorting(docs1);
final TopDocs docs2 = searcher.search(TermRangeQuery.newStringRange("field", splitDoc, null, true, true), null, numDocs/(1+random().nextInt(4)), sort);
doCheckSorting(docs2);
final TopDocs docs = TopDocs.merge(sort, numDocs/(1+random().nextInt(4)), new TopDocs[]{docs1, docs2});
doCheckSorting(docs);
}
private void doTestRanges(String startPoint, String endPoint, Query query) throws Exception {
QueryUtils.check(query);
// positive test
TopDocs docs = searcher.search(query, numDocs);
for (ScoreDoc doc : docs.scoreDocs) {
String value = reader.document(doc.doc).get("field");
assertTrue(collator.compare(value, startPoint) >= 0);
assertTrue(collator.compare(value, endPoint) <= 0);
}
// negative test
BooleanQuery bq = new BooleanQuery();
bq.add(new MatchAllDocsQuery(), Occur.SHOULD);
bq.add(query, Occur.MUST_NOT);
docs = searcher.search(bq, numDocs);
for (ScoreDoc doc : docs.scoreDocs) {
String value = reader.document(doc.doc).get("field");
assertTrue(collator.compare(value, startPoint) < 0 || collator.compare(value, endPoint) > 0);
}
}
public void testRangeQuery() throws Exception {
int numQueries = 50*RANDOM_MULTIPLIER;
for (int i = 0; i < numQueries; i++) {
String startPoint = TestUtil.randomUnicodeString(random());
String endPoint = TestUtil.randomUnicodeString(random());
Query query = new SlowCollatedTermRangeQuery("field", startPoint, endPoint, true, true, collator);
doTestRanges(startPoint, endPoint, query);
}
}
public void testRangeFilter() throws Exception {
int numQueries = 50*RANDOM_MULTIPLIER;
for (int i = 0; i < numQueries; i++) {
String startPoint = TestUtil.randomUnicodeString(random());
String endPoint = TestUtil.randomUnicodeString(random());
Query query = new ConstantScoreQuery(new SlowCollatedTermRangeFilter("field", startPoint, endPoint, true, true, collator));
doTestRanges(startPoint, endPoint, query);
}
}
public void testQuery() throws Exception {
// Copied from beforeClass, but scaled down to few docs:
// since otherwise this test can run for a very long
// time (1-2 hours or more; see Lucene-Solr-4.x-Linux Build #2204):
final Locale locale = LuceneTestCase.randomLocale(random());
Collator collator = Collator.getInstance(locale);
collator.setStrength(Collator.IDENTICAL);
collator.setDecomposition(Collator.NO_DECOMPOSITION);
int numDocs = 20 * RANDOM_MULTIPLIER;
Directory dir = newDirectory();
RandomIndexWriter iw = new RandomIndexWriter(random(), dir);
for (int i = 0; i < numDocs; i++) {
Document doc = new Document();
String value = TestUtil.randomUnicodeString(random());
Field field = newStringField("field", value, Field.Store.YES);
doc.add(field);
iw.addDocument(doc);
}
IndexReader reader = iw.getReader();
iw.close();
IndexSearcher searcher = newSearcher(reader);
String startPoint = TestUtil.randomUnicodeString(random());
String endPoint = TestUtil.randomUnicodeString(random());
Query query = new SlowCollatedTermRangeQuery("field", startPoint, endPoint, true, true, collator);
QueryUtils.check(random(), query, searcher);
reader.close();
dir.close();
collator = null;
searcher = null;
reader = null;
dir = null;
}
}