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package org.apache.lucene.search;
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import java.io.IOException;
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import java.text.Collator;
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import java.util.Locale;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.index.RandomIndexWriter;
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import org.apache.lucene.search.BooleanClause.Occur;
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import org.apache.lucene.store.Directory;
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import org.apache.lucene.util.LuceneTestCase;
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import org.apache.lucene.util._TestUtil;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* Tests Locale-based sort and range search
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public class TestLocaleMethods extends LuceneTestCase {
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private static Locale locale;
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private static Collator collator;
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private static IndexSearcher searcher;
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private static IndexReader reader;
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private static Directory dir;
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private static int numDocs;
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public static void beforeClass() throws Exception {
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locale = LuceneTestCase.randomLocale(random);
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collator = Collator.getInstance(locale);
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numDocs = 1000 * RANDOM_MULTIPLIER;
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RandomIndexWriter iw = new RandomIndexWriter(random, dir);
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for (int i = 0; i < numDocs; i++) {
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Document doc = new Document();
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String value = _TestUtil.randomUnicodeString(random);
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Field field = newField("field", value, Field.Store.YES, Field.Index.NOT_ANALYZED_NO_NORMS);
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reader = iw.getReader();
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searcher = newSearcher(reader);
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public static void afterClass() throws Exception {
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public void testSort() throws Exception {
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SortField sf = new SortField("field", locale);
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TopFieldDocs docs = searcher.search(new MatchAllDocsQuery(), null, numDocs, new Sort(sf));
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for (ScoreDoc doc : docs.scoreDocs) {
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String value = reader.document(doc.doc).get("field");
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assertTrue(collator.compare(value, prev) >= 0);
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public void testSort2() throws Exception {
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SortField sf = new SortField("field", new FieldComparatorSource() {
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public FieldComparator newComparator(String fieldname, int numHits, int sortPos, boolean reversed) throws IOException {
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return new FieldComparator.StringComparatorLocale(numHits, fieldname, locale);
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TopFieldDocs docs = searcher.search(new MatchAllDocsQuery(), null, numDocs, new Sort(sf));
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for (ScoreDoc doc : docs.scoreDocs) {
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String value = reader.document(doc.doc).get("field");
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assertTrue(collator.compare(value, prev) >= 0);
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private void doTestRanges(String startPoint, String endPoint, Query query) throws Exception {
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TopDocs docs = searcher.search(query, numDocs);
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for (ScoreDoc doc : docs.scoreDocs) {
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String value = reader.document(doc.doc).get("field");
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assertTrue(collator.compare(value, startPoint) >= 0);
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assertTrue(collator.compare(value, endPoint) <= 0);
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BooleanQuery bq = new BooleanQuery();
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bq.add(new MatchAllDocsQuery(), Occur.SHOULD);
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bq.add(query, Occur.MUST_NOT);
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docs = searcher.search(bq, numDocs);
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for (ScoreDoc doc : docs.scoreDocs) {
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String value = reader.document(doc.doc).get("field");
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assertTrue(collator.compare(value, startPoint) < 0 || collator.compare(value, endPoint) > 0);
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public void testRangeQuery() throws Exception {
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int numQueries = 100*RANDOM_MULTIPLIER;
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for (int i = 0; i < numQueries; i++) {
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String startPoint = _TestUtil.randomUnicodeString(random);
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String endPoint = _TestUtil.randomUnicodeString(random);
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Query query = new TermRangeQuery("field", startPoint, endPoint, true, true, collator);
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doTestRanges(startPoint, endPoint, query);
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public void testRangeFilter() throws Exception {
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int numQueries = 100*RANDOM_MULTIPLIER;
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for (int i = 0; i < numQueries; i++) {
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String startPoint = _TestUtil.randomUnicodeString(random);
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String endPoint = _TestUtil.randomUnicodeString(random);
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Query query = new ConstantScoreQuery(new TermRangeFilter("field", startPoint, endPoint, true, true, collator));
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doTestRanges(startPoint, endPoint, query);