+++ /dev/null
-package org.apache.lucene.search;
-
-/**
- * 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 java.io.IOException;
-
-import org.apache.lucene.analysis.MockAnalyzer;
-import org.apache.lucene.analysis.MockTokenizer;
-import org.apache.lucene.document.Document;
-import org.apache.lucene.document.Field;
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.index.RandomIndexWriter;
-import org.apache.lucene.store.Directory;
-import org.apache.lucene.util.LuceneTestCase;
-import org.apache.lucene.util._TestUtil;
-
-/**
- * Create an index with random unicode terms
- * Generates random prefix queries, and validates against a simple impl.
- */
-public class TestPrefixRandom extends LuceneTestCase {
- private IndexSearcher searcher;
- private IndexReader reader;
- private Directory dir;
-
- @Override
- public void setUp() throws Exception {
- super.setUp();
- dir = newDirectory();
- RandomIndexWriter writer = new RandomIndexWriter(random, dir,
- newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random, MockTokenizer.KEYWORD, false))
- .setMaxBufferedDocs(_TestUtil.nextInt(random, 50, 1000)));
-
- Document doc = new Document();
- Field bogus1 = newField("bogus", "", Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS);
- Field field = newField("field", "", Field.Store.NO, Field.Index.NOT_ANALYZED);
- Field bogus2 = newField("zbogus", "", Field.Store.NO, Field.Index.NOT_ANALYZED_NO_NORMS);
- doc.add(field);
- doc.add(bogus1);
- doc.add(bogus2);
-
- int num = atLeast(2000);
-
- for (int i = 0; i < num; i++) {
- field.setValue(_TestUtil.randomUnicodeString(random, 10));
- bogus1.setValue(_TestUtil.randomUnicodeString(random, 10));
- bogus2.setValue(_TestUtil.randomUnicodeString(random, 10));
- writer.addDocument(doc);
- }
- reader = writer.getReader();
- searcher = newSearcher(reader);
- writer.close();
- }
-
- @Override
- public void tearDown() throws Exception {
- reader.close();
- searcher.close();
- dir.close();
- super.tearDown();
- }
-
- /** a stupid prefix query that just blasts thru the terms */
- private class DumbPrefixQuery extends MultiTermQuery {
- private final Term prefix;
-
- DumbPrefixQuery(Term term) {
- super();
- prefix = term;
- }
-
- @Override
- protected FilteredTermEnum getEnum(IndexReader reader) throws IOException {
- return new SimplePrefixTermEnum(reader, prefix);
- }
-
- private class SimplePrefixTermEnum extends FilteredTermEnum {
- private final Term prefix;
- private boolean endEnum;
-
- private SimplePrefixTermEnum(IndexReader reader, Term prefix) throws IOException {
- this.prefix = prefix;
- setEnum(reader.terms(new Term(prefix.field(), "")));
- }
-
- @Override
- protected boolean termCompare(Term term) {
- if (term.field() == prefix.field()) {
- return term.text().startsWith(prefix.text());
- } else {
- endEnum = true;
- return false;
- }
- }
-
- @Override
- public float difference() {
- return 1.0F;
- }
-
- @Override
- protected boolean endEnum() {
- return endEnum;
- }
- }
-
- @Override
- public String toString(String field) {
- return field.toString() + ":" + prefix.toString();
- }
- }
-
- /** test a bunch of random prefixes */
- public void testPrefixes() throws Exception {
- int num = atLeast(1000);
- for (int i = 0; i < num; i++)
- assertSame(_TestUtil.randomUnicodeString(random, 5));
- }
-
- /** check that the # of hits is the same as from a very
- * simple prefixquery implementation.
- */
- private void assertSame(String prefix) throws IOException {
- PrefixQuery smart = new PrefixQuery(new Term("field", prefix));
- DumbPrefixQuery dumb = new DumbPrefixQuery(new Term("field", prefix));
-
- TopDocs smartDocs = searcher.search(smart, 25);
- TopDocs dumbDocs = searcher.search(dumb, 25);
- CheckHits.checkEqual(smart, smartDocs.scoreDocs, dumbDocs.scoreDocs);
- }
-}