| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.analysis.MockAnalyzer; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.index.IndexWriterConfig.OpenMode; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.util.TestUtil; |
| |
| |
| public class TestSegmentTermEnum extends LuceneTestCase { |
| |
| Directory dir; |
| |
| @Override |
| public void setUp() throws Exception { |
| super.setUp(); |
| dir = newDirectory(); |
| } |
| |
| @Override |
| public void tearDown() throws Exception { |
| dir.close(); |
| super.tearDown(); |
| } |
| |
| public void testTermEnum() throws IOException { |
| IndexWriter writer = null; |
| |
| writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random()))); |
| |
| // ADD 100 documents with term : aaa |
| // add 100 documents with terms: aaa bbb |
| // Therefore, term 'aaa' has document frequency of 200 and term 'bbb' 100 |
| for (int i = 0; i < 100; i++) { |
| addDoc(writer, "aaa"); |
| addDoc(writer, "aaa bbb"); |
| } |
| |
| writer.close(); |
| |
| // verify document frequency of terms in an multi segment index |
| verifyDocFreq(); |
| |
| // merge segments |
| writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setOpenMode(OpenMode.APPEND)); |
| writer.forceMerge(1); |
| writer.close(); |
| |
| // verify document frequency of terms in a single segment index |
| verifyDocFreq(); |
| } |
| |
| public void testPrevTermAtEnd() throws IOException |
| { |
| IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(new MockAnalyzer(random())) |
| .setCodec(TestUtil.alwaysPostingsFormat(TestUtil.getDefaultPostingsFormat()))); |
| addDoc(writer, "aaa bbb"); |
| writer.close(); |
| LeafReader reader = getOnlyLeafReader(DirectoryReader.open(dir)); |
| TermsEnum terms = reader.terms("content").iterator(); |
| assertNotNull(terms.next()); |
| assertEquals("aaa", terms.term().utf8ToString()); |
| assertNotNull(terms.next()); |
| long ordB; |
| try { |
| ordB = terms.ord(); |
| } catch (UnsupportedOperationException uoe) { |
| // ok -- codec is not required to support ord |
| reader.close(); |
| return; |
| } |
| assertEquals("bbb", terms.term().utf8ToString()); |
| assertNull(terms.next()); |
| |
| terms.seekExact(ordB); |
| assertEquals("bbb", terms.term().utf8ToString()); |
| reader.close(); |
| } |
| |
| private void verifyDocFreq() |
| throws IOException |
| { |
| IndexReader reader = DirectoryReader.open(dir); |
| TermsEnum termEnum = MultiTerms.getTerms(reader, "content").iterator(); |
| |
| // create enumeration of all terms |
| // go to the first term (aaa) |
| termEnum.next(); |
| // assert that term is 'aaa' |
| assertEquals("aaa", termEnum.term().utf8ToString()); |
| assertEquals(200, termEnum.docFreq()); |
| // go to the second term (bbb) |
| termEnum.next(); |
| // assert that term is 'bbb' |
| assertEquals("bbb", termEnum.term().utf8ToString()); |
| assertEquals(100, termEnum.docFreq()); |
| |
| |
| // create enumeration of terms after term 'aaa', |
| // including 'aaa' |
| termEnum.seekCeil(new BytesRef("aaa")); |
| // assert that term is 'aaa' |
| assertEquals("aaa", termEnum.term().utf8ToString()); |
| assertEquals(200, termEnum.docFreq()); |
| // go to term 'bbb' |
| termEnum.next(); |
| // assert that term is 'bbb' |
| assertEquals("bbb", termEnum.term().utf8ToString()); |
| assertEquals(100, termEnum.docFreq()); |
| reader.close(); |
| } |
| |
| private void addDoc(IndexWriter writer, String value) throws IOException |
| { |
| Document doc = new Document(); |
| doc.add(newTextField("content", value, Field.Store.NO)); |
| writer.addDocument(doc); |
| } |
| } |