| /* |
| * 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.analysis.reverse; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.MockTokenizer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.BaseTokenStreamTestCase; |
| import org.apache.lucene.analysis.Tokenizer; |
| import org.apache.lucene.analysis.core.KeywordTokenizer; |
| |
| public class TestReverseStringFilter extends BaseTokenStreamTestCase { |
| public void testFilter() throws Exception { |
| TokenStream stream = new MockTokenizer(MockTokenizer.WHITESPACE, false); // 1-4 length string |
| ((Tokenizer)stream).setReader(new StringReader("Do have a nice day")); |
| ReverseStringFilter filter = new ReverseStringFilter(stream); |
| assertTokenStreamContents(filter, new String[] { "oD", "evah", "a", "ecin", "yad" }); |
| } |
| |
| public void testFilterWithMark() throws Exception { |
| TokenStream stream = new MockTokenizer(MockTokenizer.WHITESPACE, false); // 1-4 length string |
| ((Tokenizer)stream).setReader(new StringReader("Do have a nice day")); |
| ReverseStringFilter filter = new ReverseStringFilter(stream, '\u0001'); |
| assertTokenStreamContents(filter, |
| new String[] { "\u0001oD", "\u0001evah", "\u0001a", "\u0001ecin", "\u0001yad" }); |
| } |
| |
| public void testReverseString() throws Exception { |
| assertEquals( "A", ReverseStringFilter.reverse( "A" ) ); |
| assertEquals( "BA", ReverseStringFilter.reverse( "AB" ) ); |
| assertEquals( "CBA", ReverseStringFilter.reverse( "ABC" ) ); |
| } |
| |
| public void testReverseChar() throws Exception { |
| char[] buffer = { 'A', 'B', 'C', 'D', 'E', 'F' }; |
| ReverseStringFilter.reverse( buffer, 2, 3 ); |
| assertEquals( "ABEDCF", new String( buffer ) ); |
| } |
| |
| public void testReverseSupplementary() throws Exception { |
| // supplementary at end |
| assertEquals("𩬅艱鍟䇹愯瀛", ReverseStringFilter.reverse("瀛愯䇹鍟艱𩬅")); |
| // supplementary at end - 1 |
| assertEquals("a𩬅艱鍟䇹愯瀛", ReverseStringFilter.reverse("瀛愯䇹鍟艱𩬅a")); |
| // supplementary at start |
| assertEquals("fedcba𩬅", ReverseStringFilter.reverse("𩬅abcdef")); |
| // supplementary at start + 1 |
| assertEquals("fedcba𩬅z", ReverseStringFilter.reverse("z𩬅abcdef")); |
| // supplementary medial |
| assertEquals("gfe𩬅dcba", ReverseStringFilter.reverse("abcd𩬅efg")); |
| } |
| |
| public void testReverseSupplementaryChar() throws Exception { |
| // supplementary at end |
| char[] buffer = "abc瀛愯䇹鍟艱𩬅".toCharArray(); |
| ReverseStringFilter.reverse(buffer, 3, 7); |
| assertEquals("abc𩬅艱鍟䇹愯瀛", new String(buffer)); |
| // supplementary at end - 1 |
| buffer = "abc瀛愯䇹鍟艱𩬅d".toCharArray(); |
| ReverseStringFilter.reverse(buffer, 3, 8); |
| assertEquals("abcd𩬅艱鍟䇹愯瀛", new String(buffer)); |
| // supplementary at start |
| buffer = "abc𩬅瀛愯䇹鍟艱".toCharArray(); |
| ReverseStringFilter.reverse(buffer, 3, 7); |
| assertEquals("abc艱鍟䇹愯瀛𩬅", new String(buffer)); |
| // supplementary at start + 1 |
| buffer = "abcd𩬅瀛愯䇹鍟艱".toCharArray(); |
| ReverseStringFilter.reverse(buffer, 3, 8); |
| assertEquals("abc艱鍟䇹愯瀛𩬅d", new String(buffer)); |
| // supplementary medial |
| buffer = "abc瀛愯𩬅def".toCharArray(); |
| ReverseStringFilter.reverse(buffer, 3, 7); |
| assertEquals("abcfed𩬅愯瀛", new String(buffer)); |
| } |
| |
| /** blast some random strings through the analyzer */ |
| public void testRandomStrings() throws Exception { |
| Analyzer a = new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false); |
| return new TokenStreamComponents(tokenizer, new ReverseStringFilter(tokenizer)); |
| } |
| }; |
| checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER); |
| a.close(); |
| } |
| |
| public void testEmptyTerm() throws IOException { |
| Analyzer a = new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer tokenizer = new KeywordTokenizer(); |
| return new TokenStreamComponents(tokenizer, new ReverseStringFilter(tokenizer)); |
| } |
| }; |
| checkOneTerm(a, "", ""); |
| a.close(); |
| } |
| } |