| /* |
| * 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; |
| |
| import java.io.IOException; |
| import java.util.Random; |
| |
| public class TestLookaheadTokenFilter extends BaseTokenStreamTestCase { |
| |
| public void testRandomStrings() throws Exception { |
| Analyzer a = new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| Random random = random(); |
| Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, random.nextBoolean()); |
| TokenStream output = new MockRandomLookaheadTokenFilter(random, tokenizer); |
| return new TokenStreamComponents(tokenizer, output); |
| } |
| }; |
| int maxLength = TEST_NIGHTLY ? 8192 : 1024; |
| checkRandomData(random(), a, 50*RANDOM_MULTIPLIER, maxLength); |
| } |
| |
| private static class NeverPeeksLookaheadTokenFilter extends LookaheadTokenFilter<LookaheadTokenFilter.Position> { |
| public NeverPeeksLookaheadTokenFilter(TokenStream input) { |
| super(input); |
| } |
| |
| @Override |
| public Position newPosition() { |
| return new Position(); |
| } |
| |
| @Override |
| public boolean incrementToken() throws IOException { |
| return nextToken(); |
| } |
| } |
| |
| public void testNeverCallingPeek() throws Exception { |
| Analyzer a = new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, random().nextBoolean()); |
| TokenStream output = new NeverPeeksLookaheadTokenFilter(tokenizer); |
| return new TokenStreamComponents(tokenizer, output); |
| } |
| }; |
| int maxLength = TEST_NIGHTLY ? 8192 : 1024; |
| checkRandomData(random(), a, 50*RANDOM_MULTIPLIER, maxLength); |
| } |
| |
| public void testMissedFirstToken() throws Exception { |
| Analyzer analyzer = new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer source = new MockTokenizer(MockTokenizer.WHITESPACE, false); |
| TrivialLookaheadFilter filter = new TrivialLookaheadFilter(source); |
| return new TokenStreamComponents(source, filter); |
| } |
| }; |
| |
| assertAnalyzesTo(analyzer, |
| "Only he who is running knows .", |
| new String[]{ |
| "Only", |
| "Only-huh?", |
| "he", |
| "he-huh?", |
| "who", |
| "who-huh?", |
| "is", |
| "is-huh?", |
| "running", |
| "running-huh?", |
| "knows", |
| "knows-huh?", |
| ".", |
| ".-huh?" |
| }); |
| } |
| } |