| /* |
| * 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.miscellaneous; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.BaseTokenStreamTestCase; |
| import org.apache.lucene.analysis.MockTokenizer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.synonym.SynonymFilter; |
| import org.apache.lucene.analysis.synonym.SynonymMap; |
| import org.apache.lucene.util.CharsRef; |
| import org.apache.lucene.util.CharsRefBuilder; |
| import org.junit.Test; |
| |
| public class TestLimitTokenPositionFilter extends BaseTokenStreamTestCase { |
| |
| public void testMaxPosition2() throws IOException { |
| for (final boolean consumeAll : new boolean[] {true, false}) { |
| Analyzer a = |
| new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| MockTokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false); |
| // if we are consuming all tokens, we can use the checks, otherwise we can't |
| tokenizer.setEnableChecks(consumeAll); |
| return new TokenStreamComponents( |
| tokenizer, new LimitTokenPositionFilter(tokenizer, 2, consumeAll)); |
| } |
| }; |
| |
| // don't use assertAnalyzesTo here, as the end offset is not the end of the string (unless |
| // consumeAll is true, in which case it's correct)! |
| assertTokenStreamContents( |
| a.tokenStream("dummy", "1 2 3 4 5"), |
| new String[] {"1", "2"}, |
| new int[] {0, 3}, |
| new int[] {1, 4}, |
| consumeAll ? 16 : null); |
| assertTokenStreamContents( |
| a.tokenStream("dummy", new StringReader("1 2 3 4 5")), |
| new String[] {"1", "2"}, |
| new int[] {0, 2}, |
| new int[] {1, 3}, |
| consumeAll ? 9 : null); |
| |
| // less than the limit, ensure we behave correctly |
| assertTokenStreamContents( |
| a.tokenStream("dummy", "1 "), |
| new String[] {"1"}, |
| new int[] {0}, |
| new int[] {1}, |
| consumeAll ? 3 : null); |
| |
| // equal to limit |
| assertTokenStreamContents( |
| a.tokenStream("dummy", "1 2 "), |
| new String[] {"1", "2"}, |
| new int[] {0, 3}, |
| new int[] {1, 4}, |
| consumeAll ? 6 : null); |
| a.close(); |
| } |
| } |
| |
| public void testMaxPosition3WithSynomyms() throws IOException { |
| for (final boolean consumeAll : new boolean[] {true, false}) { |
| MockTokenizer tokenizer = whitespaceMockTokenizer("one two three four five"); |
| // if we are consuming all tokens, we can use the checks, otherwise we can't |
| tokenizer.setEnableChecks(consumeAll); |
| |
| SynonymMap.Builder builder = new SynonymMap.Builder(true); |
| builder.add(new CharsRef("one"), new CharsRef("first"), true); |
| builder.add(new CharsRef("one"), new CharsRef("alpha"), true); |
| builder.add(new CharsRef("one"), new CharsRef("beguine"), true); |
| CharsRefBuilder multiWordCharsRef = new CharsRefBuilder(); |
| SynonymMap.Builder.join( |
| new String[] {"and", "indubitably", "single", "only"}, multiWordCharsRef); |
| builder.add(new CharsRef("one"), multiWordCharsRef.get(), true); |
| SynonymMap.Builder.join(new String[] {"dopple", "ganger"}, multiWordCharsRef); |
| builder.add(new CharsRef("two"), multiWordCharsRef.get(), true); |
| SynonymMap synonymMap = builder.build(); |
| @SuppressWarnings("deprecation") |
| TokenStream stream = new SynonymFilter(tokenizer, synonymMap, true); |
| stream = new LimitTokenPositionFilter(stream, 3, consumeAll); |
| |
| // "only", the 4th word of multi-word synonym "and indubitably single only" is not emitted, |
| // since its position is greater than 3. |
| assertTokenStreamContents( |
| stream, |
| new String[] { |
| "one", |
| "first", |
| "alpha", |
| "beguine", |
| "and", |
| "two", |
| "indubitably", |
| "dopple", |
| "three", |
| "single", |
| "ganger" |
| }, |
| new int[] {1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0}); |
| } |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testIllegalArguments() throws Exception { |
| new LimitTokenPositionFilter(whitespaceMockTokenizer("one two three four five"), 0); |
| } |
| } |