+++ /dev/null
-package org.apache.lucene.analysis;
-
-/**
- * Copyright 2005 The Apache Software Foundation
- *
- * Licensed 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 org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
-import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
-import org.apache.lucene.util.English;
-import org.apache.lucene.util.Version;
-
-import java.io.IOException;
-import java.io.StringReader;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Set;
-import java.util.HashSet;
-
-import org.apache.lucene.analysis.BaseTokenStreamTestCase;
-import org.apache.lucene.analysis.MockTokenizer;
-import org.apache.lucene.analysis.TokenStream;
-
-public class TestStopFilter extends BaseTokenStreamTestCase {
-
- // other StopFilter functionality is already tested by TestStopAnalyzer
-
- public void testExactCase() throws IOException {
- StringReader reader = new StringReader("Now is The Time");
- Set<String> stopWords = new HashSet<String>(Arrays.asList("is", "the", "Time"));
- TokenStream stream = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopWords, false);
- assertTokenStreamContents(stream, new String[] { "Now", "The" });
- }
-
- public void testIgnoreCase() throws IOException {
- StringReader reader = new StringReader("Now is The Time");
- Set<Object> stopWords = new HashSet<Object>(Arrays.asList( "is", "the", "Time" ));
- TokenStream stream = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopWords, true);
- assertTokenStreamContents(stream, new String[] { "Now" });
- }
-
- public void testStopFilt() throws IOException {
- StringReader reader = new StringReader("Now is The Time");
- String[] stopWords = new String[] { "is", "the", "Time" };
- Set<Object> stopSet = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords);
- TokenStream stream = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet);
- assertTokenStreamContents(stream, new String[] { "Now", "The" });
- }
-
- /**
- * Test Position increments applied by StopFilter with and without enabling this option.
- */
- public void testStopPositons() throws IOException {
- StringBuilder sb = new StringBuilder();
- ArrayList<String> a = new ArrayList<String>();
- for (int i=0; i<20; i++) {
- String w = English.intToEnglish(i).trim();
- sb.append(w).append(" ");
- if (i%3 != 0) a.add(w);
- }
- log(sb.toString());
- String stopWords[] = a.toArray(new String[0]);
- for (int i=0; i<a.size(); i++) log("Stop: "+stopWords[i]);
- Set<Object> stopSet = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords);
- // with increments
- StringReader reader = new StringReader(sb.toString());
- StopFilter stpf = new StopFilter(Version.LUCENE_24, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet);
- doTestStopPositons(stpf,true);
- // without increments
- reader = new StringReader(sb.toString());
- stpf = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet);
- doTestStopPositons(stpf,false);
- // with increments, concatenating two stop filters
- ArrayList<String> a0 = new ArrayList<String>();
- ArrayList<String> a1 = new ArrayList<String>();
- for (int i=0; i<a.size(); i++) {
- if (i%2==0) {
- a0.add(a.get(i));
- } else {
- a1.add(a.get(i));
- }
- }
- String stopWords0[] = a0.toArray(new String[0]);
- for (int i=0; i<a0.size(); i++) log("Stop0: "+stopWords0[i]);
- String stopWords1[] = a1.toArray(new String[0]);
- for (int i=0; i<a1.size(); i++) log("Stop1: "+stopWords1[i]);
- Set<Object> stopSet0 = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords0);
- Set<Object> stopSet1 = StopFilter.makeStopSet(TEST_VERSION_CURRENT, stopWords1);
- reader = new StringReader(sb.toString());
- StopFilter stpf0 = new StopFilter(TEST_VERSION_CURRENT, new MockTokenizer(reader, MockTokenizer.WHITESPACE, false), stopSet0); // first part of the set
- stpf0.setEnablePositionIncrements(true);
- StopFilter stpf01 = new StopFilter(TEST_VERSION_CURRENT, stpf0, stopSet1); // two stop filters concatenated!
- doTestStopPositons(stpf01,true);
- }
-
- private void doTestStopPositons(StopFilter stpf, boolean enableIcrements) throws IOException {
- log("---> test with enable-increments-"+(enableIcrements?"enabled":"disabled"));
- stpf.setEnablePositionIncrements(enableIcrements);
- CharTermAttribute termAtt = stpf.getAttribute(CharTermAttribute.class);
- PositionIncrementAttribute posIncrAtt = stpf.getAttribute(PositionIncrementAttribute.class);
- stpf.reset();
- for (int i=0; i<20; i+=3) {
- assertTrue(stpf.incrementToken());
- log("Token "+i+": "+stpf);
- String w = English.intToEnglish(i).trim();
- assertEquals("expecting token "+i+" to be "+w,w,termAtt.toString());
- assertEquals("all but first token must have position increment of 3",enableIcrements?(i==0?1:3):1,posIncrAtt.getPositionIncrement());
- }
- assertFalse(stpf.incrementToken());
- stpf.end();
- stpf.close();
- }
-
- // print debug info depending on VERBOSE
- private static void log(String s) {
- if (VERBOSE) {
- System.out.println(s);
- }
- }
-}
fnp / pylucene.git / blobdiff