package org.apache.lucene.analysis.nl;
/**
* 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.
*/
import java.io.File;
import java.io.IOException;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.util.CharArraySet;
import org.apache.lucene.util.Version;
/**
* Test the Dutch Stem Filter, which only modifies the term text.
*
* The code states that it uses the snowball algorithm, but tests reveal some differences.
*
*/
public class TestDutchStemmer extends BaseTokenStreamTestCase {
public void testWithSnowballExamples() throws Exception {
check("lichaamsziek", "lichaamsziek");
check("lichamelijk", "licham");
check("lichamelijke", "licham");
check("lichamelijkheden", "licham");
check("lichamen", "licham");
check("lichere", "licher");
check("licht", "licht");
check("lichtbeeld", "lichtbeeld");
check("lichtbruin", "lichtbruin");
check("lichtdoorlatende", "lichtdoorlat");
check("lichte", "licht");
check("lichten", "licht");
check("lichtende", "lichtend");
check("lichtenvoorde", "lichtenvoord");
check("lichter", "lichter");
check("lichtere", "lichter");
check("lichters", "lichter");
check("lichtgevoeligheid", "lichtgevoel");
check("lichtgewicht", "lichtgewicht");
check("lichtgrijs", "lichtgrijs");
check("lichthoeveelheid", "lichthoevel");
check("lichtintensiteit", "lichtintensiteit");
check("lichtje", "lichtj");
check("lichtjes", "lichtjes");
check("lichtkranten", "lichtkrant");
check("lichtkring", "lichtkring");
check("lichtkringen", "lichtkring");
check("lichtregelsystemen", "lichtregelsystem");
check("lichtste", "lichtst");
check("lichtstromende", "lichtstrom");
check("lichtte", "licht");
check("lichtten", "licht");
check("lichttoetreding", "lichttoetred");
check("lichtverontreinigde", "lichtverontreinigd");
check("lichtzinnige", "lichtzinn");
check("lid", "lid");
check("lidia", "lidia");
check("lidmaatschap", "lidmaatschap");
check("lidstaten", "lidstat");
check("lidvereniging", "lidveren");
check("opgingen", "opging");
check("opglanzing", "opglanz");
check("opglanzingen", "opglanz");
check("opglimlachten", "opglimlacht");
check("opglimpen", "opglimp");
check("opglimpende", "opglimp");
check("opglimping", "opglimp");
check("opglimpingen", "opglimp");
check("opgraven", "opgrav");
check("opgrijnzen", "opgrijnz");
check("opgrijzende", "opgrijz");
check("opgroeien", "opgroei");
check("opgroeiende", "opgroei");
check("opgroeiplaats", "opgroeiplat");
check("ophaal", "ophal");
check("ophaaldienst", "ophaaldienst");
check("ophaalkosten", "ophaalkost");
check("ophaalsystemen", "ophaalsystem");
check("ophaalt", "ophaalt");
check("ophaaltruck", "ophaaltruck");
check("ophalen", "ophal");
check("ophalend", "ophal");
check("ophalers", "ophaler");
check("ophef", "ophef");
check("opheldering", "ophelder");
check("ophemelde", "ophemeld");
check("ophemelen", "ophemel");
check("opheusden", "opheusd");
check("ophief", "ophief");
check("ophield", "ophield");
check("ophieven", "ophiev");
check("ophoepelt", "ophoepelt");
check("ophoog", "ophog");
check("ophoogzand", "ophoogzand");
check("ophopen", "ophop");
check("ophoping", "ophop");
check("ophouden", "ophoud");
}
/**
* @deprecated remove this test in Lucene 4.0
*/
@Deprecated
public void testOldBuggyStemmer() throws Exception {
Analyzer a = new DutchAnalyzer(Version.LUCENE_30);
checkOneTermReuse(a, "opheffen", "ophef"); // versus snowball 'opheff'
checkOneTermReuse(a, "opheffende", "ophef"); // versus snowball 'opheff'
checkOneTermReuse(a, "opheffing", "ophef"); // versus snowball 'opheff'
}
public void testSnowballCorrectness() throws Exception {
Analyzer a = new DutchAnalyzer(TEST_VERSION_CURRENT);
checkOneTermReuse(a, "opheffen", "opheff");
checkOneTermReuse(a, "opheffende", "opheff");
checkOneTermReuse(a, "opheffing", "opheff");
}
public void testReusableTokenStream() throws Exception {
Analyzer a = new DutchAnalyzer(TEST_VERSION_CURRENT);
checkOneTermReuse(a, "lichaamsziek", "lichaamsziek");
checkOneTermReuse(a, "lichamelijk", "licham");
checkOneTermReuse(a, "lichamelijke", "licham");
checkOneTermReuse(a, "lichamelijkheden", "licham");
}
/*
* Test that changes to the exclusion table are applied immediately
* when using reusable token streams.
*/
public void testExclusionTableReuse() throws Exception {
DutchAnalyzer a = new DutchAnalyzer(TEST_VERSION_CURRENT);
checkOneTermReuse(a, "lichamelijk", "licham");
a.setStemExclusionTable(new String[] { "lichamelijk" });
checkOneTermReuse(a, "lichamelijk", "lichamelijk");
}
public void testExclusionTableViaCtor() throws IOException {
CharArraySet set = new CharArraySet(Version.LUCENE_30, 1, true);
set.add("lichamelijk");
DutchAnalyzer a = new DutchAnalyzer(TEST_VERSION_CURRENT, CharArraySet.EMPTY_SET, set);
assertAnalyzesToReuse(a, "lichamelijk lichamelijke", new String[] { "lichamelijk", "licham" });
a = new DutchAnalyzer(TEST_VERSION_CURRENT, CharArraySet.EMPTY_SET, set);
assertAnalyzesTo(a, "lichamelijk lichamelijke", new String[] { "lichamelijk", "licham" });
}
/*
* Test that changes to the dictionary stemming table are applied immediately
* when using reusable token streams.
*/
public void testStemDictionaryReuse() throws Exception {
DutchAnalyzer a = new DutchAnalyzer(TEST_VERSION_CURRENT);
checkOneTermReuse(a, "lichamelijk", "licham");
File customDictFile = getDataFile("customStemDict.txt");
a.setStemDictionary(customDictFile);
checkOneTermReuse(a, "lichamelijk", "somethingentirelydifferent");
}
/**
* Prior to 3.1, this analyzer had no lowercase filter.
* stopwords were case sensitive. Preserve this for back compat.
* @deprecated Remove this test in Lucene 4.0
*/
@Deprecated
public void testBuggyStopwordsCasing() throws IOException {
DutchAnalyzer a = new DutchAnalyzer(Version.LUCENE_30);
assertAnalyzesTo(a, "Zelf", new String[] { "zelf" });
}
/**
* Test that stopwords are not case sensitive
*/
public void testStopwordsCasing() throws IOException {
DutchAnalyzer a = new DutchAnalyzer(Version.LUCENE_31);
assertAnalyzesTo(a, "Zelf", new String[] { });
}
private void check(final String input, final String expected) throws Exception {
checkOneTerm(new DutchAnalyzer(TEST_VERSION_CURRENT), input, expected);
}
}