package org.apache.lucene.analysis.id;
/**
* 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.IOException;
import java.io.Reader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.KeywordTokenizer;
import org.apache.lucene.analysis.ReusableAnalyzerBase;
import org.apache.lucene.analysis.Tokenizer;
/**
* Tests {@link IndonesianStemmer}
*/
public class TestIndonesianStemmer extends BaseTokenStreamTestCase {
/* full stemming, no stopwords */
Analyzer a = new ReusableAnalyzerBase() {
@Override
public TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer tokenizer = new KeywordTokenizer(reader);
return new TokenStreamComponents(tokenizer, new IndonesianStemFilter(tokenizer));
}
};
/** Some examples from the paper */
public void testExamples() throws IOException {
checkOneTerm(a, "bukukah", "buku");
checkOneTermReuse(a, "adalah", "ada");
checkOneTermReuse(a, "bukupun", "buku");
checkOneTermReuse(a, "bukuku", "buku");
checkOneTermReuse(a, "bukumu", "buku");
checkOneTermReuse(a, "bukunya", "buku");
checkOneTermReuse(a, "mengukur", "ukur");
checkOneTermReuse(a, "menyapu", "sapu");
checkOneTermReuse(a, "menduga", "duga");
checkOneTermReuse(a, "menuduh", "uduh");
checkOneTermReuse(a, "membaca", "baca");
checkOneTermReuse(a, "merusak", "rusak");
checkOneTermReuse(a, "pengukur", "ukur");
checkOneTermReuse(a, "penyapu", "sapu");
checkOneTermReuse(a, "penduga", "duga");
checkOneTermReuse(a, "pembaca", "baca");
checkOneTermReuse(a, "diukur", "ukur");
checkOneTermReuse(a, "tersapu", "sapu");
checkOneTermReuse(a, "kekasih", "kasih");
checkOneTermReuse(a, "berlari", "lari");
checkOneTermReuse(a, "belajar", "ajar");
checkOneTermReuse(a, "bekerja", "kerja");
checkOneTermReuse(a, "perjelas", "jelas");
checkOneTermReuse(a, "pelajar", "ajar");
checkOneTermReuse(a, "pekerja", "kerja");
checkOneTermReuse(a, "tarikkan", "tarik");
checkOneTermReuse(a, "ambilkan", "ambil");
checkOneTermReuse(a, "mengambilkan", "ambil");
checkOneTermReuse(a, "makanan", "makan");
checkOneTermReuse(a, "janjian", "janji");
checkOneTermReuse(a, "perjanjian", "janji");
checkOneTermReuse(a, "tandai", "tanda");
checkOneTermReuse(a, "dapati", "dapat");
checkOneTermReuse(a, "mendapati", "dapat");
checkOneTermReuse(a, "pantai", "panta");
}
/** Some detailed analysis examples (that might not be the best) */
public void testIRExamples() throws IOException {
checkOneTerm(a, "penyalahgunaan", "salahguna");
checkOneTermReuse(a, "menyalahgunakan", "salahguna");
checkOneTermReuse(a, "disalahgunakan", "salahguna");
checkOneTermReuse(a, "pertanggungjawaban", "tanggungjawab");
checkOneTermReuse(a, "mempertanggungjawabkan", "tanggungjawab");
checkOneTermReuse(a, "dipertanggungjawabkan", "tanggungjawab");
checkOneTermReuse(a, "pelaksanaan", "laksana");
checkOneTermReuse(a, "pelaksana", "laksana");
checkOneTermReuse(a, "melaksanakan", "laksana");
checkOneTermReuse(a, "dilaksanakan", "laksana");
checkOneTermReuse(a, "melibatkan", "libat");
checkOneTermReuse(a, "terlibat", "libat");
checkOneTermReuse(a, "penculikan", "culik");
checkOneTermReuse(a, "menculik", "culik");
checkOneTermReuse(a, "diculik", "culik");
checkOneTermReuse(a, "penculik", "culik");
checkOneTermReuse(a, "perubahan", "ubah");
checkOneTermReuse(a, "peledakan", "ledak");
checkOneTermReuse(a, "penanganan", "tangan");
checkOneTermReuse(a, "kepolisian", "polisi");
checkOneTermReuse(a, "kenaikan", "naik");
checkOneTermReuse(a, "bersenjata", "senjata");
checkOneTermReuse(a, "penyelewengan", "seleweng");
checkOneTermReuse(a, "kecelakaan", "celaka");
}
/* inflectional-only stemming */
Analyzer b = new ReusableAnalyzerBase() {
@Override
public TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer tokenizer = new KeywordTokenizer(reader);
return new TokenStreamComponents(tokenizer, new IndonesianStemFilter(tokenizer, false));
}
};
/** Test stemming only inflectional suffixes */
public void testInflectionalOnly() throws IOException {
checkOneTerm(b, "bukunya", "buku");
checkOneTermReuse(b, "bukukah", "buku");
checkOneTermReuse(b, "bukunyakah", "buku");
checkOneTermReuse(b, "dibukukannya", "dibukukan");
}
public void testShouldntStem() throws IOException {
checkOneTerm(a, "bersenjata", "senjata");
checkOneTermReuse(a, "bukukah", "buku");
checkOneTermReuse(a, "gigi", "gigi");
}
public void testEmptyTerm() throws IOException {
Analyzer a = new ReusableAnalyzerBase() {
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer tokenizer = new KeywordTokenizer(reader);
return new TokenStreamComponents(tokenizer, new IndonesianStemFilter(tokenizer));
}
};
checkOneTermReuse(a, "", "");
}
}