package org.apache.lucene.analysis.ja;
/*
* 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 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.Tokenizer;
import org.apache.lucene.analysis.core.KeywordTokenizer;
import org.apache.lucene.analysis.miscellaneous.KeywordMarkerFilter;
import org.apache.lucene.analysis.util.CharArraySet;
import java.io.IOException;
import java.io.Reader;
/**
* Tests for {@link JapaneseKatakanaStemFilter}
*/
public class TestJapaneseKatakanaStemFilter extends BaseTokenStreamTestCase {
private Analyzer analyzer = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
// Use a MockTokenizer here since this filter doesn't really depend on Kuromoji
Tokenizer source = new MockTokenizer(reader, MockTokenizer.WHITESPACE, false);
return new TokenStreamComponents(source, new JapaneseKatakanaStemFilter(source));
}
};
/**
* Test a few common katakana spelling variations.
* <p>
* English translations are as follows:
* <ul>
* <li>copy</li>
* <li>coffee</li>
* <li>taxi</li>
* <li>party</li>
* <li>party (without long sound)</li>
* <li>center</li>
* </ul>
* Note that we remove a long sound in the case of "coffee" that is required.
* </p>
*/
public void testStemVariants() throws IOException {
assertAnalyzesTo(analyzer, "コピー コーヒー タクシー パーティー パーティ センター",
new String[] { "コピー", "コーヒ", "タクシ", "パーティ", "パーティ", "センタ" },
new int[] { 0, 4, 9, 14, 20, 25 },
new int[] { 3, 8, 13, 19, 24, 29 });
}
public void testKeyword() throws IOException {
final CharArraySet exclusionSet = new CharArraySet(TEST_VERSION_CURRENT, asSet("コーヒー"), false);
Analyzer a = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer source = new MockTokenizer(reader, MockTokenizer.WHITESPACE, false);
TokenStream sink = new KeywordMarkerFilter(source, exclusionSet);
return new TokenStreamComponents(source, new JapaneseKatakanaStemFilter(sink));
}
};
checkOneTerm(a, "コーヒー", "コーヒー");
}
public void testUnsupportedHalfWidthVariants() throws IOException {
// The below result is expected since only full-width katakana is supported
assertAnalyzesTo(analyzer, "ﾀｸｼｰ", new String[] { "ﾀｸｼｰ" });
}
public void testRandomData() throws IOException {
checkRandomData(random(), analyzer, 1000*RANDOM_MULTIPLIER);
}
public void testEmptyTerm() throws IOException {
Analyzer a = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer tokenizer = new KeywordTokenizer(reader);
return new TokenStreamComponents(tokenizer, new JapaneseKatakanaStemFilter(tokenizer));
}
};
checkOneTermReuse(a, "", "");
}
}