package org.apache.lucene.analysis.de;
/**
* 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.StringReader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.CharArraySet;
import org.apache.lucene.analysis.KeywordMarkerFilter;
import org.apache.lucene.analysis.LowerCaseTokenizer;
import org.apache.lucene.util.Version;
public class TestGermanAnalyzer extends BaseTokenStreamTestCase {
public void testReusableTokenStream() throws Exception {
Analyzer a = new GermanAnalyzer(TEST_VERSION_CURRENT);
checkOneTermReuse(a, "Tisch", "tisch");
checkOneTermReuse(a, "Tische", "tisch");
checkOneTermReuse(a, "Tischen", "tisch");
}
public void testExclusionTableBWCompat() throws IOException {
GermanStemFilter filter = new GermanStemFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT,
new StringReader("Fischen Trinken")));
CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
set.add("fischen");
filter.setExclusionSet(set);
assertTokenStreamContents(filter, new String[] { "fischen", "trink" });
}
public void testWithKeywordAttribute() throws IOException {
CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
set.add("fischen");
GermanStemFilter filter = new GermanStemFilter(
new KeywordMarkerFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader(
"Fischen Trinken")), set));
assertTokenStreamContents(filter, new String[] { "fischen", "trink" });
}
public void testWithKeywordAttributeAndExclusionTable() throws IOException {
CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
set.add("fischen");
CharArraySet set1 = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
set1.add("trinken");
set1.add("fischen");
GermanStemFilter filter = new GermanStemFilter(
new KeywordMarkerFilter(new LowerCaseTokenizer(TEST_VERSION_CURRENT, new StringReader(
"Fischen Trinken")), set));
filter.setExclusionSet(set1);
assertTokenStreamContents(filter, new String[] { "fischen", "trinken" });
}
/*
* Test that changes to the exclusion table are applied immediately
* when using reusable token streams.
*/
public void testExclusionTableReuse() throws Exception {
GermanAnalyzer a = new GermanAnalyzer(TEST_VERSION_CURRENT);
checkOneTermReuse(a, "tischen", "tisch");
a.setStemExclusionTable(new String[] { "tischen" });
checkOneTermReuse(a, "tischen", "tischen");
}
/** test some features of the new snowball filter
* these only pass with LUCENE_CURRENT, not if you use o.a.l.a.de.GermanStemmer
*/
public void testGermanSpecials() throws Exception {
GermanAnalyzer a = new GermanAnalyzer(TEST_VERSION_CURRENT);
// a/o/u + e is equivalent to the umlaut form
checkOneTermReuse(a, "Schaltflächen", "schaltflach");
checkOneTermReuse(a, "Schaltflaechen", "schaltflach");
// here they are with the old stemmer
a = new GermanAnalyzer(Version.LUCENE_30);
checkOneTermReuse(a, "Schaltflächen", "schaltflach");
checkOneTermReuse(a, "Schaltflaechen", "schaltflaech");
}
}