package org.apache.lucene.analysis.core;
/*
* 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.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.util.CharArraySet;
import org.apache.lucene.util.IOUtils;
import org.apache.lucene.util.Version;
import java.io.IOException;
import java.util.Iterator;
import java.util.Set;
import java.util.HashSet;
public class TestStopAnalyzer extends BaseTokenStreamTestCase {
private StopAnalyzer stop = new StopAnalyzer(TEST_VERSION_CURRENT);
private Set<Object> inValidTokens = new HashSet<Object>();
@Override
public void setUp() throws Exception {
super.setUp();
Iterator<?> it = StopAnalyzer.ENGLISH_STOP_WORDS_SET.iterator();
while(it.hasNext()) {
inValidTokens.add(it.next());
}
}
public void testDefaults() throws IOException {
assertTrue(stop != null);
TokenStream stream = stop.tokenStream("test", "This is a test of the english stop analyzer");
try {
assertTrue(stream != null);
CharTermAttribute termAtt = stream.getAttribute(CharTermAttribute.class);
stream.reset();
while (stream.incrementToken()) {
assertFalse(inValidTokens.contains(termAtt.toString()));
}
stream.end();
} finally {
IOUtils.closeWhileHandlingException(stream);
}
}
public void testStopList() throws IOException {
CharArraySet stopWordsSet = new CharArraySet(TEST_VERSION_CURRENT, asSet("good", "test", "analyzer"), false);
StopAnalyzer newStop = new StopAnalyzer(TEST_VERSION_CURRENT, stopWordsSet);
TokenStream stream = newStop.tokenStream("test", "This is a good test of the english stop analyzer");
try {
assertNotNull(stream);
CharTermAttribute termAtt = stream.getAttribute(CharTermAttribute.class);
stream.reset();
while (stream.incrementToken()) {
String text = termAtt.toString();
assertFalse(stopWordsSet.contains(text));
}
stream.end();
} finally {
IOUtils.closeWhileHandlingException(stream);
}
}
public void testStopListPositions() throws IOException {
CharArraySet stopWordsSet = new CharArraySet(TEST_VERSION_CURRENT, asSet("good", "test", "analyzer"), false);
StopAnalyzer newStop = new StopAnalyzer(TEST_VERSION_CURRENT, stopWordsSet);
String s = "This is a good test of the english stop analyzer with positions";
int expectedIncr[] = { 1, 1, 1, 3, 1, 1, 1, 2, 1};
TokenStream stream = newStop.tokenStream("test", s);
try {
assertNotNull(stream);
int i = 0;
CharTermAttribute termAtt = stream.getAttribute(CharTermAttribute.class);
PositionIncrementAttribute posIncrAtt = stream.addAttribute(PositionIncrementAttribute.class);
stream.reset();
while (stream.incrementToken()) {
String text = termAtt.toString();
assertFalse(stopWordsSet.contains(text));
assertEquals(expectedIncr[i++],posIncrAtt.getPositionIncrement());
}
stream.end();
} finally {
IOUtils.closeWhileHandlingException(stream);
}
}
}