/**
* 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.
*/
package org.apache.solr.analysis;
import org.apache.solr.common.ResourceLoader;
import org.apache.solr.util.plugin.ResourceLoaderAware;
import org.apache.lucene.analysis.StopFilter;
import org.apache.lucene.analysis.StopAnalyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.CharArraySet;
import java.util.Map;
import java.util.Set;
import java.io.IOException;
/**
* Factory for {@link StopFilter}.
* <pre class="prettyprint" >
* <fieldType name="text_stop" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="true">
* <analyzer>
* <tokenizer class="solr.WhitespaceTokenizerFactory"/>
* <filter class="solr.StopFilterFactory" ignoreCase="true"
* words="stopwords.txt" enablePositionIncrements="true"/>
* </analyzer>
* </fieldType></pre>
* @version $Id: StopFilterFactory.java 1067552 2011-02-05 23:52:42Z koji $
*/
public class StopFilterFactory extends BaseTokenFilterFactory implements ResourceLoaderAware {
@Override
public void init(Map<String,String> args) {
super.init(args);
assureMatchVersion();
}
public void inform(ResourceLoader loader) {
String stopWordFiles = args.get("words");
ignoreCase = getBoolean("ignoreCase",false);
enablePositionIncrements = getBoolean("enablePositionIncrements",false);
if (stopWordFiles != null) {
try {
stopWords = getWordSet(loader, stopWordFiles, ignoreCase);
} catch (IOException e) {
throw new RuntimeException(e);
}
} else {
stopWords = new CharArraySet(luceneMatchVersion, StopAnalyzer.ENGLISH_STOP_WORDS_SET, ignoreCase);
}
}
private CharArraySet stopWords;
private boolean ignoreCase;
private boolean enablePositionIncrements;
public boolean isEnablePositionIncrements() {
return enablePositionIncrements;
}
public boolean isIgnoreCase() {
return ignoreCase;
}
public Set<?> getStopWords() {
return stopWords;
}
public StopFilter create(TokenStream input) {
StopFilter stopFilter = new StopFilter(luceneMatchVersion,input,stopWords,ignoreCase);
stopFilter.setEnablePositionIncrements(enablePositionIncrements);
return stopFilter;
}
}