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.TokenStream;
import org.apache.lucene.analysis.core.TypeTokenFilter;
import org.apache.lucene.analysis.util.ResourceLoader;
import org.apache.lucene.analysis.util.ResourceLoaderAware;
import org.apache.lucene.analysis.util.TokenFilterFactory;
import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Factory class for {@link TypeTokenFilter}.
* <pre class="prettyprint" >
* <fieldType name="chars" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <tokenizer class="solr.StandardTokenizerFactory"/>
* <filter class="solr.TypeTokenFilterFactory" types="stoptypes.txt"
* enablePositionIncrements="true" useWhiteList="false"/>
* </analyzer>
* </fieldType></pre>
*/
public class TypeTokenFilterFactory extends TokenFilterFactory implements ResourceLoaderAware {
@Override
public void inform(ResourceLoader loader) throws IOException {
String stopTypesFiles = args.get("types");
enablePositionIncrements = getBoolean("enablePositionIncrements", false);
useWhitelist = getBoolean("useWhitelist", false);
if (stopTypesFiles != null) {
List<String> files = splitFileNames(stopTypesFiles);
if (files.size() > 0) {
stopTypes = new HashSet<String>();
for (String file : files) {
List<String> typesLines = getLines(loader, file.trim());
stopTypes.addAll(typesLines);
}
}
} else {
throw new IllegalArgumentException("Missing required parameter: types.");
}
}
private boolean useWhitelist;
private Set<String> stopTypes;
private boolean enablePositionIncrements;
public boolean isEnablePositionIncrements() {
return enablePositionIncrements;
}
public Set<String> getStopTypes() {
return stopTypes;
}
@Override
public TokenStream create(TokenStream input) {
return new TypeTokenFilter(enablePositionIncrements, input, stopTypes, useWhitelist);
}
}