SnowballPorterFilterFactory.java

/**
 * 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 com.manning.hsia.dvdstore.util;

import java.util.Map;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.snowball.SnowballFilter;
import org.apache.solr.analysis.BaseTokenFilterFactory;

/**
 * Factory for SnowballFilters, with configurable language
 * 
 * Browsing the code, SnowballFilter uses reflection to adapt to Lucene... don't
 * use this if you are concerned about speed. Use EnglishPorterFilterFactory.
 * 
 * This code comes from Apache Solr branch 1.2
 * FIXME: remove when Solr 1.3 and Lucene 2.4 are released.
 * 
 * @author yonik
 * @version $Id$
 */
public class SnowballPorterFilterFactory extends BaseTokenFilterFactory {
	private String language = "English";

	@Override
	public void init(Map<String, String> args) {
		super.init(args);
		final String cfgLanguage = args.get("language");
		if (cfgLanguage != null)
			language = cfgLanguage;
	}

	public TokenStream create(TokenStream input) {
		return new SnowballFilter(input, language);
	}
}