org.apache.solr.analysis.EnglishPorterFilterFactory Maven / Gradle / Ivy
/**
* 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.lucene.analysis.CharArraySet;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.solr.common.ResourceLoader;
import org.apache.solr.common.util.StrUtils;
import org.apache.solr.util.plugin.ResourceLoaderAware;
import org.tartarus.snowball.SnowballProgram;
import java.io.IOException;
import java.io.File;
import java.util.List;
/**
* @version $Id: EnglishPorterFilterFactory.java 804726 2009-08-16 17:28:58Z yonik $
*
* @deprecated Use SnowballPorterFilterFactory with language="English" instead
*/
public class EnglishPorterFilterFactory extends BaseTokenFilterFactory implements ResourceLoaderAware {
public static final String PROTECTED_TOKENS = "protected";
public void inform(ResourceLoader loader) {
String wordFiles = args.get(PROTECTED_TOKENS);
if (wordFiles != null) {
try {
File protectedWordFiles = new File(wordFiles);
if (protectedWordFiles.exists()) {
List wlist = loader.getLines(wordFiles);
//This cast is safe in Lucene
protectedWords = new CharArraySet(wlist, false);//No need to go through StopFilter as before, since it just uses a List internally
} else {
List files = StrUtils.splitFileNames(wordFiles);
for (String file : files) {
List wlist = loader.getLines(file.trim());
if (protectedWords == null)
protectedWords = new CharArraySet(wlist, false);
else
protectedWords.addAll(wlist);
}
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
private CharArraySet protectedWords = null;
public EnglishPorterFilter create(TokenStream input) {
return new EnglishPorterFilter(input, protectedWords);
}
}
/**
* English Porter2 filter that doesn't use reflection to
* adapt lucene to the snowball stemmer code.
*/
@Deprecated
class EnglishPorterFilter extends SnowballPorterFilter {
public EnglishPorterFilter(TokenStream source, CharArraySet protWords) {
super(source, new org.tartarus.snowball.ext.EnglishStemmer(), protWords);
}
}