/**
* 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 KeepWordFilter}.
* <pre class="prettyprint" >
* <fieldType name="text_keepword" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <tokenizer class="solr.WhitespaceTokenizerFactory"/>
* <filter class="solr.KeepWordFilterFactory" words="keepwords.txt" ignoreCase="false" enablePositionIncrements="false"/>
* </analyzer>
* </fieldType></pre>
* @version $Id: KeepWordFilterFactory.java 1073810 2011-02-23 16:27:55Z koji $
*/
public class KeepWordFilterFactory extends BaseTokenFilterFactory implements ResourceLoaderAware {
@Override
public void init(Map<String,String> args) {
super.init(args);
assureMatchVersion();
}
public void inform(ResourceLoader loader) {
String wordFiles = args.get("words");
ignoreCase = getBoolean("ignoreCase", false);
enablePositionIncrements = getBoolean("enablePositionIncrements",false);
if (wordFiles != null) {
try {
words = getWordSet(loader, wordFiles, ignoreCase);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
private CharArraySet words;
private boolean ignoreCase;
private boolean enablePositionIncrements;
/**
* Set the keep word list.
* NOTE: if ignoreCase==true, the words are expected to be lowercase
*/
public void setWords(Set<String> words) {
this.words = new CharArraySet(luceneMatchVersion, words, ignoreCase);
}
public void setIgnoreCase(boolean ignoreCase) {
if (words != null && this.ignoreCase != ignoreCase) {
words = new CharArraySet(luceneMatchVersion, words, ignoreCase);
}
this.ignoreCase = ignoreCase;
}
public boolean isEnablePositionIncrements() {
return enablePositionIncrements;
}
public boolean isIgnoreCase() {
return ignoreCase;
}
public CharArraySet getWords() {
return words;
}
public KeepWordFilter create(TokenStream input) {
return new KeepWordFilter(enablePositionIncrements, input, words);
}
}