package org.apache.lucene.analysis.charfilter;
/*
* 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.charfilter.HTMLStripCharFilter;
import org.apache.lucene.analysis.util.CharFilterFactory;
import java.io.Reader;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Factory for {@link HTMLStripCharFilter}.
* <pre class="prettyprint" >
* <fieldType name="text_html" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <charFilter class="solr.HTMLStripCharFilterFactory" escapedTags="a, title" />
* <tokenizer class="solr.WhitespaceTokenizerFactory"/>
* </analyzer>
* </fieldType></pre>
*
*/
public class HTMLStripCharFilterFactory extends CharFilterFactory {
Set<String> escapedTags = null;
Pattern TAG_NAME_PATTERN = Pattern.compile("[^\\s,]+");
@Override
public HTMLStripCharFilter create(Reader input) {
HTMLStripCharFilter charFilter;
if (null == escapedTags) {
charFilter = new HTMLStripCharFilter(input);
} else {
charFilter = new HTMLStripCharFilter(input, escapedTags);
}
return charFilter;
}
@Override
public void init(Map<String,String> args) {
super.init(args);
String escapedTagsArg = args.get("escapedTags");
if (null != escapedTagsArg) {
Matcher matcher = TAG_NAME_PATTERN.matcher(escapedTagsArg);
while (matcher.find()) {
if (null == escapedTags) {
escapedTags = new HashSet<String>();
}
escapedTags.add(matcher.group(0));
}
}
}
}