org.apache.lucene.analysis.charfilter.HTMLStripCharFilterFactory Maven / Gradle / Ivy

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Infinispan Embedded Query All-in-One module

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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.util.CharFilterFactory;

import java.io.Reader;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;

/**
 * Factory for {@link HTMLStripCharFilter}. 
 *  * <fieldType name="text_html" class="solr.TextField" positionIncrementGap="100">
 *   <analyzer>
 *     <charFilter class="solr.HTMLStripCharFilterFactory" escapedTags="a, title" />
 *     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
 *   </analyzer>
 * </fieldType>
 */
public class HTMLStripCharFilterFactory extends CharFilterFactory {
  final Set escapedTags;
  static final Pattern TAG_NAME_PATTERN = Pattern.compile("[^\\s,]+");
  
  /** Creates a new HTMLStripCharFilterFactory */
  public HTMLStripCharFilterFactory(Map args) {
    super(args);
    escapedTags = getSet(args, "escapedTags");
    if (!args.isEmpty()) {
      throw new IllegalArgumentException("Unknown parameters: " + args);
    }
  }

  @Override
  public HTMLStripCharFilter create(Reader input) {
    HTMLStripCharFilter charFilter;
    if (null == escapedTags) {
      charFilter = new HTMLStripCharFilter(input);
    } else {
      charFilter = new HTMLStripCharFilter(input, escapedTags);
    }
    return charFilter;
  }
}