StandardHtmlStripAnalyzer.java

/*
 * Licensed to ElasticSearch and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. ElasticSearch 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.elasticsearch.index.analysis;

import org.apache.lucene.analysis.*;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.analysis.standard.StandardFilter;
import org.apache.lucene.analysis.standard.StandardTokenizer;
import org.apache.lucene.util.Version;

import java.io.IOException;
import java.io.Reader;

public class StandardHtmlStripAnalyzer extends StopwordAnalyzerBase {

    public StandardHtmlStripAnalyzer(Version version) {
        super(version, StopAnalyzer.ENGLISH_STOP_WORDS_SET);
    }

    @Override
    protected TokenStreamComponents createComponents(final String fieldName, final Reader reader) {
        final StandardTokenizer src = new StandardTokenizer(matchVersion, reader);
        src.setMaxTokenLength(StandardAnalyzer.DEFAULT_MAX_TOKEN_LENGTH);
        TokenStream tok = new StandardFilter(matchVersion, src);
        tok = new LowerCaseFilter(matchVersion, tok);
        tok = new StopFilter(matchVersion, tok, stopwords);
        return new TokenStreamComponents(src, tok) {
            @Override
            protected boolean reset(final Reader reader) throws IOException {
                src.setMaxTokenLength(StandardAnalyzer.DEFAULT_MAX_TOKEN_LENGTH);
                return super.reset(reader);
            }
        };
    }

}