java source code of AnnotationAnalyzer

/*
 * 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.plugin.analysis.annotation;

import java.io.Reader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.core.LowerCaseFilter;
import org.apache.lucene.analysis.core.WhitespaceTokenizer;
import org.apache.lucene.util.Version;

/**
 * Analyzer for inline annotations composed of WhitespaceTokenizer, LowerCaseFilter,
 * and InlineAnnotationFilter (default settings).
 * 
 * @author Michal Samek, samek.michal @ gmail.com
 *
 */
public class AnnotationAnalyzer extends Analyzer {

	private final Version version;
	
	public AnnotationAnalyzer(Version version) {
		this.version = version;
	}


	@Override
	protected TokenStreamComponents createComponents(String fieldName,
			Reader reader) {
		Tokenizer source = new WhitespaceTokenizer(version, reader);
		TokenStream filter = new LowerCaseFilter(version, source);
		filter = new InlineAnnotationFilter(filter);
		
		return new TokenStreamComponents(source, filter);
	}
	
}