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Lucene example source code file (SimpleAnalyzer.java)

This example Lucene source code file (SimpleAnalyzer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

deprecated, io, lowercasetokenizer, override, reader, reader, reusableanalyzerbase, reusableanalyzerbase, simpleanalyzer, simpleanalyzer, string, tokenstreamcomponents, tokenstreamcomponents, version

The Lucene SimpleAnalyzer.java source code

package org.apache.lucene.analysis;

/**
 * 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 java.io.Reader;

import org.apache.lucene.util.Version;

/** An {@link Analyzer} that filters {@link LetterTokenizer} 
 *  with {@link LowerCaseFilter} 
 * <p>
 * <a name="version">You must specify the required {@link Version} compatibility
 * when creating {@link CharTokenizer}:
 * <ul>
 * <li>As of 3.1, {@link LowerCaseTokenizer} uses an int based API to normalize and
 * detect token codepoints. See {@link CharTokenizer#isTokenChar(int)} and
 * {@link CharTokenizer#normalize(int)} for details.</li>
 * </ul>
 * <p>
 **/
public final class SimpleAnalyzer extends ReusableAnalyzerBase {

  private final Version matchVersion;
  
  /**
   * Creates a new {@link SimpleAnalyzer}
   * @param matchVersion Lucene version to match See {@link <a href="#version">above}
   */
  public SimpleAnalyzer(Version matchVersion) {
    this.matchVersion = matchVersion;
  }
  
  /**
   * Creates a new {@link SimpleAnalyzer}
   * @deprecated use {@link #SimpleAnalyzer(Version)} instead 
   */
  @Deprecated  public SimpleAnalyzer() {
    this(Version.LUCENE_30);
  }
  @Override
  protected TokenStreamComponents createComponents(final String fieldName,
      final Reader reader) {
    return new TokenStreamComponents(new LowerCaseTokenizer(matchVersion, reader));
  }
}

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