1 package org.apache.lucene.analysis;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
20 import java.io.Reader;
22 import org.apache.lucene.util.Version;
24 /** An {@link Analyzer} that filters {@link LetterTokenizer}
25 * with {@link LowerCaseFilter}
27 * <a name="version">You must specify the required {@link Version} compatibility
28 * when creating {@link CharTokenizer}:
30 * <li>As of 3.1, {@link LowerCaseTokenizer} uses an int based API to normalize and
31 * detect token codepoints. See {@link CharTokenizer#isTokenChar(int)} and
32 * {@link CharTokenizer#normalize(int)} for details.</li>
36 public final class SimpleAnalyzer extends ReusableAnalyzerBase {
38 private final Version matchVersion;
41 * Creates a new {@link SimpleAnalyzer}
42 * @param matchVersion Lucene version to match See {@link <a href="#version">above</a>}
44 public SimpleAnalyzer(Version matchVersion) {
45 this.matchVersion = matchVersion;
49 * Creates a new {@link SimpleAnalyzer}
50 * @deprecated use {@link #SimpleAnalyzer(Version)} instead
52 @Deprecated public SimpleAnalyzer() {
53 this(Version.LUCENE_30);
56 protected TokenStreamComponents createComponents(final String fieldName,
57 final Reader reader) {
58 return new TokenStreamComponents(new LowerCaseTokenizer(matchVersion, reader));