+++ /dev/null
-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.IOException;
-
-import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
-import org.apache.lucene.util.CharacterUtils;
-import org.apache.lucene.util.Version;
-
-/**
- * Normalizes token text to lower case.
- * <a name="version"/>
- * <p>You must specify the required {@link Version}
- * compatibility when creating LowerCaseFilter:
- * <ul>
- * <li> As of 3.1, supplementary characters are properly lowercased.
- * </ul>
- */
-public final class LowerCaseFilter extends TokenFilter {
- private final CharacterUtils charUtils;
- private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
-
- /**
- * Create a new LowerCaseFilter, that normalizes token text to lower case.
- *
- * @param matchVersion See <a href="#version">above</a>
- * @param in TokenStream to filter
- */
- public LowerCaseFilter(Version matchVersion, TokenStream in) {
- super(in);
- charUtils = CharacterUtils.getInstance(matchVersion);
- }
-
- /**
- * @deprecated Use {@link #LowerCaseFilter(Version, TokenStream)} instead.
- */
- @Deprecated
- public LowerCaseFilter(TokenStream in) {
- this(Version.LUCENE_30, in);
- }
-
- @Override
- public final boolean incrementToken() throws IOException {
- if (input.incrementToken()) {
- final char[] buffer = termAtt.buffer();
- final int length = termAtt.length();
- for (int i = 0; i < length;) {
- i += Character.toChars(
- Character.toLowerCase(
- charUtils.codePointAt(buffer, i)), buffer, i);
- }
- return true;
- } else
- return false;
- }
-}