org.apache.lucene.analysis.ru.RussianLetterTokenizer Maven / Gradle / Ivy
package org.apache.lucene.analysis.ru;
/**
* 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.analysis.CharTokenizer;
import org.apache.lucene.analysis.Tokenizer; // for javadocs
import org.apache.lucene.analysis.LetterTokenizer; // for javadocs
import org.apache.lucene.util.AttributeSource;
/**
* A RussianLetterTokenizer is a {@link Tokenizer} that extends {@link LetterTokenizer}
* by also allowing the basic latin digits 0-9.
*/
public class RussianLetterTokenizer extends CharTokenizer
{
public RussianLetterTokenizer(Reader in)
{
super(in);
}
public RussianLetterTokenizer(AttributeSource source, Reader in)
{
super(source, in);
}
public RussianLetterTokenizer(AttributeFactory factory, Reader in)
{
super(factory, in);
}
/**
* Collects only characters which satisfy
* {@link Character#isLetter(char)}.
*/
@Override
protected boolean isTokenChar(char c)
{
if (Character.isLetter(c) || (c >= '0' && c <= '9'))
return true;
else
return false;
}
}