/* * Copyright 2004 The Apache Software Foundation * * Licensed 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. */ using System; namespace Lucene.Net.Analysis { /// A LetterTokenizer is a tokenizer that divides text at non-letters. That's /// to say, it defines tokens as maximal strings of adjacent letters, as defined /// by java.lang.Character.isLetter() predicate. /// Note: this does a decent job for most European languages, but does a terrible /// job for some Asian languages, where words are not separated by spaces. /// public class LetterTokenizer : CharTokenizer { /// Construct a new LetterTokenizer. public LetterTokenizer(System.IO.TextReader in_Renamed) : base(in_Renamed) { } /// Collects only characters which satisfy /// {@link Character#isLetter(char)}. /// protected internal override bool IsTokenChar(char c) { return System.Char.IsLetter(c); } } }