| using System; |
| |
| namespace Lucene.Net.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. |
| */ |
| |
| /// <summary> |
| /// Internal class to enable reuse of the string reader by <see cref="Analyzer.GetTokenStream(string, string)"/> |
| /// </summary> |
| public sealed class ReusableStringReader : System.IO.TextReader |
| { |
| private int pos = 0, size = 0; |
| private string s = null; |
| |
| internal void SetValue(string s) |
| { |
| this.s = s; |
| this.size = s.Length; |
| this.pos = 0; |
| } |
| |
| public override int Read() |
| { |
| if (pos < size) |
| { |
| return s[pos++]; |
| } |
| else |
| { |
| s = null; |
| return -1; |
| } |
| } |
| |
| public override int Read(char[] c, int off, int len) |
| { |
| if (pos < size) |
| { |
| len = Math.Min(len, size - pos); |
| s.CopyTo(pos, c, off, pos + len - pos); |
| pos += len; |
| return len; |
| } |
| else |
| { |
| s = null; |
| return -1; |
| } |
| } |
| |
| // LUCENENET-150: ReadToEnd() method required for .NET |
| public override string ReadToEnd() |
| { |
| if (pos < size) |
| { |
| string result = s.Substring(pos); |
| pos = size; |
| return result; |
| } |
| return null; |
| } |
| |
| protected override void Dispose(bool disposing) |
| { |
| pos = size; // this prevents NPE when reading after close! |
| s = null; |
| |
| base.Dispose(disposing); |
| } |
| } |
| } |