| using Lucene.Net.Support; |
| using System; |
| |
| namespace Lucene.Net.Store |
| { |
| /* |
| * 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> |
| /// Simple implementation of <see cref="ChecksumIndexInput"/> that wraps |
| /// another input and delegates calls. |
| /// </summary> |
| public class BufferedChecksumIndexInput : ChecksumIndexInput |
| { |
| internal readonly IndexInput main; |
| internal readonly IChecksum digest; |
| |
| /// <summary> |
| /// Creates a new <see cref="BufferedChecksumIndexInput"/> </summary> |
| public BufferedChecksumIndexInput(IndexInput main) |
| : base("BufferedChecksumIndexInput(" + main + ")") |
| { |
| this.main = main; |
| this.digest = new BufferedChecksum(new CRC32()); |
| } |
| |
| public override byte ReadByte() |
| { |
| byte b = main.ReadByte(); |
| digest.Update(b); |
| return b; |
| } |
| |
| public override void ReadBytes(byte[] b, int offset, int len) |
| { |
| main.ReadBytes(b, offset, len); |
| digest.Update(b, offset, len); |
| } |
| |
| public override long Checksum => digest.Value; |
| |
| protected override void Dispose(bool disposing) |
| { |
| if (disposing) |
| { |
| main.Dispose(); |
| } |
| } |
| |
| public override long GetFilePointer() |
| { |
| return main.GetFilePointer(); |
| } |
| |
| public override long Length => main.Length; |
| |
| public override object Clone() |
| { |
| throw new NotSupportedException(); |
| } |
| } |
| } |