2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
20 namespace Mono.Lucene.Net.Store
23 /// <summary>Writes bytes through to a primary IndexOutput, computing
24 /// checksum as it goes. Note that you cannot use seek().
26 public class ChecksumIndexInput:IndexInput
28 internal IndexInput main;
29 internal SupportClass.Checksum digest;
31 public ChecksumIndexInput(IndexInput main)
34 digest = new SupportClass.CRC32();
37 public override byte ReadByte()
39 byte b = main.ReadByte();
44 public override void ReadBytes(byte[] b, int offset, int len)
46 main.ReadBytes(b, offset, len);
47 digest.Update(b, offset, len);
51 public virtual long GetChecksum()
53 return digest.GetValue();
56 public override void Close()
61 public override long GetFilePointer()
63 return main.GetFilePointer();
66 public override void Seek(long pos)
68 throw new System.SystemException("not allowed");
71 public override long Length()
77 override public System.Object Clone()