Experiments/SubversionHooks/Hooks/ReadOnlyStreamWrapper.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.SvnHooks
  16 {
  17         using System;
  18         using System.IO;
  19
  20         /// <summary>
  21         /// Summary description for ReadOnlyStreamWrapper.
  22         /// </summary>
  23         public class ReadOnlyStreamWrapper : Stream
  24         {
  25                 public ReadOnlyStreamWrapper(Stream source)
  26                 {
  27                         if (!source.CanRead)
  28                                 throw new ArgumentException("Source stream must be readable", "source");
  29
  30                         this.Source = source;
  31                 }
  32
  33
  34                 public override int Read(byte[] buffer, int offset, int count)
  35                 {
  36                         return Source.Read(buffer, offset, count);
  37                 }
  38
  39                 public override long Seek(long offset, SeekOrigin origin)
  40                 {
  41                         return Source.Seek(offset, origin);
  42                 }
  43
  44
  45                 public override long Length
  46                 {
  47                         get
  48                         {
  49                                 return Source.Length;
  50                         }
  51                 }
  52
  53                 public override long Position
  54                 {
  55                         get
  56                         {
  57                                 return Source.Position;
  58                         }
  59                         set
  60                         {
  61                                 Source.Position = value;
  62                         }
  63                 }
  64
  65                 public override bool CanSeek
  66                 {
  67                         get
  68                         {
  69                                 return Source.CanSeek;
  70                         }
  71                 }
  72
  73
  74                 public override bool CanRead
  75                 {
  76                         get
  77                         {
  78                                 return true;
  79                         }
  80                 }
  81
  82                 public override bool CanWrite
  83                 {
  84                         get
  85                         {
  86                                 return false;
  87                         }
  88                 }
  89
  90
  91                 #region Write related overrides
  92
  93                 public override void Flush()
  94                 {
  95                 }
  96
  97                 public override void SetLength(long value)
  98                 {
  99                         throw new InvalidOperationException();
 100                 }
 101
 102                 public override void Write(byte[] buffer, int offset, int count)
 103                 {
 104                         throw new InvalidOperationException();
 105                 }
 106
 107
 108                 #endregion
 109
 110                 private readonly Stream Source;
 111         }
 112 }