Core/Castle.Core/Resource/FileResource.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.Core.Resource
  16 {
  17         using System;
  18         using System.IO;
  19
  20         /// <summary>
  21         ///
  22         /// </summary>
  23         public class FileResource : AbstractStreamResource
  24         {
  25                 private string filePath;
  26                 private String basePath;
  27
  28                 public FileResource(CustomUri resource)
  29                 {
  30                         CreateStream = delegate
  31                         {
  32                                 return CreateStreamFromUri(resource, DefaultBasePath);
  33                         };
  34                 }
  35
  36                 public FileResource(CustomUri resource, String basePath)
  37                 {
  38                         CreateStream = delegate
  39                         {
  40                                 return CreateStreamFromUri(resource, basePath);
  41                         };
  42                 }
  43
  44                 public FileResource(String resourceName)
  45                 {
  46                         CreateStream = delegate
  47                         {
  48                                 return CreateStreamFromPath(resourceName, DefaultBasePath);
  49                         };
  50                 }
  51
  52                 public FileResource(String resourceName, String basePath)
  53                 {
  54                         CreateStream = delegate
  55                         {
  56                                 return CreateStreamFromPath(resourceName, basePath);
  57                         };
  58                 }
  59
  60                 public override string ToString()
  61                 {
  62                         return String.Format("FileResource: [{0}] [{1}]", filePath, basePath);
  63                 }
  64
  65                 public override String FileBasePath
  66                 {
  67                         get { return basePath; }
  68                 }
  69
  70                 public override IResource CreateRelative(String resourceName)
  71                 {
  72                         return new FileResource(resourceName, basePath);
  73                 }
  74
  75                 private Stream CreateStreamFromUri(CustomUri resource, String basePath)
  76                 {
  77                         if (resource == null) throw new ArgumentNullException("resource");
  78                         if (basePath == null) throw new ArgumentNullException("basePath");
  79
  80                         if (!resource.IsFile)
  81                                 throw new ArgumentException("The specified resource is not a file", "resource");
  82
  83                         return CreateStreamFromPath(resource.Path, basePath);
  84                 }
  85
  86                 private Stream CreateStreamFromPath(String filePath, String basePath)
  87                 {
  88                         if (filePath == null)
  89                                 throw new ArgumentNullException("filePath");
  90                         if (basePath == null)
  91                                 throw new ArgumentNullException("basePath");
  92
  93                         if (!Path.IsPathRooted(filePath) || !File.Exists(filePath))
  94                         {
  95                                 // For a relative path, we use the basePath to
  96                                 // resolve the full path
  97
  98                                 filePath = Path.Combine(basePath, filePath);
  99                         }
 100
 101                         CheckFileExists(filePath);
 102
 103                         this.filePath = Path.GetFileName(filePath);
 104                         this.basePath = Path.GetDirectoryName(filePath);
 105
 106                         return File.OpenRead(filePath);
 107                 }
 108
 109                 private static void CheckFileExists(String path)
 110                 {
 111                         if (!File.Exists(path))
 112                         {
 113                                 String message = String.Format("File {0} could not be found", new FileInfo(path).FullName);
 114                                 throw new ResourceException(message);
 115                         }
 116                 }
 117         }
 118 }