MonoRail/Castle.MonoRail.Framework/Resources/DefaultResourceFactory.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.MonoRail.Framework.Resources
  16 {
  17         using System;
  18         using System.Globalization;
  19         using System.Reflection;
  20         using System.Resources;
  21         using Castle.Core.Logging;
  22         using Core;
  23         using Descriptors;
  24
  25         /// <summary>
  26         /// Standard implementation of <see cref="IResourceFactory" />
  27         /// </summary>
  28         public class DefaultResourceFactory : IServiceEnabledComponent, IResourceFactory
  29         {
  30                 /// <summary>
  31                 /// The logger instance
  32                 /// </summary>
  33                 private ILogger logger = NullLogger.Instance;
  34
  35                 #region IServiceEnabledComponent implementation
  36
  37                 /// <summary>
  38                 /// Invoked by the framework in order to give a chance to
  39                 /// obtain other services
  40                 /// </summary>
  41                 /// <param name="provider">The service proviver</param>
  42                 public void Service(IServiceProvider provider)
  43                 {
  44                         ILoggerFactory loggerFactory = (ILoggerFactory) provider.GetService(typeof(ILoggerFactory));
  45
  46                         if (loggerFactory != null)
  47                         {
  48                                 logger = loggerFactory.Create(typeof(DefaultResourceFactory));
  49                         }
  50                 }
  51
  52                 #endregion
  53
  54                 /// <summary>
  55                 /// Creates an implementation of <see cref="IResource"/>
  56                 /// based on the descriptor.
  57                 /// <seealso cref="ResourceManager"/>
  58                 /// <seealso cref="ResourceFacade"/>
  59                 /// </summary>
  60                 /// <param name="descriptor"></param>
  61                 /// <param name="appAssembly"></param>
  62                 /// <returns></returns>
  63                 public IResource Create(ResourceDescriptor descriptor, Assembly appAssembly)
  64                 {
  65                         Assembly assembly = ResolveAssembly(descriptor.AssemblyName, appAssembly);
  66                         CultureInfo cultureInfo = ResolveCulture(descriptor.CultureName);
  67
  68                         if (logger.IsDebugEnabled)
  69                         {
  70                                 logger.DebugFormat("Creating resource name {0}, assembly {1}, resource {2}",
  71                                                    descriptor.Name, descriptor.AssemblyName, descriptor.ResourceName);
  72                         }
  73
  74                         ResourceManager manager = new ResourceManager(descriptor.ResourceName, assembly, descriptor.ResourceType);
  75                         return new ResourceFacade(manager, cultureInfo);
  76                 }
  77
  78                 /// <summary>
  79                 /// Resolves the culture by name.
  80                 /// </summary>
  81                 /// <param name="name">The name.</param>
  82                 /// <returns></returns>
  83                 private CultureInfo ResolveCulture(String name)
  84                 {
  85                         if (logger.IsDebugEnabled)
  86                         {
  87                                 logger.DebugFormat("Resolving culture {0}", name);
  88                         }
  89
  90                         if ("neutral".Equals(name))
  91                         {
  92                                 return CultureInfo.InvariantCulture;
  93                         }
  94                         else if (name != null)
  95                         {
  96                                 return CultureInfo.CreateSpecificCulture(name);
  97                         }
  98
  99                         return CultureInfo.CurrentCulture;
 100                 }
 101
 102                 /// <summary>
 103                 /// Resolves the assembly.
 104                 /// </summary>
 105                 /// <param name="name">The name.</param>
 106                 /// <param name="assembly">The assembly.</param>
 107                 /// <returns></returns>
 108                 private Assembly ResolveAssembly(String name, Assembly assembly)
 109                 {
 110                         if (name == null) return assembly;
 111
 112                         if (logger.IsDebugEnabled)
 113                         {
 114                                 logger.DebugFormat("Resolving assembly {0}", name);
 115                         }
 116
 117                         try
 118                         {
 119                                 return Assembly.Load(name);
 120                         }
 121                         catch(Exception ex)
 122                         {
 123                                 logger.Error("Could not load assembly", ex);
 124
 125                                 throw;
 126                         }
 127                 }
 128         }
 129 }