MonoRail/Castle.MonoRail.Views.Brail/ResourceToDuck.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.Views.Brail
  16 {
  17         using System.Collections;
  18         using Boo.Lang;
  19         using Castle.MonoRail.Framework.Resources;
  20         using Framework;
  21
  22         // This allows to treat resources in a natural way:
  23         //      text.Hello
  24         // Instead of:
  25         //      text["Hello"]
  26         public class ResourceToDuck : IQuackFu, IEnumerable
  27         {
  28                 private IResource resource;
  29
  30                 public ResourceToDuck(IResource resource)
  31                 {
  32                         this.resource = resource;
  33                 }
  34
  35                 #region IEnumerable Members
  36
  37                 public IEnumerator GetEnumerator()
  38                 {
  39                         return resource.GetEnumerator();
  40                 }
  41
  42                 #endregion
  43
  44                 #region IQuackFu Members
  45
  46                 public object QuackGet(string name, object[] parameters)
  47                 {
  48                         if (IsStringIndexer(name, parameters))
  49                         {
  50                                 name = (string) parameters[0];
  51                         }
  52                         object val = resource.GetObject(name);
  53                         if (val == null)
  54                         {
  55                                 throw new MonoRailException("Resource " + name + " does not exists");
  56                         }
  57                         return val;
  58                 }
  59
  60                 public object QuackSet(string name, object[] parameters, object value)
  61                 {
  62                         throw new MonoRailException("You cannnot set resource " + name);
  63                 }
  64
  65                 public object QuackInvoke(string name, params object[] args)
  66                 {
  67                         throw new MonoRailException("You cannnot invoke resource " + name);
  68                 }
  69
  70                 #endregion
  71
  72                 private static bool IsStringIndexer(string name, object[] parameters)
  73                 {
  74                         return name.Length == 0 && parameters.Length == 1 && parameters[0] is string;
  75                 }
  76         }
  77 }