MonoRail/Castle.MonoRail.Views.Brail/ResourceToDuck.cs

   1 // Copyright 2004-2007 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 using System;
  16 using System.Text;
  17
  18 namespace Castle.MonoRail.Views.Brail
  19 {
  20         using System.Collections;
  21         using Boo.Lang;
  22         using Castle.MonoRail.Framework;
  23
  24         // This allows to treat resources in a natural way:
  25         //      text.Hello
  26         // Instead of:
  27         //      text["Hello"]
  28         public class ResourceToDuck : IQuackFu, IEnumerable
  29         {
  30                 IResource resource;
  31
  32                 public ResourceToDuck(IResource resource)
  33                 {
  34                         this.resource = resource;
  35                 }
  36
  37
  38         public object QuackGet(string name, object[] parameters)
  39                 {
  40                         if(IsStringIndexer(name, parameters))
  41                         {
  42                                 name = (string) parameters[0];
  43                         }
  44                         object val = resource.GetObject(name);
  45                         if(val==null)
  46                         {
  47                                 throw new RailsException("Resource "+name+" does not exists");
  48                         }
  49                         return val;
  50                 }
  51
  52                 private static bool IsStringIndexer(string name, object[] parameters)
  53                 {
  54                         return name.Length==0 && parameters.Length==1 && parameters[0] is string;
  55                 }
  56
  57                 public object QuackSet(string name, object[] parameters, object value)
  58                 {
  59                         throw new RailsException("You cannnot set resource "+name);
  60                 }
  61
  62                 public object QuackInvoke(string name, params object[] args)
  63                 {
  64                         throw new RailsException("You cannnot invoke resource "+name);
  65                 }
  66
  67                 public IEnumerator GetEnumerator()
  68                 {
  69                         return resource.GetEnumerator();
  70                 }
  71         }
  72 }