MonoRail/Castle.MonoRail.Views.Brail/IgnoreNull.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 namespace Castle.MonoRail.Views.Brail
  16 {
  17         using System.Reflection;
  18         using Boo.Lang;
  19         using Castle.MonoRail.Framework;
  20
  21         public class IgnoreNull : IQuackFu
  22         {
  23                 private object target;
  24
  25                 public IgnoreNull(object target)
  26                 {
  27                         this.target = target;
  28                 }
  29
  30                 public object QuackGet(string name, object[] parameters)
  31                 {
  32                         if (target == null)
  33                                 return this;
  34                         PropertyInfo property = target.GetType().GetProperty(name);
  35                         if (property == null)
  36                                 throw new RailsException("Could not find property " + name + " on " + target.GetType().FullName);
  37             return new IgnoreNull(property.GetValue(target, parameters));
  38                 }
  39
  40                 public object QuackSet(string name, object[] parameters, object obj)
  41                 {
  42                         if (target == null)
  43                                 return this;
  44                         PropertyInfo property = target.GetType().GetProperty(name);
  45                         if (property == null)
  46                                 throw new RailsException("Could not find property " + name + " on " + target.GetType().FullName);
  47                         property.SetValue(target, obj, parameters);
  48                         return this;
  49                 }
  50
  51                 public object QuackInvoke(string name, object[] args)
  52                 {
  53                         if (target == null)
  54                                 return this;
  55                         MethodInfo method = target.GetType().GetMethod(name);
  56                         if (method == null)
  57                                 throw new RailsException("Could not find method " + name + " on " + target.GetType().FullName);
  58                         return new IgnoreNull(method.Invoke(target, args));
  59                 }
  60
  61                 public override string ToString()
  62                 {
  63                         if(target == null)
  64                                 return string.Empty;
  65                         return target.ToString();
  66                 }
  67         }
  68 }