Components/DictionaryAdapter/Castle.Components.DictionaryAdapter/Attributes/DictionaryStringValuesAttribute.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.Components.DictionaryAdapter
  16 {
  17         using System;
  18         using System.Collections;
  19         using System.ComponentModel;
  20
  21         /// <summary>
  22         /// Converts all properties to strings.
  23         /// </summary>
  24         [AttributeUsage(AttributeTargets.Interface | AttributeTargets.Property,
  25                 AllowMultiple = false, Inherited = true)]
  26         public class DictionaryStringValuesAttribute : DictionaryBehaviorAttribute, IDictionaryPropertySetter
  27         {
  28                 private string format;
  29
  30                 /// <summary>
  31                 /// Gets or sets the format.
  32                 /// </summary>
  33                 /// <value>The format.</value>
  34                 public string Format
  35                 {
  36                         get { return format; }
  37                         set { format = value; }
  38                 }
  39
  40                 #region IDictionaryPropertySetter Members
  41
  42                 bool IDictionaryPropertySetter.SetPropertyValue(
  43                         IDictionaryAdapterFactory factory, IDictionary dictionary,
  44                         string key, ref object value, PropertyDescriptor property)
  45                 {
  46                         if (value != null)
  47                         {
  48                                 value = GetPropertyAsString(property, value);
  49                         }
  50                         return true;
  51                 }
  52
  53                 #endregion
  54
  55                 private string GetPropertyAsString(PropertyDescriptor property, object value)
  56                 {
  57                         if (!string.IsNullOrEmpty(format))
  58                         {
  59                                 return String.Format(format, value);
  60                         }
  61
  62                         TypeConverter converter = property.TypeConverter;
  63
  64
  65                         if (converter != null && converter.CanConvertTo(typeof(string)))
  66                         {
  67                                 return (string) converter.ConvertTo(value, typeof(string));
  68                         }
  69
  70                         return value.ToString();
  71                 }
  72         }
  73 }