InversionOfControl/Castle.MicroKernel/Registration/ServiceOverrideDescriptor.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.MicroKernel.Registration
  16 {
  17         using System;
  18         using System.Collections;
  19         using System.Collections.Generic;
  20         using Castle.Core;
  21         using Castle.Core.Configuration;
  22         using Castle.MicroKernel.Util;
  23
  24         public class ServiceOverrideDescriptor<S> : AbstractPropertyDescriptor<S>
  25         {
  26                 public ServiceOverrideDescriptor(params ServiceOverride[] overrides)
  27                         : base(overrides)
  28                 {
  29                 }
  30
  31                 public ServiceOverrideDescriptor(IDictionary dictionary)
  32                         : base(dictionary)
  33                 {
  34                 }
  35
  36                 public ServiceOverrideDescriptor(object overridesAsAnonymousType)
  37                         : base(new ReflectionBasedDictionaryAdapter(overridesAsAnonymousType))
  38                 {
  39                 }
  40
  41                 protected override void ApplyProperty(IKernel kernel, ComponentModel model,
  42                                                       String key, Object value, Property property)
  43                 {
  44                         if (value is string)
  45                         {
  46                                 ApplySimpleReference(kernel, model, key, (String)value);
  47                         }
  48                         else if (value is IEnumerable<String>)
  49                         {
  50                                 ServiceOverride serviceOverride = (ServiceOverride)property;
  51                                 ApplyReferenceList(kernel, model, key, (IEnumerable<String>)value, serviceOverride);
  52                         }
  53                 }
  54
  55                 private void ApplySimpleReference(IKernel kernel, ComponentModel model,
  56                                                       String key, String componentKey)
  57                 {
  58                         String reference = FormattedReferenceExpression(componentKey);
  59                         Registration.AddParameter(kernel, model, key, reference);
  60                 }
  61
  62                 private void ApplyReferenceList(IKernel kernel, ComponentModel model,
  63                                                                                 String key, IEnumerable<String> componentKeys,
  64                                                     ServiceOverride serviceOverride)
  65                 {
  66                         MutableConfiguration list = new MutableConfiguration("list");
  67
  68                         if (serviceOverride != null && serviceOverride.Type != null)
  69                         {
  70                                 list.Attributes.Add("type", serviceOverride.Type.AssemblyQualifiedName);
  71                         }
  72
  73                         foreach (String componentKey in componentKeys )
  74                         {
  75                                 String reference = FormattedReferenceExpression(componentKey);
  76                                 MutableConfiguration node = new MutableConfiguration("item", reference);
  77                                 list.Children.Add(node);
  78                         }
  79
  80                         Registration.AddParameter(kernel, model, key, list);
  81                 }
  82
  83                 private static String FormattedReferenceExpression(String value)
  84                 {
  85                         if (!ReferenceExpressionUtil.IsReference(value))
  86                         {
  87                                 value = String.Format("${{{0}}}", value);
  88                         }
  89                         return value;
  90                 }
  91         }
  92 }