InversionOfControl/Castle.Windsor/Configuration/Interpreters/XmlProcessor/ElementProcessors/PropertiesElementProcessor.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.Windsor.Configuration.Interpreters.XmlProcessor.ElementProcessors
  16 {
  17         using System;
  18         using System.Xml;
  19
  20         public class PropertiesElementProcessor : AbstractXmlNodeProcessor
  21         {
  22                 public override String Name
  23                 {
  24                         get { return "properties"; }
  25                 }
  26
  27                 /// <summary>
  28                 ///
  29                 /// </summary>
  30                 /// <param name="nodeList"></param>
  31                 /// <param name="engine"></param>
  32                 /// <example>
  33                 /// <code>
  34                 ///     <properties>
  35                 ///                     <attributes>
  36                 ///                             <myAttribute>attributeValue</myAttribute>
  37                 ///                     </attributes>
  38                 ///                     <myProperty>propertyValue</myProperty>
  39                 ///             </properties>
  40                 /// </code>
  41                 /// </example>
  42                 public override void Process(IXmlProcessorNodeList nodeList, IXmlProcessorEngine engine)
  43                 {
  44                         XmlElement element = nodeList.Current as XmlElement;
  45
  46                         IXmlProcessorNodeList childNodes = new DefaultXmlProcessorNodeList(element.ChildNodes);
  47
  48                         while(childNodes.MoveNext())
  49                         {
  50                                 // Properties processing its a little more complicated than usual
  51                                 // since we need to support all special tags (if,else,define...)
  52                                 // plus we need to register any regular element as a property asap
  53                                 // since we should support properties that reference other properties
  54                                 // i.e. <myprop2>#{prop1}</myprop2>
  55                                 if (engine.HasSpecialProcessor(childNodes.Current))
  56                                 {
  57                                         // Current node its a special element so we bookmark it before processing it...
  58                                         XmlNode current = childNodes.Current;
  59
  60                                         int pos = childNodes.CurrentPosition;
  61
  62                                         engine.DispatchProcessCurrent(childNodes);
  63
  64                                         // ...after processing we need to refresh childNodes
  65                                         // to account for any special element that affects the node tree (if,choose...)
  66                                         childNodes = new DefaultXmlProcessorNodeList(element.ChildNodes);
  67
  68                                         // we only care about changes in the tree from the current node and forward
  69                                         // so if the new list is empty or smaller we just exit the loop
  70                                         if (pos < childNodes.Count)
  71                                         {
  72                                                 childNodes.CurrentPosition = pos;
  73
  74                                                 // if the current node gets replaced in the new list we need to restart processing
  75                                                 // otherwise we just continue as usual
  76                                                 if (childNodes.Current != current)
  77                                                 {
  78                                                         childNodes.CurrentPosition -= 1;
  79                                                         continue;
  80                                                 }
  81                                         }
  82                                         else
  83                                         {
  84                                                 break;
  85                                         }
  86                                 }
  87                                 else
  88                                 {
  89                                         engine.DispatchProcessCurrent(childNodes);
  90                                 }
  91
  92                                 if (IgnoreNode(childNodes.Current)) continue;
  93
  94                                 XmlElement elem = GetNodeAsElement(element, childNodes.Current);
  95
  96                                 engine.AddProperty(elem);
  97                         }
  98
  99                         RemoveItSelf(element);
 100                 }
 101         }
 102 }