mcs/class/System.Web/Mono.Web.Util/SettingsMapping.cs

   1 //
   2 // Mono.Web.Util.SettingsMapping
   3 //
   4 // Authors:
   5 //   Marek Habersack (mhabersack@novell.com)
   6 //
   7 // (C) 2007 Novell, Inc
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 #if NET_2_0
  31 using System;
  32 using System.Collections.Generic;
  33 using System.ComponentModel;
  34 using System.Xml;
  35 using System.Xml.XPath;
  36
  37 namespace Mono.Web.Util
  38 {
  39         public enum SettingsMappingPlatform
  40         {
  41                 Windows,
  42                 Unix
  43         };
  44
  45         internal class SettingsMapping
  46         {
  47                 string _sectionTypeName;
  48                 Type _sectionType;
  49                 string _mapperTypeName;
  50                 Type _mapperType;
  51                 SettingsMappingPlatform _platform;
  52                 List <SettingsMappingWhat> _whats;
  53
  54                 public Type SectionType {
  55                         get {
  56                                 if (_sectionType == null)
  57                                         _sectionType = Type.GetType (_sectionTypeName, false);
  58                                 return _sectionType;
  59                         }
  60                 }
  61
  62                 public Type MapperType {
  63                         get {
  64                                 if (_mapperType == null) {
  65                                         _mapperType = Type.GetType (_mapperTypeName, true);
  66                                         if (!typeof (ISectionSettingsMapper).IsAssignableFrom (_mapperType)) {
  67                                                 _mapperType = null;
  68                                                 throw new InvalidOperationException ("Mapper type does not implement the ISectionSettingsMapper interface");
  69                                         }
  70                                 }
  71
  72                                 return _mapperType;
  73                         }
  74                 }
  75
  76                 public SettingsMappingPlatform Platform {
  77                         get { return _platform; }
  78                 }
  79
  80                 public SettingsMapping (XPathNavigator nav)
  81                 {
  82                         _sectionTypeName = nav.GetAttribute ("sectionType", String.Empty);
  83                         _mapperTypeName = nav.GetAttribute ("mapperType", String.Empty);
  84
  85                         EnumConverter cvt = new EnumConverter (typeof (SettingsMappingPlatform));
  86                         _platform = (SettingsMappingPlatform) cvt.ConvertFromInvariantString (nav.GetAttribute ("platform", String.Empty));
  87
  88                         LoadContents (nav);
  89                 }
  90
  91                 public object MapSection (object input, Type type)
  92                 {
  93                         if (type != SectionType)
  94                                 throw new ArgumentException ("type", "Invalid section type for this mapper");
  95
  96                         ISectionSettingsMapper mapper = Activator.CreateInstance (MapperType) as ISectionSettingsMapper;
  97                         if (mapper == null)
  98                                 return input;
  99
 100                         return mapper.MapSection (input, _whats);
 101                 }
 102
 103                 void LoadContents (XPathNavigator nav)
 104                 {
 105                         XPathNodeIterator iter = nav.Select ("./what[string-length (@value) > 0]");
 106                         _whats = new List <SettingsMappingWhat> ();
 107                         while (iter.MoveNext ())
 108                                 _whats.Add (new SettingsMappingWhat (iter.Current));
 109                 }
 110         }
 111 }
 112 #endif