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 using System;
  31 using System.Collections.Generic;
  32 using System.ComponentModel;
  33 using System.Xml;
  34 using System.Xml.XPath;
  35
  36 namespace Mono.Web.Util
  37 {
  38         public enum SettingsMappingPlatform
  39         {
  40                 Windows,
  41                 Unix
  42         };
  43
  44         internal class SettingsMapping
  45         {
  46                 string _sectionTypeName;
  47                 Type _sectionType;
  48                 string _mapperTypeName;
  49                 Type _mapperType;
  50                 SettingsMappingPlatform _platform;
  51                 List <SettingsMappingWhat> _whats;
  52
  53                 public Type SectionType {
  54                         get {
  55                                 if (_sectionType == null)
  56                                         _sectionType = Type.GetType (_sectionTypeName, false);
  57                                 return _sectionType;
  58                         }
  59                 }
  60
  61                 public Type MapperType {
  62                         get {
  63                                 if (_mapperType == null) {
  64                                         _mapperType = Type.GetType (_mapperTypeName, true);
  65                                         if (!typeof (ISectionSettingsMapper).IsAssignableFrom (_mapperType)) {
  66                                                 _mapperType = null;
  67                                                 throw new InvalidOperationException ("Mapper type does not implement the ISectionSettingsMapper interface");
  68                                         }
  69                                 }
  70
  71                                 return _mapperType;
  72                         }
  73                 }
  74
  75                 public SettingsMappingPlatform Platform {
  76                         get { return _platform; }
  77                 }
  78
  79                 public SettingsMapping (XPathNavigator nav)
  80                 {
  81                         _sectionTypeName = nav.GetAttribute ("sectionType", String.Empty);
  82                         _mapperTypeName = nav.GetAttribute ("mapperType", String.Empty);
  83
  84                         EnumConverter cvt = new EnumConverter (typeof (SettingsMappingPlatform));
  85                         _platform = (SettingsMappingPlatform) cvt.ConvertFromInvariantString (nav.GetAttribute ("platform", String.Empty));
  86
  87                         LoadContents (nav);
  88                 }
  89
  90                 public object MapSection (object input, Type type)
  91                 {
  92                         if (type != SectionType)
  93                                 throw new ArgumentException ("type", "Invalid section type for this mapper");
  94
  95                         ISectionSettingsMapper mapper = Activator.CreateInstance (MapperType) as ISectionSettingsMapper;
  96                         if (mapper == null)
  97                                 return input;
  98
  99                         return mapper.MapSection (input, _whats);
 100                 }
 101
 102                 void LoadContents (XPathNavigator nav)
 103                 {
 104                         XPathNodeIterator iter = nav.Select ("./what[string-length (@value) > 0]");
 105                         _whats = new List <SettingsMappingWhat> ();
 106                         while (iter.MoveNext ())
 107                                 _whats.Add (new SettingsMappingWhat (iter.Current));
 108                 }
 109         }
 110 }