mcs/class/Mono.Data/ProviderSectionHandler.cs

   1 //
   2 // Mono.Data.ProviderSectionHandler
   3 //
   4 // Authors:
   5 //   Brian Ritchie (brianlritchie@hotmail.com)
   6 //
   7 //
   8 // Copyright (C) Brian Ritchie, 2002
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Xml;
  34 using System.Configuration;
  35
  36 namespace Mono.Data
  37 {
  38         public class ProviderSectionHandler : IConfigurationSectionHandler
  39         {
  40                 public virtual object Create (object parent, object configContext, XmlNode section)
  41                 {
  42                         if (section == null)
  43                                 throw new System.ArgumentNullException ("section");
  44
  45                         ProviderCollection providers = new ProviderCollection ();
  46
  47                         XmlNodeList ProviderList = section.SelectNodes ("./provider");
  48
  49                         foreach (XmlNode ProviderNode in ProviderList) {
  50                                 Provider provider = new Provider(
  51                                         GetStringValue (ProviderNode, "name", true),
  52                                         GetStringValue (ProviderNode, "connection", true),
  53                                         GetStringValue (ProviderNode, "adapter", true),
  54                                         GetStringValue (ProviderNode, "command", true),
  55                                         GetStringValue (ProviderNode, "assembly", true),
  56                                         GetStringValue (ProviderNode, "description", false),
  57                                         GetStringValue (ProviderNode, "parameterprefix", false),
  58                                         GetStringValue (ProviderNode, "commandbuilder", false));
  59                                 providers.Add (provider);
  60                         }
  61                         return providers;
  62                 }
  63
  64                 private string GetStringValue(XmlNode _node, string _attribute, bool required)
  65                 {
  66                         XmlNode a = _node.Attributes.RemoveNamedItem(_attribute);
  67                         if (a == null) {
  68                                 if (required)
  69                                         throw new ConfigurationException("Attribute required: " + _attribute);
  70                                 else
  71                                         return null;
  72                         }
  73                         return a.Value;
  74                 }
  75         }
  76 }
  77