mcs/class/System.Data/System.Data.Common/DbProviderFactoriesConfigurationHandler.cs

   1 //
   2 // System.Data.Common.DbProviderFactoriesConfigurationHandler.cs
   3 //
   4 // Author:
   5 //   Sureshkumar T (tsureshkumar@novell.com)
   6 //   Tim Coleman (tim@timcoleman.com)
   7 //
   8 // Copyright (C) Tim Coleman, 2003
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 #if NET_2_0
  35
  36 using System.IO;
  37 using System.Xml;
  38 using System.Globalization;
  39 using System.Configuration;
  40
  41 namespace System.Data.Common {
  42         public class DbProviderFactoriesConfigurationHandler : IConfigurationSectionHandler
  43         {
  44                 #region Constructors
  45
  46                 [MonoTODO]
  47                 public DbProviderFactoriesConfigurationHandler ()
  48                 {
  49                 }
  50
  51                 #endregion // Constructors
  52
  53                 #region Methods
  54
  55                 [MonoTODO]
  56                 public virtual object Create (object parent, object configContext, XmlNode section)
  57                 {
  58                         DataSet ds = new DataSet ("DbProviderFactories");
  59                         CreateDataTables (ds, section);
  60                         return ds;
  61                 }
  62
  63                 internal virtual void CreateDataTables (DataSet ds, XmlNode section)
  64                 {
  65                         DataTable dt = ds.Tables.Add ("DbProviderFactories");
  66                         DataColumn [] columns = new DataColumn [5];
  67                         columns [0] = new DataColumn ("Name", typeof (string));
  68                         columns [1] = new DataColumn ("Description", typeof (string));
  69                         columns [2] = new DataColumn ("InvariantName", typeof (string));
  70                         columns [3] = new DataColumn ("AssemblyQualifiedName", typeof (string));
  71                         columns [4] = new DataColumn ("SupportedClasses", typeof (int));
  72                         dt.Columns.AddRange (columns);
  73                         dt.PrimaryKey = new DataColumn [] {columns [2]};
  74
  75                         foreach (XmlNode node in section.SelectNodes (".//DbProviderFactories")) {
  76                                 AddRows (dt, node);
  77                                 RemoveRows (dt, node);
  78                        }
  79                 }
  80
  81                 internal string GetAttributeValue (XmlNode node, string name)
  82                 {
  83                         XmlAttribute attr = node.Attributes[name];
  84                         if (attr == null)
  85                                 throw new ConfigurationException ("Required Attribute '" + name +
  86                                                                   "' is  missing!", node);
  87                         string value = attr.Value;
  88                         if (value == "")
  89                                 throw new ConfigurationException ("Attribute '" + name + "' cannot be empty!",
  90                                                                   node);
  91                         return value;
  92                 }
  93
  94                 internal virtual void AddRows (DataTable dt, XmlNode factoriesNode)
  95                 {
  96                         foreach (XmlNode addNode in factoriesNode.SelectNodes (".//add")) {
  97                                 if (addNode.NodeType != XmlNodeType.Element)
  98                                         continue;
  99
 100                                 string name = "";
 101                                 string description = "";
 102                                 string invariant = "";
 103                                 string type = "";
 104                                 string supportedClasses = "";
 105                                 int support;
 106
 107                                 name            = GetAttributeValue (addNode, "name");
 108                                 description     = GetAttributeValue (addNode, "description");
 109                                 invariant       = GetAttributeValue (addNode, "invariant");
 110                                 type            = GetAttributeValue (addNode, "type");
 111                                 supportedClasses = GetAttributeValue (addNode, "support");
 112
 113                                 support = int.Parse (supportedClasses, NumberStyles.HexNumber);
 114
 115                                 DataRow row = dt.NewRow ();
 116                                 row [0] = name;
 117                                 row [1] = description;
 118                                 row [2] = invariant;
 119                                 row [3] = type;
 120                                 row [4] = support;
 121
 122                                 dt.Rows.Add (row);
 123                         }
 124                 }
 125
 126                 internal virtual void RemoveRows (DataTable dt, XmlNode removeNode)
 127                 {
 128                         foreach (XmlNode node in removeNode.SelectNodes (".//remove")) {
 129                                 if (node.NodeType != XmlNodeType.Element)
 130                                         continue;
 131
 132                                 string invariant = GetAttributeValue (node, "invariant");
 133                                 DataRow row = dt.Rows.Find (invariant);
 134                                 if (row != null)
 135                                         row.Delete ();
 136                         }
 137                 }
 138
 139
 140                 #endregion // Methods
 141         }
 142 }
 143
 144 #endif // NET_2_0