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//
// System.Data.OleDb.OleDbConnection
//
// Authors:
// Konstantin Triger <kostat@mainsoft.com>
// Boris Kirzner <borisk@mainsoft.com>
//
// (C) 2006 Mainsoft Corporation (http://www.mainsoft.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Configuration;
using System.Xml;
using System.Collections;
using System.Collections.Specialized;
namespace Mainsoft.Data.Configuration
{
class ProvidersSectionHandler : IConfigurationSectionHandler
{
public virtual object Create (object parent, object configContext, XmlNode section) {
if (section.Attributes != null && section.Attributes.Count != 0)
ThrowException ("Unrecognized attribute", section);
ArrayList providers = new ArrayList();
XmlNodeList providerElements = section.SelectNodes ("provider");
foreach (XmlNode child in providerElements) {
XmlNodeType ntype = child.NodeType;
if (ntype == XmlNodeType.Whitespace || ntype == XmlNodeType.Comment)
continue;
if (ntype != XmlNodeType.Element)
ThrowException ("Only elements allowed", child);
object parentProvider = null;
XmlAttribute extends = child.Attributes["parent"];
if (extends != null) {
string super = extends.Value;
string sectionName = super.Substring(0, super.IndexOf('#'));
string id = super.Substring(sectionName.Length+1);
IList supers = (IList) ConfigurationSettings.GetConfig(sectionName);
for (int i = 0; i < supers.Count; i++) {
Hashtable ht = (Hashtable)supers[i];
string curId = (string)ht["id"];
if (String.CompareOrdinal(id,curId) == 0) {
parentProvider = ht;
break;
}
}
child.Attributes.Remove(extends);
}
DictionarySectionHandler handler = new DictionarySectionHandler();
Hashtable col = (Hashtable) handler.Create (parentProvider, null, child);
providers.Add(col);
}
if (parent != null && parent is IList) {
IList parentList = (IList)parent;
for (int i = 0; i < parentList.Count; i++) {
Hashtable htParent = (Hashtable)parentList[i];
string parentId = (string)htParent["id"];
bool overriden = false;
for (int y = 0; y < providers.Count; y++) {
Hashtable htMe = (Hashtable)providers[y];
string myId = (string)htMe["id"];
if (String.CompareOrdinal(parentId,myId) == 0) {
overriden = true;
foreach (object key in htParent.Keys)
if (!htMe.ContainsKey(key))
htMe[key] = htParent[key];
break;
}
}
if (!overriden)
providers.Add(htParent);
}
}
return providers;
}
static internal void ThrowException (string msg, XmlNode node)
{
if (node != null && node.Name != String.Empty)
msg = msg + " (node name: " + node.Name + ") ";
throw new ConfigurationException (msg, node);
}
}
}
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