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//------------------------------------------------------------------------------
// <copyright file="NameValueSectionHandler.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Configuration {
using System.Collections;
using System.Collections.Specialized;
using System.Xml;
using System.Globalization;
/// <devdoc>
/// Simple dictionary config factory
/// </devdoc>
public class NameValueSectionHandler : IConfigurationSectionHandler {
const string defaultKeyAttribute = "key";
const string defaultValueAttribute = "value";
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public object Create(object parent, object context, XmlNode section) {
return CreateStatic(parent, section, KeyAttributeName, ValueAttributeName);
}
internal static object CreateStatic(object parent, XmlNode section) {
return CreateStatic(parent, section, defaultKeyAttribute, defaultValueAttribute);
}
internal static object CreateStatic(object parent, XmlNode section, string keyAttriuteName, string valueAttributeName) {
ReadOnlyNameValueCollection result;
// start result off as a shallow clone of the parent
if (parent == null)
result = new ReadOnlyNameValueCollection(StringComparer.OrdinalIgnoreCase);
else {
ReadOnlyNameValueCollection parentCollection = (ReadOnlyNameValueCollection)parent;
result = new ReadOnlyNameValueCollection(parentCollection);
}
// process XML
HandlerBase.CheckForUnrecognizedAttributes(section);
foreach (XmlNode child in section.ChildNodes) {
// skip whitespace and comments
if (HandlerBase.IsIgnorableAlsoCheckForNonElement(child))
continue;
// handle <set>, <remove>, <clear> tags
if (child.Name == "add") {
String key = HandlerBase.RemoveRequiredAttribute(child, keyAttriuteName);
String value = HandlerBase.RemoveRequiredAttribute(child, valueAttributeName, true/*allowEmptyString*/);
HandlerBase.CheckForUnrecognizedAttributes(child);
result[key] = value;
}
else if (child.Name == "remove") {
String key = HandlerBase.RemoveRequiredAttribute(child, keyAttriuteName);
HandlerBase.CheckForUnrecognizedAttributes(child);
result.Remove(key);
}
else if (child.Name.Equals("clear")) {
HandlerBase.CheckForUnrecognizedAttributes(child);
result.Clear();
}
else {
HandlerBase.ThrowUnrecognizedElement(child);
}
}
result.SetReadOnly();
return result;
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected virtual string KeyAttributeName {
get { return defaultKeyAttribute;}
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
protected virtual string ValueAttributeName {
get { return defaultValueAttribute;}
}
}
}
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