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137 lines
4.5 KiB
C#
137 lines
4.5 KiB
C#
9 months ago
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#region License, Terms and Conditions
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//
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// Jayrock - JSON and JSON-RPC for Microsoft .NET Framework and Mono
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// Written by Atif Aziz (atif.aziz@skybow.com)
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// Copyright (c) 2005 Atif Aziz. All rights reserved.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License as published by the Free
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// Software Foundation; either version 2.1 of the License, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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// details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this library; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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#endregion
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namespace Jayrock.Configuration
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{
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#region Imports
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using System;
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using System.Collections;
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using System.Configuration;
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using System.Globalization;
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using System.Xml;
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#endregion
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public class DictionarySectionHandler : IConfigurationSectionHandler
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{
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public virtual object Create(object parent, object configContext, XmlNode section)
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{
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if (section == null)
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throw new ArgumentNullException("section");
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IDictionary dictionary = CreateDictionary(parent);
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string keyName = KeyName;
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foreach (XmlNode childNode in section.ChildNodes)
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{
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if (childNode.NodeType == XmlNodeType.Comment ||
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childNode.NodeType == XmlNodeType.Whitespace)
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{
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continue;
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}
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if (childNode.NodeType != XmlNodeType.Element)
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{
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throw new ConfigurationErrorsException(string.Format("Unexpected type of node ({0}) in configuration.",
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childNode.NodeType.ToString()), childNode);
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}
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string nodeName = childNode.Name;
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if (nodeName == "clear")
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{
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OnClear(dictionary);
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}
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else
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{
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XmlAttribute keyAttribute = childNode.Attributes[keyName];
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string key = keyAttribute == null ? null : keyAttribute.Value;
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if (key == null || key.Length == 0)
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throw new ConfigurationErrorsException("Missing entry key.", childNode);
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if (nodeName == "add")
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{
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OnAdd(dictionary, key, childNode);
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}
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else if (nodeName == "remove")
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{
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OnRemove(dictionary, key);
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}
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else
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{
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throw new ConfigurationErrorsException(string.Format("'{0}' is not a valid dictionary node. Use add, remove or clear.", nodeName), childNode);
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}
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}
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}
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return dictionary;
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}
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protected virtual IDictionary CreateDictionary(object parent)
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{
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return parent != null ?
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new Hashtable((IDictionary)parent, StringComparer.InvariantCultureIgnoreCase) :
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new Hashtable(StringComparer.InvariantCultureIgnoreCase);
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}
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protected virtual string KeyName
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{
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get { return "key"; }
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}
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protected virtual string ValueName
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{
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get { return "value"; }
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}
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protected virtual void OnAdd(IDictionary dictionary, string key, XmlNode node)
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{
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if (dictionary == null)
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throw new ArgumentNullException("dictionary");
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if (node == null)
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throw new ArgumentNullException("node");
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XmlAttribute valueAttribute = node.Attributes[ValueName];
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dictionary.Add(key, valueAttribute != null ? valueAttribute.Value : null);
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}
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protected virtual void OnRemove(IDictionary dictionary, string key)
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{
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if (dictionary == null)
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throw new ArgumentNullException("dictionary");
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dictionary.Remove(key);
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}
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protected virtual void OnClear(IDictionary dictionary)
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{
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if (dictionary == null)
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throw new ArgumentNullException("dictionary");
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dictionary.Clear();
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}
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}
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}
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