mcs/class/System/System.Configuration/AppSettingsSection.cs

   1 //
   2 // System.Configuration.AppSettingsSection.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //
   7 // Permission is hereby granted, free of charge, to any person obtaining
   8 // a copy of this software and associated documentation files (the
   9 // "Software"), to deal in the Software without restriction, including
  10 // without limitation the rights to use, copy, modify, merge, publish,
  11 // distribute, sublicense, and/or sell copies of the Software, and to
  12 // permit persons to whom the Software is furnished to do so, subject to
  13 // the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be
  16 // included in all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 //
  26 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  27 //
  28
  29 #if NET_2_0 && XML_DEP
  30 #if XML_DEP
  31 using System;
  32 using System.Collections.Specialized;
  33 using System.Xml;
  34 using System.IO;
  35
  36 namespace System.Configuration {
  37
  38         public sealed class AppSettingsSection : ConfigurationSection
  39         {
  40                 ConfigNameValueCollection values;
  41                 bool hasClear;
  42
  43                 public AppSettingsSection ()
  44                 {
  45                 }
  46
  47                 protected internal override  bool IsModified ()
  48                 {
  49                         return values != null && values.IsModified;
  50                 }
  51
  52                 [MonoTODO ("Read file attribute")]
  53                 protected internal override void ReadXml (XmlReader reader, object context)
  54                 {
  55                         XmlDocument doc = new XmlDocument ();
  56                         XmlNode data = doc.ReadNode (reader);
  57                         hasClear = ((XmlElement)data)["clear"] != null;
  58                         values = ConfigHelper.GetNameValueCollection (values, data, "key", "value");
  59                 }
  60
  61                 protected internal override void Reset (ConfigurationElement parentSection, object context)
  62                 {
  63                         AppSettingsSection sec = parentSection as AppSettingsSection;
  64                         if (sec != null && sec.values != null)
  65                                 values = new ConfigNameValueCollection (sec.values);
  66                         else
  67                                 values = null;
  68                 }
  69
  70                 protected internal override void ResetModified ()
  71                 {
  72                         if (values != null) values.ResetModified ();
  73                 }
  74
  75                 protected internal override string WriteXml (
  76                         ConfigurationElement parent, object context, string name, ConfigurationUpdateMode mode)
  77                 {
  78                         AppSettingsSection sec = parent as AppSettingsSection;
  79                         NameValueCollection parentValues = sec != null && !hasClear ? sec.Settings : null;
  80
  81                         StringWriter sw = new StringWriter ();
  82                         XmlTextWriter writer = new XmlTextWriter (sw);
  83                         writer.WriteStartElement ("appSettings");
  84
  85                         if (hasClear) {
  86                                 writer.WriteStartElement ("clear");
  87                                 writer.WriteEndElement ();
  88                         }
  89
  90                         foreach (string key in values) {
  91                                 string val = values [key];
  92                                 string parentVal = parentValues != null ? parentValues [key] : null;
  93                                 if (parentVal != val) {
  94                                         writer.WriteStartElement ("add");
  95                                         writer.WriteAttributeString ("key", key);
  96                                         writer.WriteAttributeString ("value", val);
  97                                         writer.WriteEndElement ();
  98                                 }
  99                         }
 100
 101                         if (parentValues != null) {
 102                                 foreach (string key in parentValues) {
 103                                         if (values [key] == null) {
 104                                                 writer.WriteStartElement ("remove");
 105                                                 writer.WriteAttributeString ("key", key);
 106                                                 writer.WriteEndElement ();
 107                                         }
 108                                 }
 109                         }
 110
 111                         writer.WriteEndElement ();
 112                         return sw.ToString ();
 113                 }
 114
 115                 [MonoTODO]
 116                 public string File {
 117                         get { throw new NotImplementedException (); }
 118                         set { throw new NotImplementedException (); }
 119                 }
 120
 121                 public NameValueCollection Settings {
 122                         get {
 123                                 if (values == null)
 124                                         values = new ConfigNameValueCollection();
 125                                 return values;
 126                         }
 127                 }
 128         }
 129 }
 130 #endif
 131 #endif