mcs/class/System.Configuration/System.Configuration/ConfigurationProperty.cs

   1 //
   2 // System.Configuration.ConfigurationProperty.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //  Lluis Sanchez Gual (lluis@novell.com)
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining
   9 // a copy of this software and associated documentation files (the
  10 // "Software"), to deal in the Software without restriction, including
  11 // without limitation the rights to use, copy, modify, merge, publish,
  12 // distribute, sublicense, and/or sell copies of the Software, and to
  13 // permit persons to whom the Software is furnished to do so, subject to
  14 // the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be
  17 // included in all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 //
  27 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  28 //
  29
  30 #if NET_2_0
  31 using System;
  32 using System.ComponentModel;
  33
  34 namespace System.Configuration
  35 {
  36         public sealed class ConfigurationProperty
  37         {
  38                 internal static object NoDefaultValue = new object ();
  39
  40                 string name;
  41                 Type type;
  42                 object default_value = NoDefaultValue;
  43                 TypeConverter converter;
  44                 ConfigurationValidatorBase validation;
  45                 ConfigurationPropertyOptions flags;
  46                 string description;
  47                 ConfigurationCollectionAttribute collectionAttribute;
  48
  49                 public ConfigurationProperty (string name, Type type)
  50                         : this (name, type, NoDefaultValue, TypeDescriptor.GetConverter (type), new DefaultValidator(), ConfigurationPropertyOptions.None, null)
  51                 { }
  52
  53                 public ConfigurationProperty (string name, Type type, object default_value)
  54                         : this (name, type, default_value, TypeDescriptor.GetConverter (type), new DefaultValidator(), ConfigurationPropertyOptions.None, null)
  55                 { }
  56
  57                 public ConfigurationProperty (
  58                                         string name, Type type, object default_value,
  59                                         ConfigurationPropertyOptions flags)
  60                         :this (name, type, default_value, TypeDescriptor.GetConverter (type), new DefaultValidator(), flags, null)
  61                 { }
  62
  63                 public ConfigurationProperty (
  64                                         string name, Type type, object default_value,
  65                                         TypeConverter converter,
  66                                         ConfigurationValidatorBase validation,
  67                                         ConfigurationPropertyOptions flags)
  68                         : this (name, type, default_value, converter, validation, flags, null)
  69                 { }
  70
  71                 public ConfigurationProperty (
  72                                         string name, Type type, object default_value,
  73                                         TypeConverter converter,
  74                                         ConfigurationValidatorBase validation,
  75                                         ConfigurationPropertyOptions flags,
  76                                         string description)
  77                 {
  78                         this.name = name;
  79                         this.converter = converter;
  80                         this.default_value = default_value;
  81                         this.flags = flags;
  82                         this.type = type;
  83                         this.validation = validation;
  84                         this.description = description;
  85                 }
  86
  87                 public TypeConverter Converter {
  88                         get { return converter; }
  89                 }
  90
  91                 public object DefaultValue {
  92                         get { return default_value; }
  93                 }
  94
  95                 public bool IsKey {
  96                         get { return (flags & ConfigurationPropertyOptions.IsKey) != 0; }
  97                 }
  98
  99                 public bool IsRequired {
 100                         get { return (flags & ConfigurationPropertyOptions.IsRequired) != 0; }
 101                 }
 102
 103                 public bool IsDefaultCollection {
 104                         get { return (flags & ConfigurationPropertyOptions.IsDefaultCollection) != 0; }
 105                 }
 106
 107                 public string Name {
 108                         get { return name; }
 109                 }
 110
 111                 public string Description {
 112                         get { return description; }
 113                 }
 114
 115                 public Type Type {
 116                         get { return type; }
 117                 }
 118
 119                 public ConfigurationValidatorBase Validator {
 120                         get { return validation; }
 121                 }
 122
 123                 internal object ConvertFromString (string value)
 124                 {
 125                         if (converter != null)
 126                                 return converter.ConvertFromInvariantString (value);
 127                         else
 128                                 throw new NotImplementedException ();
 129                 }
 130
 131                 internal string ConvertToString (object value)
 132                 {
 133                         if (converter != null)
 134                                 return converter.ConvertToInvariantString (value);
 135                         else
 136                                 throw new NotImplementedException ();
 137                 }
 138
 139                 internal bool IsElement {
 140                         get {
 141                                 return (typeof(ConfigurationElement).IsAssignableFrom (type));
 142                         }
 143                 }
 144
 145                 internal ConfigurationCollectionAttribute CollectionAttribute {
 146                         get { return collectionAttribute; }
 147                         set { collectionAttribute = value; }
 148                 }
 149
 150                 internal void Validate (object value)
 151                 {
 152                         if (validation != null)
 153                                 validation.Validate (value);
 154                 }
 155         }
 156 }
 157 #endif