class/System/System.Diagnostics/TraceSwitch.cs

   1 //
   2 // System.Diagnostics.TraceSwtich.cs
   3 //
   4 // Comments from John R. Hicks <angryjohn69@nc.rr.com> original implementation
   5 // can be found at: /mcs/docs/apidocs/xml/en/System.Diagnostics
   6 //
   7 // Author:
   8 //      John R. Hicks (angryjohn69@nc.rr.com)
   9 //      Jonathan Pryor (jonpryor@vt.edu)
  10 //
  11 // (C) 2001-2002
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 namespace System.Diagnostics
  36 {
  37 #if NET_2_0
  38         [SwitchLevel (typeof (TraceLevel))]
  39 #endif
  40         public class TraceSwitch : Switch
  41         {
  42                 public TraceSwitch(string displayName, string description)
  43                         : base(displayName, description)
  44                 {
  45                 }
  46
  47 #if NET_2_0
  48                 public TraceSwitch(string displayName, string description, string defaultSwitchValue)
  49                         : base(displayName, description)
  50                 {
  51                         Value = defaultSwitchValue;
  52                 }
  53 #endif
  54
  55                 public TraceLevel Level {
  56                         get {return (TraceLevel) SwitchSetting;}
  57                         set {
  58                                 if (!Enum.IsDefined (typeof(TraceLevel), value))
  59                                         throw new ArgumentException ("value");
  60                                 SwitchSetting = (int) value;
  61                         }
  62                 }
  63
  64                 public bool TraceError {
  65                         get {return SwitchSetting >= (int) TraceLevel.Error;}
  66                 }
  67
  68                 public bool TraceWarning {
  69                         get {return SwitchSetting >= (int) TraceLevel.Warning;}
  70                 }
  71
  72                 public bool TraceInfo {
  73                         get {return SwitchSetting >= (int) TraceLevel.Info;}
  74                 }
  75
  76                 public bool TraceVerbose {
  77                         get {return SwitchSetting >= (int) TraceLevel.Verbose;}
  78                 }
  79
  80                 // .NET accepts values over 4; they're equivalent to TraceLevel.Verbose
  81                 // For -1, .NET crashes.  (Oops!)  Other negative numbers work with an
  82                 // equivalent to setting SwitchSetting to TraceLevel.Off.
  83                 // The logic for the accessors will cope with values >= 4, so we'll just
  84                 // check for negative numbers.
  85                 protected override void OnSwitchSettingChanged()
  86                 {
  87                         if (SwitchSetting < 0)
  88                                 SwitchSetting = (int) TraceLevel.Off;
  89                         else if (SwitchSetting > 4)
  90                                 SwitchSetting = (int) TraceLevel.Verbose;
  91                 }
  92
  93 #if NET_2_0
  94                 protected override void OnValueChanged ()
  95                 {
  96                         SwitchSetting = (int) Enum.Parse (typeof (TraceLevel),
  97                                 Value, true);
  98                 }
  99 #endif
 100         }
 101 }
 102