class/System/System.ComponentModel/LicFileLicenseProvider.cs

   1 //
   2 // System.ComponentModel.LicFileLicenseProvider.cs
   3 //
   4 // Authors:
   5 //   Martin Willemoes Hansen (mwh@sysrq.dk)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //   Lluis Sanchez Gual (lluis@ximian.com)
   8 //
   9 // (C) 2003 Martin Willemoes Hansen
  10 // (C) 2003 Andreas Nahr
  11 //
  12
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System.IO;
  35
  36 namespace System.ComponentModel
  37 {
  38         public class LicFileLicenseProvider : LicenseProvider
  39         {
  40
  41                 public LicFileLicenseProvider()
  42                 {
  43                 }
  44
  45                 public override License GetLicense (LicenseContext context,
  46                                                     Type type,
  47                                                     object instance,
  48                                                     bool allowExceptions)
  49                 {
  50                         try
  51                         {
  52                                 if (context == null || context.UsageMode != LicenseUsageMode.Designtime)
  53                                         return null;
  54
  55                                 string path = Path.GetDirectoryName (type.Assembly.Location);
  56                                 path = Path.Combine (path, type.FullName + ".LIC");
  57
  58                                 if (!File.Exists (path)) return null;
  59
  60                                 StreamReader sr = new StreamReader (path);
  61                                 string key = sr.ReadLine ();
  62                                 sr.Close ();
  63
  64                                 if (IsKeyValid (key, type))
  65                                         return new LicFileLicense (key);
  66                         }
  67                         catch
  68                         {
  69                                 if (allowExceptions) throw;
  70                         }
  71                         return null;
  72                 }
  73
  74                 protected virtual string GetKey (Type type)
  75                 {
  76                         return (type.FullName + " is a licensed component.");
  77                 }
  78
  79                 protected virtual bool IsKeyValid (string key, Type type)
  80                 {
  81                         if (key == null)
  82                                 return false;
  83                         return key.Equals (GetKey (type));
  84                 }
  85         }
  86
  87         internal class LicFileLicense: License
  88         {
  89                 string _key;
  90
  91                 public LicFileLicense (string key)
  92                 {
  93                         _key = key;
  94                 }
  95
  96                 public override string LicenseKey
  97                 {
  98                         get { return _key; }
  99                 }
 100
 101                 public override void Dispose ()
 102                 {
 103                 }
 104         }
 105 }