class/System.Data.Services/ETagAttribute.cs

   1 //
   2 // ETagAttribute.cs
   3 //
   4 // Author:
   5 //   Eric Maupin  <me@ermau.com>
   6 //
   7 // Copyright (c) 2009 Eric Maupin (http://www.ermau.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.Collections.ObjectModel;
  30
  31 namespace System.Data.Services {
  32         [AttributeUsage (AttributeTargets.Class, AllowMultiple = false, Inherited = true )]
  33         public class ETagAttribute : Attribute {
  34                 public ETagAttribute (string propertyName)
  35                 {
  36                         if (propertyName == null)
  37                                 throw new ArgumentNullException ("propertyName");
  38
  39                         this.properties = new ReadOnlyCollection<string> (new[] { propertyName });
  40                 }
  41
  42                 public ETagAttribute (params string[] propertyNames)
  43                 {
  44                         if (propertyNames == null)
  45                                 throw new ArgumentNullException ("propertyNames");
  46
  47                         this.properties = new ReadOnlyCollection<string> (propertyNames);
  48                 }
  49
  50                 public ReadOnlyCollection<string> PropertyNames {
  51                         get { return this.properties; }
  52                 }
  53
  54                 private readonly ReadOnlyCollection<string> properties;
  55         }
  56 }