mcs/class/System.ComponentModel.DataAnnotations/System.ComponentModel.DataAnnotations/ValidationAttributeCollectionExtensions.cs

   1 //
   2 // Authors:
   3 //      Marek Habersack <grendel@twistedcode.net>
   4 //
   5 // Copyright (C) 2011 Novell Inc. http://novell.com
   6 //
   7
   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 using System;
  29 using System.Collections.Generic;
  30 using System.ComponentModel;
  31 using System.Linq;
  32 using System.Reflection;
  33
  34 namespace System.ComponentModel.DataAnnotations
  35 {
  36         static class ValidationAttributeCollectionExtensions
  37         {
  38                 public static void Validate <TAttribute> (this AttributeCollection attributes, object value, ValidationContext validationContext,
  39                                                           ICollection <ValidationResult> validationResults, ref bool valid)
  40                         where TAttribute: ValidationAttribute
  41                 {
  42                         if (attributes == null || attributes == AttributeCollection.Empty || attributes.Count <= 0)
  43                                 return;
  44
  45                         ValidationResult result;
  46                         foreach (TAttribute attr in attributes.OfType <TAttribute> ()) {
  47                                 result = attr.GetValidationResult (value, validationContext);
  48                                 if (result != ValidationResult.Success) {
  49                                         valid = false;
  50                                         if (validationResults != null)
  51                                                 validationResults.Add (result);
  52                                 }
  53                         }
  54                 }
  55
  56                 public static void ValidateExcept <TAttribute> (this AttributeCollection attributes, object value, ValidationContext validationContext,
  57                                                                 ICollection <ValidationResult> validationResults, ref bool valid)
  58                         where TAttribute: ValidationAttribute
  59                 {
  60                         if (attributes == null || attributes == AttributeCollection.Empty || attributes.Count <= 0)
  61                                 return;
  62
  63                         ValidationResult result;
  64                         ValidationAttribute vattr;
  65                         foreach (Attribute attr in attributes) {
  66                                 if (attr is TAttribute)
  67                                         continue;
  68                                 vattr = attr as ValidationAttribute;
  69                                 if (vattr == null)
  70                                         continue;
  71
  72                                 result = vattr.GetValidationResult (value, validationContext);
  73                                 if (result != ValidationResult.Success) {
  74                                         valid = false;
  75                                         if (validationResults != null)
  76                                                 validationResults.Add (result);
  77                                 }
  78                         }
  79                 }
  80         }
  81 }