Components/Validator/Castle.Components.Validator/Validators/IntegerValidator.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.Components.Validator
  16 {
  17         using System;
  18         using System.Collections;
  19
  20         /// <summary>
  21         /// This is a meta validator.
  22         /// It is only useful to test a source content before setting it on the
  23         /// target instance.
  24         /// </summary>
  25         public class IntegerValidator : AbstractValidator
  26         {
  27                 /// <summary>
  28                 /// Checks if the <c>fieldValue</c> can be converted to a valid Integer.
  29                 /// Null or empty value are allowed.
  30                 /// </summary>
  31                 /// <param name="instance">The target type instance</param>
  32                 /// <param name="fieldValue">The property/field value. It can be null.</param>
  33                 /// <returns>
  34                 ///     <c>true</c> if the value is accepted (has passed the validation test)
  35                 /// </returns>
  36                 public override bool IsValid(object instance, object fieldValue)
  37                 {
  38                         if (fieldValue == null || fieldValue.ToString() == "") return true;
  39
  40                         string stringValue = fieldValue.ToString();
  41
  42                         if (Property.PropertyType == typeof(Nullable<short>))
  43                         {
  44                                 Int16 intValue;
  45                                 return Int16.TryParse(stringValue, out intValue);
  46                         }
  47                         else if (Property.PropertyType == typeof(Nullable<Int64>))
  48                         {
  49                                 Int64 intValue;
  50                                 return Int64.TryParse(stringValue, out intValue);
  51                         }
  52                         else
  53                         {
  54                                 Int32 intValue;
  55                                 return Int32.TryParse(stringValue, out intValue);
  56                         }
  57                 }
  58
  59                 /// <summary>
  60                 /// Gets a value indicating whether this validator supports browser validation.
  61                 /// </summary>
  62                 /// <value>
  63                 ///     <see langword="true"/> if browser validation is supported; otherwise, <see langword="false"/>.
  64                 /// </value>
  65                 public override bool SupportsBrowserValidation
  66                 {
  67                         get { return true; }
  68                 }
  69
  70                 /// <summary>
  71                 /// Applies the browser validation by setting up one or
  72                 /// more input rules on <see cref="IBrowserValidationGenerator"/>.
  73                 /// </summary>
  74                 /// <param name="config">The config.</param>
  75                 /// <param name="inputType">Type of the input.</param>
  76                 /// <param name="generator">The generator.</param>
  77                 /// <param name="attributes">The attributes.</param>
  78                 /// <param name="target">The target.</param>
  79                 public override void ApplyBrowserValidation(BrowserValidationConfiguration config, InputElementType inputType,
  80                                                             IBrowserValidationGenerator generator, IDictionary attributes,
  81                                                             string target)
  82                 {
  83                         base.ApplyBrowserValidation(config, inputType, generator, attributes, target);
  84                         generator.SetDigitsOnly(target, BuildErrorMessage());
  85                 }
  86
  87                 /// <summary>
  88                 /// Returns the key used to internationalize error messages
  89                 /// </summary>
  90                 /// <value></value>
  91                 protected override string MessageKey
  92                 {
  93                         get { return MessageConstants.InvalidIntegerMessage; }
  94                 }
  95         }
  96 }