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

   1 // Copyright 2004-2007 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                 /// If the <c>fieldValue</c> is not null, an attempt to convert the
  29                 /// content to a Integer is performed, and the field is considered value
  30                 /// if the conversion is successful.
  31                 /// </summary>
  32                 /// <param name="instance">The target type instance</param>
  33                 /// <param name="fieldValue">The property/field value. It can be null.</param>
  34                 /// <returns>
  35                 ///     <c>true</c> if the value is accepted (has passed the validation test)
  36                 /// </returns>
  37                 public override bool IsValid(object instance, object fieldValue)
  38                 {
  39                         if (fieldValue == null) return false;
  40
  41                         try
  42                         {
  43                                 if (Property.PropertyType == typeof(Int16))
  44                                 {
  45                                         Convert.ToInt16(fieldValue.ToString());
  46                                 }
  47                                 else if (Property.PropertyType == typeof(Int64))
  48                                 {
  49                                         Convert.ToInt64(fieldValue.ToString());
  50                                 }
  51                                 else
  52                                 {
  53                                         Convert.ToInt32(fieldValue.ToString());
  54                                 }
  55
  56                                 return true;
  57                         }
  58                         catch(Exception)
  59                         {
  60                                 return false;
  61                         }
  62                 }
  63
  64                 /// <summary>
  65                 /// Gets a value indicating whether this validator supports web validation.
  66                 /// </summary>
  67                 /// <value>
  68                 ///     <see langword="true"/> if web validation is supported; otherwise, <see langword="false"/>.
  69                 /// </value>
  70                 public override bool SupportsWebValidation
  71                 {
  72                         get { return true; }
  73                 }
  74
  75                 /// <summary>
  76                 /// Applies the web validation by setting up one or
  77                 /// more input rules on <see cref="IWebValidationGenerator"/>.
  78                 /// </summary>
  79                 /// <param name="config">The config.</param>
  80                 /// <param name="inputType">Type of the input.</param>
  81                 /// <param name="generator">The generator.</param>
  82                 /// <param name="attributes">The attributes.</param>
  83                 /// <param name="target">The target.</param>
  84                 public override void ApplyWebValidation(WebValidationConfiguration config, InputElementType inputType,
  85                                                         IWebValidationGenerator generator, IDictionary attributes, string target)
  86                 {
  87                         base.ApplyWebValidation(config, inputType, generator, attributes, target);
  88
  89                         if (inputType == InputElementType.Text)
  90                         {
  91                                 generator.SetDigitsOnly(BuildErrorMessage());
  92                         }
  93                 }
  94
  95                 /// <summary>
  96                 /// Returns the key used to internationalize error messages
  97                 /// </summary>
  98                 /// <value></value>
  99                 protected override string MessageKey
 100                 {
 101                         get { return MessageConstants.InvalidIntegerMessage; }
 102                 }
 103         }
 104 }