Components/General/Validator/Castle.Components.Validator/Validators/NullableDateValidator.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 NullableDateValidator : AbstractValidator
  26         {
  27                 /// <summary>
  28                 /// Checks if the <c>fieldValue</c> can be converted to a valid Date (so no time part).
  29                 /// Null or empty value 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) return true;
  39
  40                         string stringValue = fieldValue.ToString();
  41
  42                         if (stringValue == String.Empty) return true;
  43
  44                         DateTime datetimeValue;
  45                         bool valid = DateTime.TryParse(stringValue, out datetimeValue);
  46
  47                         if (valid)
  48                                 return IsDateOnly(datetimeValue);
  49
  50                         return valid;
  51                 }
  52
  53                 /// <summary>
  54                 /// Gets a value indicating whether this validator supports browser validation.
  55                 /// </summary>
  56                 /// <value>
  57                 ///     <see langword="true"/> if browser validation is supported; otherwise, <see langword="false"/>.
  58                 /// </value>
  59                 public override bool SupportsBrowserValidation
  60                 {
  61                         get { return true; }
  62                 }
  63
  64                 /// <summary>
  65                 /// Applies the browser validation by setting up one or
  66                 /// more input rules on <see cref="IBrowserValidationGenerator"/>.
  67                 /// </summary>
  68                 /// <param name="config">The config.</param>
  69                 /// <param name="inputType">Type of the input.</param>
  70                 /// <param name="generator">The generator.</param>
  71                 /// <param name="attributes">The attributes.</param>
  72                 /// <param name="target">The target.</param>
  73                 public override void ApplyBrowserValidation(BrowserValidationConfiguration config, InputElementType inputType,
  74                                                             IBrowserValidationGenerator generator, IDictionary attributes,
  75                                                             string target)
  76                 {
  77                         generator.SetDate(target, BuildErrorMessage());
  78                 }
  79
  80                 /// <summary>
  81                 /// Returns the key used to internationalize error messages
  82                 /// </summary>
  83                 /// <value></value>
  84                 protected override string MessageKey
  85                 {
  86                         get { return MessageConstants.InvalidDateMessage; }
  87                 }
  88
  89                 /// <summary>
  90                 /// Check if only date given (so no time part)
  91                 /// </summary>
  92                 /// <param name="date">The date to check</param>
  93                 /// <returns><see langword="true"/>If Date only; otherwise, <see langword="false"/>.</returns>
  94                 private static bool IsDateOnly(DateTime date)
  95                 {
  96                         return (date.TimeOfDay.TotalMilliseconds == 0);
  97                 }
  98         }
  99 }