#region License
/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#endregion
#region Imports
using System;
using System.Text.RegularExpressions;
using Spring.Expressions;
using Spring.Util;
#endregion
namespace Spring.Validation.Validators{
/// <summary>
/// Perform email validations.
/// </summary>
/// <remarks>
/// <p/>
/// This implementation is not guaranteed to catch all possible errors in an
/// email address. For example, an address like nobody@noplace.nowhere will
/// pass validator, even though there is no TLD "nowhere".
/// </remarks>
/// <author>Goran Milosavljevic</author>
public class EmailValidator : BaseSimpleValidator
{
#region Constructors
/// <summary>
/// Creates a new instance of the <b>EmailValidator</b> class.
/// </summary>
public EmailValidator()
{}
/// <summary>
/// Creates a new instance of the <b>EmailValidator</b> class.
/// </summary>
/// <param name="test">The expression to validate.</param>
/// <param name="when">The expression that determines if this validator should be evaluated.</param>
public EmailValidator(string test, string when)
: base(test, when)
{
AssertUtils.ArgumentHasText(test, "test");
}
/// <summary>
/// Creates a new instance of the <b>EmailValidator</b> class.
/// </summary>
/// <param name="test">The expression to validate.</param>
/// <param name="when">The expression that determines if this validator should be evaluated.</param>
public EmailValidator(IExpression test, IExpression when)
: base(test, when)
{
AssertUtils.ArgumentNotNull(test, "test");
}
#endregion
#region BaseValidator methods
/// <summary>
/// Validates the supplied <paramref name="objectToValidate"/>.
/// </summary>
/// <remarks>
/// In the case of the <see cref="EmailValidator"/> class,
/// the test should be a string variable that will be evaluated and the object
/// obtained as a result of this evaluation will be checked if it is
/// a valid e-mail address.
/// </remarks>
/// <param name="objectToValidate">The object to validate.</param>
/// <returns>
/// <see lang="true"/> if the supplied <paramref name="objectToValidate"/> is valid
/// e-mail address.
/// </returns>
protected override bool Validate(object objectToValidate)
{
string text = objectToValidate as string;
if (StringUtils.IsNullOrEmpty(text))
{
return true;
}
Match match = Regex.Match(text, emailCheck);
return match.Success && match.Index == 0 && match.Length == text.Length;
}
#endregion
#region Data members
/// <summary>
/// Regular expression used for validation of object passed to this <see cref="EmailValidator"/>.
/// </summary>
private static string emailCheck = @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
#endregion
}
}
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