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//
// NullableStringValidator.cs
//
// Authors:
// Atsushi Enomoto (atsushi@ximian.com)
// Lluis Sanchez Gual (lluis@novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
// copied StringValidator.cs and changed class name and just one line
// in Validate() (see there).
#if NET_2_0
namespace System.Configuration
{
internal class NullableStringValidator: ConfigurationValidatorBase
{
char[] invalidCharacters;
int maxLength;
int minLength;
public NullableStringValidator (int minLength)
{
this.minLength = minLength;
maxLength = int.MaxValue;
}
public NullableStringValidator (int minLength, int maxLength)
{
this.minLength = minLength;
this.maxLength = maxLength;
}
public NullableStringValidator (int minLength, int maxLength, string invalidCharacters)
{
this.minLength = minLength;
this.maxLength = maxLength;
if (invalidCharacters != null)
this.invalidCharacters = invalidCharacters.ToCharArray ();
}
public override bool CanValidate (Type type)
{
return type == typeof(string);
}
public override void Validate (object value)
{
// This is the only difference from StringValidator:
// null value is always allowed.
if (value == null)
return;
string s = (string) value;
if (s == null || s.Length < minLength)
throw new ArgumentException ("The string must be at least " + minLength + " characters long.");
if (s.Length > maxLength)
throw new ArgumentException ("The string must be no more than " + maxLength + " characters long.");
if (invalidCharacters != null) {
int i = s.IndexOfAny (invalidCharacters);
if (i != -1)
throw new ArgumentException (String.Format ("The string cannot contain any of the following characters: '{0}'.", invalidCharacters));
}
}
}
}
#endif
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