/// <summary>
/// Validates the specified property via the supplied method delegate.
/// </summary>
/// <param name="validationDelegate">The validation delegate.</param>
/// <param name="failureMessage">The failure message.</param>
/// <param name="propertyName">Name of the property.</param>
/// <param name="validationProxy">The validation proxy.</param>
/// <returns>Returns an IMessage if validation was not successful, otherwise null is returned to indicate success.</returns>
public IValidationMessage ValidateProperty(Func <bool> validationDelegate, IValidationMessage failureMessage, string propertyName, IValidatable validationProxy = null)
{
if (validationProxy != null)
{
return(validationProxy.ValidateProperty(validationDelegate, failureMessage, propertyName));
}
bool passedValidation = validationDelegate();
if (!passedValidation)
{
this.AddValidationMessage(failureMessage, propertyName);
}
else
{
this.RemoveValidationMessage(failureMessage, propertyName);
}
return(!passedValidation ? failureMessage : null);
}