/// <summary>
/// Validate the given object. Handles integer and Guid type identifiers.
/// </summary>
/// <param name="businessObject">
/// The business object to validate.
/// </param>
/// <returns>
/// Returns true if validation were succesful.
/// </returns>
public override bool Validate(ValidatableObjectBase businessObject)
{
try
{
// Get identity property from business object
var identity = GetPropertyValue(businessObject);
// If identity is integer check that it is 0 or positive value
if (identity.GetType() == typeof(int))
{
int id;
if (int.TryParse(identity.ToString(), out id))
{
return(id >= 0);
}
// Parse failed.
return(false);
}
// If identity is GUID check that parsing is successful
if (identity.GetType() == typeof(Guid))
{
Guid id;
if (Guid.TryParse(identity.ToString(), out id))
{
// If id is empty return false;
return(id != Guid.Empty);
}
// Parse failed
return(false);
}
// No match on types return false
return(false);
}
catch (Exception exception)
{
Debug.WriteLine(exception);
return(false);
}
}
/// <summary>
/// Validates the object.
/// </summary>
/// <param name="businessObject">
/// The business object to validate
/// </param>
/// <returns>
/// Returns true if the validation were successful.
/// </returns>
public override bool Validate(ValidatableObjectBase businessObject)
{
try
{
// Get property from the given business object
var property = this.GetPropertyValue(businessObject).ToString();
// If regular expression is empty, throw ArgumentException
// If expression is null and match is called, it counts as success, but I wanted to cut that out.
if (string.IsNullOrEmpty(this.expression))
{
throw new ArgumentException("Expression value is not set. Currently RegexValidationRule does not support empty validation expression.");
}
// Match propertys value to the given expression
return(Regex.Match(property, this.expression).Success);
}
catch (Exception exception)
{
Debug.WriteLine(exception);
return(false);
}
}
/// <summary>
/// Gets value from the business object using simple reflection.
/// </summary>
/// <param name="businessObject">
/// Business object to inspect
/// </param>
/// <returns>
/// Returns Property's object or null
/// </returns>
protected object GetPropertyValue(ValidatableObjectBase businessObject)
{
return(businessObject.GetType().GetProperty(this.PropertyName).GetValue(businessObject, null));
}
/// <summary> /// Validation method that contains validation implmentation. Needs to be implemented on the derived objects. /// </summary> /// <param name="businessObject"> /// Business object to validate. /// </param> /// <returns> /// Returns true if validation was successful. /// </returns> public abstract bool Validate(ValidatableObjectBase businessObject);
