/// <summary>
/// Validates the objects fields content
/// </summary>
/// <param name="validationType">Validation level to use on this model</param>
/// <exception cref="OrderFieldBadFormatException">
/// throws an exception if one of the parameters doesn't match the expected
/// format
/// </exception>
public virtual void Validate(Validations validationType = Validations.Weak)
{
InputValidators.ValidateValuedString(Title, "Title");
InputValidators.ValidateZeroOrPositiveValue(Price.GetValueOrDefault(), "Price");
InputValidators.ValidatePositiveValue(QuantityPurchased.GetValueOrDefault(), "Quantity Purchased");
// optional fields validations
if (ProductId != null)
{
InputValidators.ValidateValuedString(ProductId, "Product Id");
}
Seller?.Validate(validationType);
}