/// <summary>
/// Expands the check.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="metadata">The metadata.</param>
/// <returns>
/// A sequence of check elements.
/// </returns>
private static IEnumerable <XElement> ExpandCheck(XElement element, IDbMetadata metadata)
{
var entityName = element.FindAncestorElementAttribute("Entity", "Name");
if (element.Attribute("Match") == null || entityName == null)
{
yield return(element);
}
else
{
Regex match = new Regex(element.Attribute("Match").Value, RegexOptions.IgnoreCase);
var matchedTables = metadata
.AllColumns(entityName)
.Where(t => match.IsMatch(t));
foreach (var column in matchedTables)
{
var expandedElement = new XElement(element);
expandedElement.SetAttributeValue("Field", column);
element.Parent.Add(expandedElement);
RaiseExpansionEvent(expandedElement, match.ToString(), column);
yield return(expandedElement);
}
}
}
