protected override void OnValidate(PatternCheckContext context)
{
if (Value == null)
{
throw new Exception("Pattern has no value");
}
Value.Validate(context);
}
public void Validate(PatternCheckContext context)
{
if (_checked)
{
return;
}
// If checking a child causes this element to be
// checked again, don't get caught in a loop.
_checked = true;
OnValidate(context);
}
protected abstract void OnValidate(PatternCheckContext context);