/// <summary>
/// Calculate the value from the ordered list of versions.
/// </summary>
/// <remarks>
/// Iterate thru the versions from most specific to most general.
/// For each version first resolve the GUID placeholders then insert
/// the previously calculated version in the more general version.
/// Stop this loop when either the top level is reached or if the
/// resulting version is not marked as 'Combine' (which means it must be 'Override').
/// </remarks>
public ConfigItemVersion CalcValue()
{
Guid mostSpecificUID = Versions[0].UID;
if (_CalculatedValue == null)
{
if (_ApplicationParameter == CfgSystem.First) return Versions[0];
ConfigItemVersion specializedVersion = _ApplicationParameter;
if (specializedVersion != null) specializedVersion.ResolveGuids();
for (int i = 0; i < Versions.Length; i++)
{
ConfigItemVersion version = Versions[i];
version.ResolveGuids();
ConfigItemVersion result = version.Insert(specializedVersion);
if (!result.Combine)
{
_CalculatedValue = result;
break;
}
version = result;
specializedVersion = version;
}
}
_CalculatedValue.UID = mostSpecificUID;
return _CalculatedValue;
}
/// <summary> /// Defines how the given more specific version can be inserted into placeholders of this version. /// </summary> /// <param name="general"></param> /// <returns></returns> public abstract ConfigItemVersion Insert(ConfigItemVersion specific);