private void update(IRhspData data, XDocument document)
{
RhspDataAttribute hdca = GetRuntimeHda(data.GetType());
XElement element = getElementUsingHda(document, data.DataID, hdca);
// Delegate element update to object it's self.
data.UpdateElement(element, this);
/* Set the latest schema version (as re-saving automatically
* updates the object to this version). Versions are only ever
* opened as earlier versions and never saved as this. */
updateVersionElement(element, hdca);
}
private void create(IRhspData data, XDocument document)
{
if (data.DataID == null)
{
throw new Exception(
"Hosting ID cannot be unassigned.");
}
RhspDataAttribute hda = GetRuntimeHda(data.GetType());
XElement parent = getParent(document, hda.Parent);
var uniqueQuery = find(parent, data.DataID, hda);
// Ensure that IDs are not duplicated.
if (uniqueQuery.Count() != 0)
{
throw new InvalidOperationException(
"An element with name '" + hda.Name + "' in parent " +
"'" + hda.Parent + "' already contains unique ID " +
"with value of '" + data.DataID + "'.");
}
// Get original data without unique ID present.
XElement element = data.ToXElement(this);
// Add ID first for better visual diagnosis.
element.AddFirst(new XElement(hda.ID, data.DataID.Value));
if (hda.SchemaVersion != 0)
{
// Add version before the ID element, but only if neccecary.
element.AddFirst(new XElement(SchemaVersionElement, hda.SchemaVersion));
}
// Add the element with unique ID present.
parent.Add(element);
}