private object createFromElement(XElement element, Type dataType)
{
try
{
RhspDataAttribute hda = GetRuntimeHda(dataType);
object data = Activator.CreateInstance(dataType);
if (data is IRhspData)
{
IRhspData hd = (IRhspData)data;
hd.DataID = new RhspDataID(element.Element(hda.ID).Value);
hd.FromElement(element, this);
}
else
{
throw new NotSupportedException(
"The data type must implement interface " +
typeof(IRhspData).Name + " for an instance " +
"to be created from an XML element.");
}
return(data);
}
catch (TargetInvocationException ex)
{
// Rethrow the target invocation exception, but pull the message to the top.
throw new TargetInvocationException(ex.InnerException.Message, ex.InnerException);
}
}
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 delete(RhspDataID dataID, Type dataType)
{
IRhspData data = (IRhspData)getSingleOfType(dataID, dataType);
deleteWithoutSave(dataID, dataType, ConfigDocument);
if (data is IRhspDataParent)
{
// Set each child to deleted, then process.
IRhspDataParent dataParent = (IRhspDataParent)data;
List <IRhspDataChild> childList = dataParent.GetDataChildren().ToList();
// Process all the marked deletions.
childList.ForEach(c => c.PendingAction = ChildPendingAction.Delete);
}
}
private void updateChildDataParent(IRhspData data)
{
if (data is IRhspDataParent)
{
IRhspDataParent parent = (IRhspDataParent)data;
// Apply parent ID to all child data.
parent.GetDataChildren().ToList().ForEach(
c =>
{
c.ParentID = data.DataID;
c.Parent = parent;
}
);
}
}
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);
}
public void Update(IRhspData data)
{
updateChildDataParent(data);
update(data, ConfigDocument);
}
