private static RevisionBeanHolder[] ArrayCopy(RevisionBeanHolder[] array)
{
if (array == null)
{
return(null);
}
var result = new RevisionBeanHolder[array.Length];
Array.Copy(array, 0, result, 0, array.Length);
return(result);
}
/// <summary>Returns a versioned value. </summary>
/// <param name="parameters">getter parameters</param>
/// <returns>value</returns>
public Object GetVersionedValue(RevisionGetterParameters parameters)
{
RevisionBeanHolder holderMostRecent = null;
if (Holders != null)
{
foreach (int numSet in parameters.PropertyGroups)
{
RevisionBeanHolder holder = Holders[numSet];
if (holder != null)
{
if (holderMostRecent == null)
{
holderMostRecent = holder;
}
else
{
if (holder.Version > holderMostRecent.Version)
{
holderMostRecent = holder;
}
}
}
}
}
// none found, use last full event
if (holderMostRecent == null)
{
if (LastBaseEvent == null)
{
return(null);
}
return(parameters.BaseGetter.Get(LastBaseEvent));
}
return(holderMostRecent.GetValueForProperty(parameters.PropertyNumber));
}
public override void OnUpdate(EventBean[] newData, EventBean[] oldData, NamedWindowRootViewInstance namedWindowRootView, EventTableIndexRepository indexRepository)
{
// If new data is filled, it is not a delete
RevisionEventBeanDeclared revisionEvent;
Object key;
if ((newData == null) || (newData.Length == 0))
{
// we are removing an event
revisionEvent = (RevisionEventBeanDeclared)oldData[0];
key = revisionEvent.Key;
_statePerKey.Remove(key);
// Insert into indexes for fast deletion, if there are any
foreach (EventTable table in indexRepository.GetTables())
{
table.Remove(oldData);
}
// make as not the latest event since its due for removal
revisionEvent.IsLatest = false;
namedWindowRootView.UpdateChildren(null, oldData);
return;
}
revisionEvent = (RevisionEventBeanDeclared)newData[0];
EventBean underlyingEvent = revisionEvent.UnderlyingFullOrDelta;
EventType underyingEventType = underlyingEvent.EventType;
// obtain key values
key = null;
RevisionTypeDesc typesDesc = null;
bool isBaseEventType = false;
if (underyingEventType == _baseEventType)
{
key = PropertyUtility.GetKeys(underlyingEvent, _fullKeyGetters);
isBaseEventType = true;
}
else
{
typesDesc = TypeDescriptors.Get(underyingEventType);
// if this type cannot be found, check all supertypes, if any
if (typesDesc == null)
{
IEnumerable <EventType> superTypes = underyingEventType.DeepSuperTypes;
if (superTypes != null)
{
foreach (var superType in superTypes)
{
if (superType == _baseEventType)
{
key = PropertyUtility.GetKeys(underlyingEvent, _fullKeyGetters);
isBaseEventType = true;
break;
}
typesDesc = TypeDescriptors.Get(superType);
if (typesDesc != null)
{
TypeDescriptors.Put(underyingEventType, typesDesc);
key = PropertyUtility.GetKeys(underlyingEvent, typesDesc.KeyPropertyGetters);
break;
}
}
}
}
else
{
key = PropertyUtility.GetKeys(underlyingEvent, typesDesc.KeyPropertyGetters);
}
}
// get the state for this key value
RevisionStateDeclared revisionState = _statePerKey.Get(key);
// Delta event and no full
if ((!isBaseEventType) && (revisionState == null))
{
return; // Ignore the event, its a delta and we don't currently have a full event for it
}
// New full event
if (revisionState == null)
{
revisionState = new RevisionStateDeclared(underlyingEvent, null, null);
_statePerKey.Put(key, revisionState);
// prepare revison event
revisionEvent.LastBaseEvent = underlyingEvent;
revisionEvent.Key = key;
revisionEvent.Holders = null;
revisionEvent.IsLatest = true;
// Insert into indexes for fast deletion, if there are any
foreach (EventTable table in indexRepository.GetTables())
{
table.Add(newData);
}
// post to data window
revisionState.LastEvent = revisionEvent;
namedWindowRootView.UpdateChildren(new EventBean[] { revisionEvent }, null);
return;
}
// new version
long versionNumber = revisionState.IncRevisionNumber();
// Previously-seen full event
if (isBaseEventType)
{
revisionState.Holders = null;
revisionState.BaseEventUnderlying = underlyingEvent;
}
// Delta event to existing full event
else
{
var groupNum = typesDesc.Group.GroupNum;
var holders = revisionState.Holders;
if (holders == null) // optimization - the full event sets it to null, deltas all get a new one
{
holders = new RevisionBeanHolder[_groups.Length];
}
else
{
holders = ArrayCopy(holders); // preserve the last revisions
}
// add the new revision for a property group on top
holders[groupNum] = new RevisionBeanHolder(versionNumber, underlyingEvent, typesDesc.ChangesetPropertyGetters);
revisionState.Holders = holders;
}
// prepare revision event
revisionEvent.LastBaseEvent = revisionState.BaseEventUnderlying;
revisionEvent.Holders = revisionState.Holders;
revisionEvent.Key = key;
revisionEvent.IsLatest = true;
// get prior event
RevisionEventBeanDeclared lastEvent = revisionState.LastEvent;
lastEvent.IsLatest = false;
// data to post
var newDataPost = new EventBean[] { revisionEvent };
var oldDataPost = new EventBean[] { lastEvent };
// Update indexes
foreach (EventTable table in indexRepository.GetTables())
{
table.Remove(oldDataPost);
table.Add(newDataPost);
}
// keep reference to last event
revisionState.LastEvent = revisionEvent;
namedWindowRootView.UpdateChildren(newDataPost, oldDataPost);
}