internal void Analyze()
{
SyncItem sourceSyncItem = FetchSyncItem(_sourceGuid);
SyncItem sinkSyncItem;
ISerializableObject source = FetchObject(_sourceSerializer, _sourceGuid);
if (sourceSyncItem == null)//In der Synchronisationstabelle gibt es keinen korrepondierenden Eintrag
{
#if DEBUG
logger.Debug(source.GetType().Name + ", guid=" + AttributeWorker.RowGuid(source) + " is not synchronized and will be inserted");
#endif
SyncState = new InsertState(this);
}
else //in der Synchronisationstabelle ist ein Eintrag vorhanden
{
sinkSyncItem = sourceSyncItem.CounterPart;
_sinkGuid = sinkSyncItem.SyncGuid;
ISerializableObject sink = FetchObject(_sinkSerializer, _sinkGuid); //Das korrepondierende Objekt wird aus der Zieldatenbankgeholt
if (sink == null) //Wenn es nicht vorhanden ist wurde es gelöscht
{
#if DEBUG
logger.Debug(sourceSyncItem.ClassID + ", guid=" + AttributeWorker.RowGuid(source) + " does not exist, the conflict has to be resolved");
#endif
SyncState = new DeletedState(this, sourceSyncItem);
}
else
{
String h1 = sinkSyncItem.Hashcode;
String sinkHashCode = ComputeHashCode(_sinkSerializer.Target, sink);
if (h1 != sinkHashCode)//Änderung der Daten in der Zieldatenbank--warum ist das schon ein Konflikt?
{
#if DEBUG
logger.Debug(sourceSyncItem.ClassID + ", guid=" + AttributeWorker.RowGuid(source) + " is involved in a conflict, which has to be resolved");
#endif
SyncState = new ConflictState(this, sourceSyncItem);
}
else //zieldatenbank unverändert
{
String sourceHashCode = ComputeHashCode(SourceSerializer.Target, source);
if (sourceHashCode == sourceSyncItem.Hashcode)//Quelldatenbank unverändert
{
#if DEBUG
logger.Debug(sourceSyncItem.ClassID + ", guid=" + AttributeWorker.RowGuid(source) + " has not changed and will not be synchronized");
#endif
SyncState = new IgnoreState(this);
}
else//Quelldatenbank verändert-Zieldatenbank unverändert ->update
{
#if DEBUG
logger.Debug(sourceSyncItem.ClassID + ", guid=" + AttributeWorker.RowGuid(source) + " has changed on the sourceside and will be updated");
#endif
SyncState = new UpdateState(this, sourceSyncItem);
}
}
}
}
AttributeWorker w = AttributeWorker.GetInstance(_sinkSerializer.Target);
IList <FieldInfo> fis = w.GetFieldByAttribute <CheckForeingKeyConstraintAttribute>(_synchronizedType);
foreach (FieldInfo fi in fis)
{
Object val = fi.GetValue(source);
if (val == null)
{
continue;
}
CheckForeingKeyConstraintAttribute attr = w.GetAttribute <CheckForeingKeyConstraintAttribute>(fi);
String table = attr.UnmappedTable;
String column = attr.ExternColumn;
if (column == null)
{
column = w.GetColumnMapping(fi);
}
if (!_sinkSerializer.Connector.Exists(column, val, table))
{
//Hier kann man einen neuen Status einführen, der dieses Problem abfängt
throw new InvalidOperationException("Insertion of " + _synchronizedType.Name + " will fail. Unmapped foreign key " + column + "=" + val + " does not exist in target database!");
}
}
}