public long GetNextSequence(XPClassInfo classInfo)
{
if (classInfo == null)
throw new ArgumentNullException("classInfo");
XPClassInfo ci = classInfo;
//Dennis: Uncomment this code if you want to have the SequentialNumber column created in each derived class table.
while (ci.BaseClass != null && ci.BaseClass.IsPersistent) {
ci = ci.BaseClass;
}
_seq = euow.GetObjectByKey<Sequence>(ci.FullName, true);
if (_seq == null) {
throw new InvalidOperationException(string.Format("Sequence for the {0} type was not found.",
ci.FullName));
}
long nextSequence = _seq.NextSequence;
_seq.NextSequence++;
euow.FlushChanges();
return nextSequence;
}
//Dennis: It is necessary to generate (only once) sequences for all the persistent types before using the GetNextSequence method.
public static void RegisterSequences(IEnumerable<ITypeInfo> persistentTypes)
{
if (persistentTypes != null)
using (var uow = new UnitOfWork(DefaultDataLayer)) {
var sequenceList = new XPCollection<Sequence>(uow);
var typeToExistsMap = new Dictionary<string, bool>();
foreach (Sequence seq in sequenceList) {
typeToExistsMap[seq.TypeName] = true;
}
foreach (ITypeInfo typeInfo in persistentTypes) {
ITypeInfo ti = typeInfo;
if (typeToExistsMap.ContainsKey(ti.FullName)) continue;
//Dennis: Uncomment this code if you want to have the SequentialNumber column created in each derived class table.
while (ti.Base != null && ti.Base.IsPersistent) {
ti = ti.Base;
}
string typeName = ti.FullName;
//Dennis: This code is required for the Domain Components only.
if (ti.IsInterface && ti.IsPersistent) {
Type generatedEntityType =
XpoTypesInfoHelper.GetXpoTypeInfoSource().GetGeneratedEntityType(ti.Type);
if (generatedEntityType != null)
typeName = generatedEntityType.FullName;
}
if (typeToExistsMap.ContainsKey(typeName)) continue;
if (ti.IsPersistent) {
typeToExistsMap[typeName] = true;
var seq = new Sequence(uow);
seq.TypeName = typeName;
seq.NextSequence = 0;
}
}
uow.CommitChanges();
}
}
