public static IIdSystem NewInstance(LocalObjectContainer localContainer)
{
SystemData systemData = localContainer.SystemData();
byte idSystemType = systemData.IdSystemType();
switch (idSystemType)
{
case Legacy:
{
return(new PointerBasedIdSystem(localContainer));
}
case PointerBased:
{
return(new PointerBasedIdSystem(localContainer));
}
case StackedBtree:
{
InMemoryIdSystem inMemoryIdSystem = new InMemoryIdSystem(localContainer);
BTreeIdSystem bTreeIdSystem = new BTreeIdSystem(localContainer, inMemoryIdSystem);
systemData.FreespaceIdSystem(bTreeIdSystem.FreespaceIdSystem());
return(new BTreeIdSystem(localContainer, bTreeIdSystem));
}
case SingleBtree:
{
InMemoryIdSystem smallInMemoryIdSystem = new InMemoryIdSystem(localContainer);
BTreeIdSystem smallBTreeIdSystem = new BTreeIdSystem(localContainer, smallInMemoryIdSystem
);
systemData.FreespaceIdSystem(smallBTreeIdSystem.FreespaceIdSystem());
return(smallBTreeIdSystem);
}
case InMemory:
{
return(new InMemoryIdSystem(localContainer));
}
case Custom:
{
IIdSystemFactory customIdSystemFactory = localContainer.ConfigImpl.CustomIdSystemFactory
();
if (customIdSystemFactory == null)
{
throw new Db4oFatalException("Custom IdSystem configured but no factory was found. See IdSystemConfiguration#useCustomSystem()"
);
}
return(customIdSystemFactory.NewInstance(localContainer));
}
default:
{
return(new PointerBasedIdSystem(localContainer));
break;
}
}
}