// Creating an alias for a single class
Db4o.configure().addAlias(
new TypeAlias("com.f1.Pilot", "com.f1.Driver"));
// Accessing a .NET assembly from a Java package
Db4o.configure().addAlias(
new WildcardAlias(
"com.f1.*, F1RaceAssembly",
"com.f1.*"));
// Using a different local .NET assembly
Db4o.Configure().AddAlias(
new WildcardAlias(
"com.f1.*, F1RaceAssembly",
"com.f1.*, RaceClient"));
// Mapping a Java package onto another
Db4o.configure().addAlias(
new WildcardAlias(
"com.f1.*",
"com.f1.client*"));
// To turn generation of UUIDs and version numbers on.
Db4o.configure().generateUUIDs()
Db4o.configure().generateVersionNumbers()
// How to get at time values.
ObjectInfo objectInfo = objectContainer.ext().getObjectInfo(object);
long uuidLongPart = objectInfo.getUUID().getLongPart();
long versionNumber = objectInfo.getVersion();
long creationTimeInMillis =
TimeStampIdGenerator.idToMilliseconds(uuidLongPart);
long modificationTimeInMillis =
TimeStampIdGenerator.idToMilliseconds(versionNumber);
// Converting Java milliseconds to .NET ticks
long creationTimeInDotnetTicks =
new j4o.util.Date(creationTimeInMillis).GetTicks();
IList <Employee> employees = db.Query <Employee>(delegate(Employee e)
{
return e.FirstName.StartsWith("P");
});
Version 4.6 is now production-ready. Download it now to take advantage of some of these new features:
On the bleeding edge, our engineers have been hard at work on the 5.0 Milestone 2 release. If you are using the M1 release, or are using .NET 2.0, please upgrade as soon as possible. Many bugs were fixed and performance is much-improved.
IList cars = query.Execute();
foreach (Car car in cars){
car.Drive();
}
IList<cat> cats = objectContainer.Query<cat>(delegate (Cat cat) {
return cat.Name.Equals("Occam")
cat.Name.Equals("Zora");
});