Package com.db4o.ext

Interface Summary

Interface	Description
Db4oCallback	generic callback interface.
ExtClient	extended client functionality for the ExtObjectContainer interface.
ExtObjectContainer	extended functionality for the ObjectContainer interface.
ExtObjectServer	extended functionality for the ObjectServer interface.
ExtObjectSet	extended functionality for the ObjectSet interface.
ObjectCallbacks	callback methods.
ObjectInfo	interface to the internal reference that an ObjectContainer holds for a stored object.
ObjectInfoCollection	Interface to an iterable collection ObjectInfo objects. ObjectInfoCollection is used reference a number of stored objects.
StoredClass	the internal representation of a stored class.
StoredField	the internal representation of a field on a stored class.
SystemInfo	provides information about system state and system settings.

Class Summary

Class	Description
Db4oDatabase	Class to identify a database by it's signature.
Db4oUUID	a unique universal identify for an object.
Status	Static constants to describe the status of objects.
VirtualField	intended for future virtual fields on classes.

Exception Summary

Exception	Description
BackupInProgressException	db4o-specific exception.
CompositeDb4oException
DatabaseClosedException	db4o-specific exception.
DatabaseFileLockedException	db4o-specific exception. this Exception is thrown during any of the db4o open calls if the database file is locked by another process.
DatabaseMaximumSizeReachedException	db4o-specific exception. This exception is thrown when the database file reaches the maximum allowed size.
DatabaseReadOnlyException	db4o-specific exception. This exception is thrown when a write operation is attempted on a database in a read-only mode.
Db4oException	db4o exception wrapper: Exceptions occurring during internal processing will be proliferated to the client calling code encapsulated in an exception of this type.
Db4oFatalException
Db4oFileHeaderCorruptionException
Db4oIllegalStateException	The requested operation is not valid in the current state but the database continues to operate.
Db4oIOException	db4o-specific exception. This exception is thrown when a system IO exception is encounted by db4o process.
Db4oRecoverableException
Db4oUnexpectedException	Unexpected fatal error is encountered.
EmergencyShutdownReadOnlyException	A previous IO exception has switched the database file to read-only mode for controlled shutdown.
IncompatibleFileFormatException	db4o-specific exception. This exception is thrown when the database file format is not compatible with the applied configuration.
InvalidIDException	db4o-specific exception. This exception is thrown when the supplied object ID is incorrect (outside the scope of the database IDs).
InvalidPasswordException	db4o-specific exception. This exception is thrown when a client tries to connect to a server with a wrong password or null password.
InvalidSlotException	db4o-specific exception. This exception is thrown when db4o reads slot information which is not valid (length or address).
ObjectNotStorableException	this Exception is thrown, if objects can not be stored and if db4o is configured to throw Exceptions on storage failures.
OldFormatException	db4o-specific exception. This exception is thrown when an old file format was detected and Configuration.allowVersionUpdates(boolean) is set to false.
UnsupportedOldFormatException	This exception is thrown while reading old database files for which support has been dropped.
UnsupportedOrderingException	Ordering by non primitive fields works only for classes that implement the Activatable interface and TransparentActivationSupport is enabled.