Package org.datanucleus.store.valuegenerator

Value Generation.

See: Description

Interface Summary

Interface	Description
ValueGenerationConnectionProvider	Connection provider for a ValueGenerator that requires connections to their datastore.
ValueGenerationManager	Manager for the creation of ValueGenerators.
ValueGenerator<T>	Generator interface for values.

Class Summary

Class	Description
AbstractConnectedGenerator<T>	Abstract representation of a ValueGenerator requiring a connection to a datastore.
AbstractGenerator<T>	Abstract value generator.
AbstractUUIDGenerator	Value generator for a UUID format.
AUIDGenerator	This generator uses a Java implementation of DCE UUIDs to create unique identifiers without the overhead of additional database transactions or even an open database connection.
TimestampGenerator	Value generator for timestamps.
TimestampValueGenerator	Value generator for timestamp values (millisecs).
UUIDGenerator	Value generator for a String utilising the JDK UUID class (128-bit, 36 character).
UUIDHexGenerator	Value generator for a UUID hexadecimal format.
UUIDObjectGenerator	Value generator for a UUID utilising the JDK UUID class (128-bit, 36 character).
UUIDStringGenerator	Value generator for a UUID String format.
ValueGenerationBlock<T>	Representation of a block of values.
ValueGenerationManagerImpl	Manager for the creation of ValueGenerators.

Enum Summary

Enum	Description
AbstractConnectedGenerator.ConnectionPreference

Exception Summary

Exception	Description
ValueGenerationException	General class to throw exceptions in generators.

Package org.datanucleus.store.valuegenerator Description

Value Generation. This package provides a series of classes providing generation of values. The entry point is ValueGenerationManager which is used for creating and managing the various ValueGenerators. All generators are known by a symbolic name and can be accessed from the ValueGenerationManager via that name once created. All ValueGenerators copy the JDO2 "javax.jdo.datastore.Sequence" interface method names and hence can be easily extended and implement that interface.