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DataNucleus Core provides the primary components of a heterogenous Java persistence solution. It supports persistence API's being layered on top of the core functionality. Also includes the JDO API.

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    Provides classes relating to the life cycle state management of a persistable object. 
    Refer to section 5.5 of the JDO 1.0 specification for a description of this type of StateManager.
    
    The org.datanucleus.enhancement.StateManager definition of a StateManager is extended by org.datanucleus.state.DNStateManager 
    providing the additional handling needed for participating in the persistence process.
    
    Each persistable object has a particular org.datanucleus.state.LifeCycleState and the associated states for each API allow transitioning between states
    using the associated methods.