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## Package org.hibernate.engine

This package contains classes that are "shared" by other packages, and implementations of some key algorithms.

See:
Description

Interface Summary
HibernateIterator | An iterator that may be "closed"
JoinSequence.Selector |
Mapping | Defines operations common to "compiled" mappings (ie.
NonFlushedChanges |
ParameterBinder.NamedParameterSource |
PersistenceContext | Holds the state of the persistence context, including the first-level cache, entries, snapshots, proxies, etc.
SessionFactoryImplementor | Defines the internal contract between the `SessionFactory` and other parts of Hibernate such as implementors of `Type`.
SessionImplementor | Defines the internal contract between the `Session` and other parts of Hibernate such as implementors of `Type` or `EntityPersister`.

Class Summary
ActionQueue | Responsible for maintaining the queue of actions related to events.
BatchFetchQueue | Tracks entity and collection keys that are available for batch fetching, and the queries which were used to load entities, which can be re-used as a subquery for loading owned collections.
Cascade | Delegate responsible for, in conjunction with the various `actions`, implementing cascade processing.
CascadeStyle | A contract for defining the aspects of cascading various persistence actions.
CascadeStyle.MultipleCascadeStyle |
CascadingAction | A session action that may be cascaded from parent entity to its children
CollectionEntry | We need an entry to tell us all about the current state of a collection with respect to its persistent state
CollectionKey | Uniquely identifies a collection instance in a particular session.
Collections | Implements book-keeping for the collection persistence by reachability algorithm
EJB3CascadeStyle | Becasue CascadeStyle is not opened and package protected, I need to subclass and override the persist alias Note that This class has to be triggered by EJB3PersistEventListener at class loading time TODO get rid of it for 3.3
EJB3CascadingAction | Because of CascadingAction constructor visibility I need a packaged friendly subclass TODO Get rid of it for 3.3
EntityEntry | We need an entry to tell us all about the current state of an object with respect to its persistent state
EntityKey | Uniquely identifies of an entity instance in a particular session by identifier.
EntityUniqueKey | Used to uniquely key an entity instance in relation to a particular session by some unique property reference, as opposed to identifier.
ExecuteUpdateResultCheckStyle | For persistence operations (INSERT, UPDATE, DELETE) what style of determining results (success/failure) is to be used.
FilterDefinition | A FilterDefinition defines the global attributes of a dynamic filter.
ForeignKeys | Algorithms related to foreign key constraint transparency
ForeignKeys.Nullifier |
IdentifierValue | A strategy for determining if an identifier value is an identifier of a new transient instance or a previously persistent transient instance.
JoinHelper |
JoinSequence |
LoadQueryInfluencers | Centralize all options which can influence the SQL query needed to load an entity.
NamedQueryDefinition | Definition of a named query, defined in the mapping metadata.
NamedSQLQueryDefinition | Definition of a named native SQL query, defined in the mapping metadata.
Nullability | Implements the algorithm for validating property values for illegal null values
ParameterBinder | Centralizes the commonality regarding binding of parameter values into PreparedStatements as this logic is used in many places.
QueryParameters |
ResultSetMappingDefinition | Keep a description of the resultset mapping
RowSelection | Represents a selection of rows in a JDBC `ResultSet`
StatefulPersistenceContext | A `PersistenceContext` represents the state of persistent "stuff" which Hibernate is tracking.
Status | Represents the status of an entity with respect to this session.
SubselectFetch |
TransactionHelper | Allows work to be done outside the current transaction, by suspending it, and performing work in a new transaction
TwoPhaseLoad | Functionality relating to Hibernate's two-phase loading process, that may be reused by persisters that do not use the Loader framework
TypedValue | An ordered pair of a value and its Hibernate type.
UnsavedValueFactory |
ValueInclusion | An enum of the different ways a value might be "included".
Versioning | Utilities for dealing with optimisitic locking values.
VersionValue | A strategy for determining if a version value is an version of a new transient instance or a previously persistent transient instance.

## Package org.hibernate.engine Description

This package contains classes that are "shared" by other packages, and implementations of some key algorithms.

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