Overview (Hibernate Javadocs)

Hibernate ORM Javadocs

Hibernate is a library for object/relation mapping (ORM). It provides:

a native API centered around SessionFactory and Session,
an implementation of the Java (or Jakarta) Persistence API (JPA), where the equivalent central interfaces are EntityManagerFactory and EntityManager,
a set of mapping annotations which augment the O/R mapping annotations defined by JPA, and which may be used with either API, and
compile-time tooling for writing more type-safe code.

Native API

Along with SessionFactory and Session, applications using the native API will often make use of the following interfaces:

Configuration to configure and bootstrap Hibernate,
StatelessSession for processes involving many entity instances,
Cache to manage the second-level cache,
Transaction to control local transactions,
Query to execute HQL queries,
NativeQuery to execute native SQL queries,
Filter to manage filters,
HibernateCriteriaBuilder to construct criteria queries, and
SchemaManager to execute DDL in tests.

JPA

The JPA interfaces are defined by the JPA specification. For details see the latest specification along with the API documentation for the package jakarta.persistence.

Along with EntityManagerFactory and EntityManager, programs based on the standard JPA API often use:

Persistence to bootstrap Hibernate via JPA,
TypedQuery to execute queries,
EntityGraph to control the boundaries of fetched data,
EntityTransaction to control local transactions,
Metamodel to implement generic code which makes use of persistent entity classes in a reflective fashion, and
CriteriaBuilder to build JPA criteria queries.

Note that since Hibernate 5.2, the native API extends the JPA API rather than wrapping it. For example, SessionFactory extends EntityManagerFactory, and Session extends EntityManager.

It's always possible to fall back from JPA interfaces to native APIs, by calling entityManager.unwrap(Session.class), entityManagerFactory.unwrap(SessionFactory.class), or query.unwrap(Query.class). In certain cases it's also possible to access native functionality by passing a JPA-defined or Hibernate-defined hint, at the cost of a loss of type-safety.

These packages define additional extensions to the JPA APIs:

org.hibernate.query.criteria packages extensions to jakarta.persistence.criteria, and
org.hibernate.metamodel.model.domain packages extensions to jakarta.persistence.metamodel.

Mapping annotations

The mapping annotations defined by the JPA specification provide a foundation for expressing object/relational mappings in Hibernate and other JPA implementations.

The annotations in the package org.hibernate.annotations extend this foundation and accommodate more specialized requirements. These annotation are not tied to the native API, and may be used in conjunction with the JPA API.

The full power of Hibernate can only be unlocked via judicious use of these extra annotations.

XML-based mappings

Annotation-based mappings are the best choice for most users, but Hibernate offers XML-based mappings as an alternative.

The JPA-standard XML schema is orm_3_0.xsd.
Hibernate extends this schema with some additional mapping elements. The extended schema is mapping-3.1.0.xsd.
Prior to the existence of JPA, Hibernate had its own format for XML-based mappings, which still works, though it has not been improved in a long time. The DTD is hibernate-mapping-3.0.dtd

Bootstrapping Hibernate

There are four basic ways to obtain an instance of Hibernate:

as a JPA persistence provider, by using Persistence.createEntityManagerFactory(java.lang.String),
by using the "simplified" Configuration API,
for those who enjoy dirty hands, by using the APIs in org.hibernate.boot, or
in a container environment like WildFly or Quarkus, by letting the container take care of the bootstrap process and of injecting the EntityManagerFactory or SessionFactory.

All major Java application servers and microservice frameworks come with built-in support for Hibernate. Such container environments also typically feature facilities to automatically manage the lifecycle of a EntityManager or Session and its association with container-managed transactions.

Example configuration files for JPA and native usage may be found here. A comprehensive list of configuration properties understood by Hibernate may be found in the class AvailableSettings. Most sensible programs will only ever need to use a tiny handful of them.

Annotations driving compile-time tooling

The annotations defined by org.hibernate.annotations.processing instruct the Metamodel Generator to validate HQL at compile time, and to automatically generate the implementation of finder methods and query methods.

Popular extension points

Hibernate offers an enormous wealth of extension points for customizing almost any aspect of its implementation. Most of these extension points are far too technical to be of interest to the typical application developer.

However, the following extension points are of quite general interest:

org.hibernate.boot.model.naming allows the quantity of repetitive O/R mapping metadata to be minimized via the use of naming strategies,
org.hibernate.type.descriptor.jdbc and org.hibernate.type.descriptor.java contain the built-in JdbcTypes and JavaTypes for "compositional" basic attribute type mappings,
org.hibernate.usertype defines support for user-defined custom attribute types,
org.hibernate.generator defines support for generated attribute values,
org.hibernate.context.spi defines support for context-bound "current" sessions and contextual multi-tenancy, and
org.hibernate.binder allows for user-defined mapping annotations.

More advanced extension points include:

org.hibernate.dialect provides a framework for modelling dialects of SQL,
org.hibernate.cache.spi defines an SPI for integrating with second-level cache providers,
org.hibernate.engine.jdbc.connections.spi defines an SPI for integrating with JDBC connection pools.

Finally, Hibernate ORM Core is itself a framework for advanced extensions like Hibernate Search, Hibernate Reactive, and Envers, which do much more than just implementing a single well-defined extension point. The starting points for such extensions are found in the packages org.hibernate.integrator.spi and org.hibernate.event.spi.

Package categories

The organization of code into packages is based on the following classification:

API packages include classes and interfaces which are used directly by a typical application. These packages never have spi nor internal in their name, and are not under the namespace org.hibernate.testing.
SPI packages include classes and interfaces which are used by integrators, library developers, and framework developers to develop extensions to Hibernate, or to alter its behavior in some way. These packages usually have spi in their name.
Some classes and interfaces are considered part of the internal implementation of Hibernate. This category includes packages with internal in their name, along with any class or interface annotated @Internal. Clients should avoid depending directly on these types.
The hibernate-testing module, and the namespace org.hibernate.testing contain testing support used in the Hibernate test suite.

More information

Complete documentation may be found online at http://hibernate.org/orm/documentation/.

Packages
Package	Description
org.hibernate	This package defines the central Hibernate APIs, beginning with `SessionFactory`, which represents an instance of Hibernate at runtime and is the source of new instances of `Session` and `StatelessSession`, the most important APIs exposing persistence-related operations for entities.
org.hibernate.action.internal	The various concrete action implementations.
org.hibernate.action.spi	This SPI package defines an abstraction over the notion of an "action" which is scheduled for asynchronous execution by the event listeners.
org.hibernate.agroal.internal	Implementation of ConnectionProvider using Agroal.
org.hibernate.annotations	A set of mapping annotations which extend the O/R mapping annotations defined by JPA.
org.hibernate.annotations.processing	Annotations used to drive annotation processors: `@Find` is used to generate finder methods using the Metamodel Generator, `@HQL` and `@SQL` are used to generate query methods using the Metamodel Generator, and `CheckHQL` instructs the Query Validator to check all HQL queries in the annotated package or type.
org.hibernate.binder	This package defines an easy way to extend Hibernate with user-defined annotations that define customized O/R mappings of annotated entities and annotated entity attributes.
org.hibernate.binder.internal	Built-in implementations of `AttributeBinder` and `TypeBinder`.
org.hibernate.boot	This package contains the interfaces that make up the bootstrap API for Hibernate.
org.hibernate.boot.archive.internal	The internals of archive scanning support.
org.hibernate.boot.archive.scan.internal
org.hibernate.boot.archive.scan.spi	SPI for scanning archives to discover managed classes and named resources.
org.hibernate.boot.archive.spi	Defines a model for archives which may be `scanned` to discover managed classes and named resources.
org.hibernate.boot.beanvalidation	Support for integrating Jakarta Bean Validation.
org.hibernate.boot.cfgxml.internal	Implementation of the service for processing and handling `cfg.xml` files.
org.hibernate.boot.cfgxml.spi	An SPI service for processing and handling `cfg.xml` files.
org.hibernate.boot.internal
org.hibernate.boot.jaxb	JAXB support for `orm.xml` and `hbm.xml` mapping files
org.hibernate.boot.jaxb.cfg.spi
org.hibernate.boot.jaxb.hbm.internal	JAXB details.
org.hibernate.boot.jaxb.hbm.spi
org.hibernate.boot.jaxb.hbm.transform
org.hibernate.boot.jaxb.internal
org.hibernate.boot.jaxb.internal.stax	Contains basic support for Java XML Processing (JAXP) via Streaming API for XML (StAX)
org.hibernate.boot.jaxb.mapping
org.hibernate.boot.jaxb.mapping.marshall
org.hibernate.boot.jaxb.spi
org.hibernate.boot.model	This package defines the boot-time metamodel, which is an interpretation of the domain model (entity classes, embeddable classes, and attributes) and the mapping of these "domain model parts" to the database.
org.hibernate.boot.model.convert.internal
org.hibernate.boot.model.convert.spi	Defines the SPI of a registry of JPA `AttributeConverter`s.
org.hibernate.boot.model.internal
org.hibernate.boot.model.naming	This API allows intervention by generic code in the process of determining the names of database objects (tables, columns, and constraints).
org.hibernate.boot.model.process.internal
org.hibernate.boot.model.process.spi	Defines an SPI used during the process of transforming mapping sources into the `Metadata` reference.
org.hibernate.boot.model.relational	Some SPIs related to DDL generation and schema management.
org.hibernate.boot.model.relational.internal
org.hibernate.boot.model.source.internal
org.hibernate.boot.model.source.internal.annotations
org.hibernate.boot.model.source.internal.hbm
org.hibernate.boot.model.source.spi
org.hibernate.boot.query	Support for handling named queries during the bootstrap process.
org.hibernate.boot.registry	Defines service registry contracts a program may use for configuring Hibernate.
org.hibernate.boot.registry.classloading.internal	The class loading service internals.
org.hibernate.boot.registry.classloading.spi	The class loading service SPI.
org.hibernate.boot.registry.internal	The internals for building service registries.
org.hibernate.boot.registry.selector	Defines a feature set around named registration of implementations of various contracts and the ability to select those implementations.
org.hibernate.boot.registry.selector.internal	Internals for building StrategySelector
org.hibernate.boot.registry.selector.spi	Defines actual contract used for strategy selection.
org.hibernate.boot.spi	A range of SPIs allowing integration with—and customization of—the process of building metadata.
org.hibernate.boot.xsd	Support for XSD handling.
org.hibernate.bytecode	This package defines an SPI for integrating bytecode libraries with Hibernate.
org.hibernate.bytecode.enhance
org.hibernate.bytecode.enhance.internal.bytebuddy	package containing bytecode enhancement code (internals)
org.hibernate.bytecode.enhance.internal.tracker	specialized classes to keep track of changes
org.hibernate.bytecode.enhance.spi	Package defining bytecode code enhancement (instrumentation) support.
org.hibernate.bytecode.enhance.spi.interceptor	Support for bytecode interceptor implementations.
org.hibernate.bytecode.internal
org.hibernate.bytecode.internal.bytebuddy	Byte Buddy support internals
org.hibernate.bytecode.internal.none
org.hibernate.bytecode.spi	Package defining bytecode code enhancement (instrumentation) support.
org.hibernate.c3p0.internal	Implementation of ConnectionProvider using the c3p0 Connection pool.
org.hibernate.cache	This package defines the API of the second-level cache service.
org.hibernate.cache.cfg.internal	Implementation of the second-level cache configuration SPI.
org.hibernate.cache.cfg.spi	An SPI modelling various aspects of the second-level cache configuration.
org.hibernate.cache.internal	Internal implementations and support for second-level caching.
org.hibernate.cache.jcache	Hibernate caching provider for JSR-107 compliant caches.
org.hibernate.cache.jcache.internal
org.hibernate.cache.spi	Defines the integration aspect of Hibernate's second-level caching, allowing a "caching backend" to be plugged in as a cache provider.
org.hibernate.cache.spi.access	Defines contracts for transactional and concurrent access to cached entity and collection data.
org.hibernate.cache.spi.entry	This package defines formats for disassembled state kept in the second level cache.
org.hibernate.cache.spi.support	This package provides a framework intended to reduce the work needed to implement a caching provider.
org.hibernate.cfg	This package defines APIs for configuring Hibernate.
org.hibernate.classic	This package historically provided backward-compatibility with Hibernate 2.1 APIs which were deprecated in Hibernate 3.
org.hibernate.collection.internal	Internal implementations and support for persistent collections.
org.hibernate.collection.spi	This package defines the SPI of a framework for lazy-initializing and state-tracking collection wrappers.
org.hibernate.context	Contains SPIs which define: the notion of a context-bound or "current" session, and the notion of a "current" tenant id.
org.hibernate.context.internal	Internal implementations and support around "current session" handling.
org.hibernate.context.spi	SPI-level contracts around "current session" and "current tenant" support.
org.hibernate.dialect	This package abstracts over the multifarious dialects of SQL understood by the databases supported by Hibernate.
org.hibernate.dialect.aggregate	Support for `Dialect`-specific aggregate column types, including user-defined composite types, and JSON or XML types.
org.hibernate.dialect.function	Contains implementations of `SqmFunctionDescriptor` describing a range of relatively-sophisticated SQL functions available in various dialects.
org.hibernate.dialect.function.array
org.hibernate.dialect.hint	Support for query hints using `Dialect`-specific syntax.
org.hibernate.dialect.identity	Support for `Dialect`-specific identity column handling.
org.hibernate.dialect.lock	Support for `Dialect`-specific locking strategies.
org.hibernate.dialect.pagination	Support for `Dialect`-specific pagination strategies.
org.hibernate.dialect.sequence	Support for `Dialect`-specific sequence handling.
org.hibernate.dialect.temptable	Support for temporary tables.
org.hibernate.dialect.unique	Support for `Dialect`-specific unique constraint definition.
org.hibernate.engine	This package contains classes which are "shared" by other subsystems, and implementations of some key algorithms.
org.hibernate.engine.config.internal	The built-in implementation of the configuration service.
org.hibernate.engine.config.spi	Defines the SPI of the configuration service.
org.hibernate.engine.internal	Support for many of the internal workings of Hibernate.
org.hibernate.engine.jdbc	Support for various aspects of JDBC interaction.
org.hibernate.engine.jdbc.batch	Support for JDBC statement batching.
org.hibernate.engine.jdbc.batch.internal	Internals for JDBC batching support.
org.hibernate.engine.jdbc.batch.spi	Defines contracts for JDBC batching support.
org.hibernate.engine.jdbc.connections.internal	Various implementations of the SPI contracts for obtaining JDBC `Connection`s.
org.hibernate.engine.jdbc.connections.spi	Defines SPI contracts for obtaining JDBC `Connection`s from a provider implemented as a service.
org.hibernate.engine.jdbc.cursor.internal	Internals for JDBC REF_CURSOR support.
org.hibernate.engine.jdbc.cursor.spi	Defines contracts for JDBC REF_CURSOR support.
org.hibernate.engine.jdbc.dialect.internal	Internal support for Dialect resolution (from JDBC metadata) and Dialect building.
org.hibernate.engine.jdbc.dialect.spi	Contracts supporting Dialect resolution (from JDBC metadata) and Dialect building.
org.hibernate.engine.jdbc.env.internal
org.hibernate.engine.jdbc.env.spi
org.hibernate.engine.jdbc.internal	Internals for supporting various aspects of JDBC interaction
org.hibernate.engine.jdbc.mutation	Package defining support for executing mutation SQL statements produced by an entity persister or collection persister.
org.hibernate.engine.jdbc.mutation.group
org.hibernate.engine.jdbc.mutation.internal
org.hibernate.engine.jdbc.mutation.spi
org.hibernate.engine.jdbc.spi	SPI contracts supporting various aspects of JDBC interaction.
org.hibernate.engine.jndi	Support for JNDI within Hibernate
org.hibernate.engine.jndi.internal	Internal contracts defining the JNDI support within Hibernate
org.hibernate.engine.jndi.spi	The SPI contracts for integration with JNDI.
org.hibernate.engine.profile	Models the fetch profiles defined by the application.
org.hibernate.engine.profile.internal
org.hibernate.engine.query	Support for dealing with parameters of native queries.
org.hibernate.engine.query.internal
org.hibernate.engine.query.spi	An SPI for dealing with parameters of native queries.
org.hibernate.engine.spi	This package defines some central internal SPI abstractions used throughout the implementation of Hibernate.
org.hibernate.engine.transaction.internal
org.hibernate.engine.transaction.internal.jta
org.hibernate.engine.transaction.jta.platform.internal	A range of container-specific implementations of `JtaPlatform`.
org.hibernate.engine.transaction.jta.platform.spi	An SPI for integrating with container-provided implementations of JTA.
org.hibernate.engine.transaction.spi	An SPI abstracting the object which implements `Transaction`.
org.hibernate.envers
org.hibernate.envers.boot
org.hibernate.envers.boot.internal
org.hibernate.envers.boot.model
org.hibernate.envers.boot.registry.classloading
org.hibernate.envers.boot.spi
org.hibernate.envers.configuration
org.hibernate.envers.configuration.internal
org.hibernate.envers.configuration.internal.metadata
org.hibernate.envers.configuration.internal.metadata.reader
org.hibernate.envers.enhanced
org.hibernate.envers.event.spi
org.hibernate.envers.exception
org.hibernate.envers.function
org.hibernate.envers.internal
org.hibernate.envers.internal.entities
org.hibernate.envers.internal.entities.mapper
org.hibernate.envers.internal.entities.mapper.id
org.hibernate.envers.internal.entities.mapper.relation
org.hibernate.envers.internal.entities.mapper.relation.component
org.hibernate.envers.internal.entities.mapper.relation.lazy
org.hibernate.envers.internal.entities.mapper.relation.lazy.initializor
org.hibernate.envers.internal.entities.mapper.relation.lazy.proxy
org.hibernate.envers.internal.entities.mapper.relation.query
org.hibernate.envers.internal.reader
org.hibernate.envers.internal.revisioninfo
org.hibernate.envers.internal.synchronization
org.hibernate.envers.internal.synchronization.work
org.hibernate.envers.internal.tools
org.hibernate.envers.internal.tools.graph
org.hibernate.envers.internal.tools.query
org.hibernate.envers.query
org.hibernate.envers.query.criteria
org.hibernate.envers.query.criteria.internal
org.hibernate.envers.query.internal.impl
org.hibernate.envers.query.internal.property
org.hibernate.envers.query.order
org.hibernate.envers.query.order.internal
org.hibernate.envers.query.projection
org.hibernate.envers.query.projection.internal
org.hibernate.envers.strategy
org.hibernate.envers.strategy.internal
org.hibernate.envers.strategy.spi
org.hibernate.envers.tools
org.hibernate.event.internal	This package defines a default set of event listeners that implement the default behaviors of Hibernate session operations.
org.hibernate.event.service.internal	Implementation of the event listener registration service.
org.hibernate.event.service.spi	An SPI for the event listener registration service.
org.hibernate.event.spi	Defines the event types and event listener interfaces for events produced by the stateful `Session`.
org.hibernate.exception	Defines certain very important flavors of `JDBCException`, along with an SPI for interpreting product-specific `SQLException`s arising from a JDBC driver into something more uniform and meaningful.
org.hibernate.exception.internal
org.hibernate.exception.spi	An SPI for `Dialect`-specific exception interpretation and conversion.
org.hibernate.generator	This package defines an abstraction over all kinds of automatic value generation, including id generation and version number generation.
org.hibernate.generator.internal
org.hibernate.generator.values	Contains a framework of strategies for efficient retrieval of database-generated values.
org.hibernate.generator.values.internal
org.hibernate.grammars.graph
org.hibernate.grammars.hql
org.hibernate.grammars.importsql
org.hibernate.grammars.ordering
org.hibernate.graph	Implements and extends the JPA-defined entity graph API.
org.hibernate.graph.internal
org.hibernate.graph.internal.parse
org.hibernate.graph.spi	This package defines an internal SPI abstracting over implementations of the APIs defined in `org.hibernate.graph`.
org.hibernate.hikaricp.internal	Implementation of ConnectionProvider using HikariCP.
org.hibernate.id	This package and its subpackages, especially `org.hibernate.id.enhanced`, contain the built-in id generators, all of which implement either `IdentifierGenerator` or `PostInsertIdentifierGenerator`.
org.hibernate.id.enhanced	Enhanced/improved versions of table and sequence based identifier generators targeting portability and unified configuration.
org.hibernate.id.factory	Defines a service for creating id generators.
org.hibernate.id.factory.internal	Implementation of the SPI for id generator factories.
org.hibernate.id.factory.spi	Contains an SPI for id generator factories.
org.hibernate.id.insert	Contains a framework of strategies for retrieving database-generated ids.
org.hibernate.id.uuid	Contains the `UuidGenerator`.
org.hibernate.integrator.internal	Implementation of the SPI for extensions which integrate with Hibernate via the `Service` mechanism.
org.hibernate.integrator.spi	An SPI for extensions which integrate with Hibernate via the Java `ServiceLoader` facility.
org.hibernate.internal	An internal package containing implementations of central Hibernate APIs, mostly defined in `org.hibernate`.
org.hibernate.internal.build
org.hibernate.internal.log
org.hibernate.internal.util	Internal utility classes
org.hibernate.internal.util.beans
org.hibernate.internal.util.collections
org.hibernate.internal.util.compare
org.hibernate.internal.util.config
org.hibernate.internal.util.securitymanager
org.hibernate.internal.util.type
org.hibernate.internal.util.xml
org.hibernate.jdbc	A small API allowing the client of a Hibernate session to interact directly with JDBC, using the same connection and transaction obtained by the session.
org.hibernate.jpa	The packages in this namespace are responsible for implementing certain requirements of the JPA specification, especially things which are only needed when Hibernate is acting as a JPA persistence provider.
org.hibernate.jpa.boot.internal
org.hibernate.jpa.boot.spi	An SPI used to initiate and control the JPA bootstrap process, along with SPI interfaces allowing certain sorts of extensions to be contributed during the bootstrap process.
org.hibernate.jpa.event.internal	Internal details of implementing support for JPA callbacks
org.hibernate.jpa.event.spi	The SPI contracts for supporting JPA lifecycle callbacks.
org.hibernate.jpa.internal	Defines Hibernate implementation of Java Persistence specification.
org.hibernate.jpa.internal.enhance
org.hibernate.jpa.internal.util
org.hibernate.jpa.spi	An SPI for managing cases where, by default, Hibernate intentionally violates the letter of the JPA specification.
org.hibernate.jpamodelgen
org.hibernate.loader	This package defines functionality for processing JDBC result sets and returning complex graphs of persistent objects.
org.hibernate.loader.ast.internal
org.hibernate.loader.ast.spi
org.hibernate.loader.internal
org.hibernate.mapping	This package defines the Hibernate configuration-time mapping model.
org.hibernate.metadata	This package defines an API for accessing details about model mapping.
org.hibernate.metamodel	This package defines an API for accessing the runtime metamodel describing persistent entities in Java and their mappings to the relational database schema.
org.hibernate.metamodel.internal
org.hibernate.metamodel.mapping	Defines the runtime mapping metamodel, which describes the mapping of the application's domain model parts (entities, attributes) to relational database objects (tables, columns).
org.hibernate.metamodel.mapping.internal
org.hibernate.metamodel.mapping.ordering	Support for set and map ordering
org.hibernate.metamodel.mapping.ordering.ast
org.hibernate.metamodel.model.domain	Defines the runtime domain metamodel, which describes the Java aspect of the application's domain model parts (entities, attributes).
org.hibernate.metamodel.model.domain.internal	Implementation of the SPI for the runtime domain metamodel.
org.hibernate.metamodel.model.domain.spi	An SPI for the runtime domain metamodel.
org.hibernate.metamodel.spi	An SPI supporting custom instantiation of entity instances and embeddable objects.
org.hibernate.persister.collection	This package abstracts persistence mechanisms for collections.
org.hibernate.persister.collection.mutation	Defines support for performing mutation operations against collections.
org.hibernate.persister.entity	This package abstracts persistence mechanisms for entities.
org.hibernate.persister.entity.mutation	Defines support for performing mutation operations originating from persistence-context events.
org.hibernate.persister.internal	Built-in implementation of the SPI for integrating entity and collection persisters.
org.hibernate.persister.spi	An SPI for integrating custom entity and collection persisters.
org.hibernate.persister.walking.spi	Package for "walking" associations through metadata definition.
org.hibernate.pretty	Contains some functions for pretty-printing things for exception and log messages.
org.hibernate.procedure	Defines support for executing database stored procedures and functions and accessing their outputs.
org.hibernate.procedure.internal	Defines the internal implementation of the stored procedure SPI.
org.hibernate.procedure.spi	Defines an SPI for calling stored procedures and functions.
org.hibernate.processor	The main package of this annotation processor.
org.hibernate.processor.annotation	Implementation of the model classes backed by annotations.
org.hibernate.processor.model
org.hibernate.processor.util	Helper classes for string and type processing as well as access type detection.
org.hibernate.processor.util.xml	XML helper classes.
org.hibernate.processor.validation	Validation for HQL queries.
org.hibernate.processor.xml	Implementation of the model classes backed by annotations.
org.hibernate.processor.xml.jaxb
org.hibernate.property.access.internal	Contains various implementations of `PropertyAccessStrategy`.
org.hibernate.property.access.spi	An SPI abstracting how persistent attributes of an entity or embeddable type are accessed by Hibernate.
org.hibernate.proxool.internal	Implementation of ConnectionProvider using the proxool Connection pool.
org.hibernate.proxy	This package defines a framework for lazy-initializing entity proxies.
org.hibernate.proxy.map	Proxies for entity objects represented as Java maps.
org.hibernate.proxy.pojo	Proxies for plain Java objects.
org.hibernate.proxy.pojo.bytebuddy
org.hibernate.query	Everything related to HQL/JPQL, native SQL, and criteria queries.
org.hibernate.query.criteria	The JPA-standard criteria query API defines all the operations needed express any query written in standard JPQL.
org.hibernate.query.criteria.internal
org.hibernate.query.criteria.spi	SPI for extending `HibernateCriteriaBuilder` with additional functionality by registering a `Service`.
org.hibernate.query.derived
org.hibernate.query.hql	Package defining support for HQL, including JPQL as a subset of HQL.
org.hibernate.query.hql.internal	Implementation of the SPIs for HQL support.
org.hibernate.query.hql.spi	SPIs for HQL support.
org.hibernate.query.internal
org.hibernate.query.named	Support for named queries
org.hibernate.query.procedure	Support SQL functions in the SQM model.
org.hibernate.query.results	Support for defining result set mappings used in `NativeQuery`, `ProcedureCall`, and `StoredProcedureQuery`.
org.hibernate.query.results.complete	Support for immutable result/fetch builder graph nodes built from static sources such as `SqlResultSetMapping` or the `hbm.xml` mapping element `<resultset/>`.
org.hibernate.query.results.dynamic	Support for mutable result/fetch builder graphs nodes built dynamically via Hibernate's `NativeQuery` APIs
org.hibernate.query.results.implicit	Defines support for implicit ResultSet mappings.
org.hibernate.query.spi	Contains a range of internal abstractions for dealing with query execution, query plans, query options, and query parameters.
org.hibernate.query.sql	Package defining support for native SQL queries.
org.hibernate.query.sql.internal	Implementation of the SPIs for native SQL query support.
org.hibernate.query.sql.spi	SPIs for native SQL query support.
org.hibernate.query.sqm	This package defines a semantic model of HQL queries.
org.hibernate.query.sqm.function	An SPI for defining, registering, and rendering functions in HQL.
org.hibernate.query.sqm.internal	Package for the SQM-backed Query implementation details
org.hibernate.query.sqm.mutation.internal
org.hibernate.query.sqm.mutation.internal.cte
org.hibernate.query.sqm.mutation.internal.inline
org.hibernate.query.sqm.mutation.internal.temptable	Support for multi-table SQM mutation (insert, update, delete) operations using a table to temporarily hold the matching ids.
org.hibernate.query.sqm.mutation.spi	SPI for handling SQM UPDATE and DELETE queries
org.hibernate.query.sqm.produce.function	Package defining support for `SqmFunctionDescriptor` handling.
org.hibernate.query.sqm.produce.function.internal
org.hibernate.query.sqm.spi	SPI-level SQM contracts
org.hibernate.query.sqm.sql	Package for the translation of SQM into SQL AST
org.hibernate.query.sqm.sql.internal
org.hibernate.query.sqm.tree	This package contains the classes that make up the SQM tree nodes.
org.hibernate.query.sqm.tree.cte	Nodes representing common table expressions (CTE) in the SQM tree.
org.hibernate.query.sqm.tree.delete	Nodes representing `delete` statements in the SQM tree.
org.hibernate.query.sqm.tree.domain	Nodes representing path expressions in the SQM tree.
org.hibernate.query.sqm.tree.expression	Nodes representing expressions in the SQM tree.
org.hibernate.query.sqm.tree.from	Nodes representing root entities and joins in the SQM tree.
org.hibernate.query.sqm.tree.insert	Nodes representing `insert` statements in the SQM tree.
org.hibernate.query.sqm.tree.jpa
org.hibernate.query.sqm.tree.predicate	Nodes representing logical predicates in the SQM tree.
org.hibernate.query.sqm.tree.select	Nodes representing `select` statements in the SQM tree.
org.hibernate.query.sqm.tree.update	Nodes representing `update` statements in the SQM tree.
org.hibernate.relational	Programmatic access to the schema management tool.
org.hibernate.relational.internal
org.hibernate.resource.beans.container.internal	An implementation of the bean container SPI based on CDI.
org.hibernate.resource.beans.container.spi	An SPI abstracting over CDI-like bean containers.
org.hibernate.resource.beans.internal
org.hibernate.resource.beans.spi	Defines an SPI for integration with CDI-like containers.
org.hibernate.resource.jdbc	A facility for managing logical JDBC connections and keeping track of other heavyweight resources.
org.hibernate.resource.jdbc.internal	Implementation of the SPI for managing JDBC connections and other heavyweight resources.
org.hibernate.resource.jdbc.spi	An SPI for managing JDBC connections and other heavyweight resources, based around the idea of a "JDBC session".
org.hibernate.resource.transaction	Defines the resource-level transaction capabilities of Hibernate, centered around the `TransactionCoordinator` contract.
org.hibernate.resource.transaction.backend.jdbc.internal	An implementation of `TransactionCoordinator` based on `JdbcResourceTransaction`.
org.hibernate.resource.transaction.backend.jdbc.spi	An SPI which models the concept of a JDBC resource-level transaction.
org.hibernate.resource.transaction.backend.jta.internal	Implementations of `TransactionCoordinator` based on JTA.
org.hibernate.resource.transaction.backend.jta.internal.synchronization	Internal implementation details for reacting to JTA transaction completion via `Synchronization` callbacks
org.hibernate.resource.transaction.internal	Internal implementation details for the resource-level transaction capabilities of Hibernate.
org.hibernate.resource.transaction.spi	Extended SPI contracts for the resource-level transaction capabilities of Hibernate.
org.hibernate.result	Defines support for dealing with results returned from database via JDBC.
org.hibernate.result.internal
org.hibernate.result.spi
org.hibernate.service	Defines a framework for pluggable services, allowing for customization of key components of Hibernate, and abstraction of these components as SPI interfaces.
org.hibernate.service.internal	Implementation of the SPI for integrating pluggable services.
org.hibernate.service.spi	Defines an SPI for integrating pluggable services.
org.hibernate.spatial
org.hibernate.spatial.contributor
org.hibernate.spatial.criteria
org.hibernate.spatial.criteria.internal
org.hibernate.spatial.dialect.cockroachdb	`SpatialDialect`s for CockroachDB
org.hibernate.spatial.dialect.db2
org.hibernate.spatial.dialect.h2gis
org.hibernate.spatial.dialect.hana
org.hibernate.spatial.dialect.mariadb
org.hibernate.spatial.dialect.mysql
org.hibernate.spatial.dialect.oracle
org.hibernate.spatial.dialect.postgis
org.hibernate.spatial.dialect.sqlserver
org.hibernate.spatial.integration
org.hibernate.spatial.jts
org.hibernate.spatial.predicate
org.hibernate.spi	A tiny SPI for dealing with compound names and navigable paths.
org.hibernate.sql	This package contains helper classes for rendering SQL fragments and SQL statements.
org.hibernate.sql.ast	Package defining a SQL AST for use in generation of SQL.
org.hibernate.sql.ast.internal
org.hibernate.sql.ast.spi	Package defining support for creating and consuming a SQL AST.
org.hibernate.sql.ast.tree	Package defining the SQL AST.
org.hibernate.sql.ast.tree.cte	Support for common table expressions (CTE) in a SQL tree.
org.hibernate.sql.ast.tree.delete	AST nodes representing `delete` statements in a SQL tree.
org.hibernate.sql.ast.tree.expression	AST nodes representing expressions in a SQL tree.
org.hibernate.sql.ast.tree.from	AST nodes representing root tables and joins in a SQL tree.
org.hibernate.sql.ast.tree.insert	AST nodes representing `insert` statements in a SQL tree.
org.hibernate.sql.ast.tree.predicate	AST nodes representing logical predicates in a SQL tree.
org.hibernate.sql.ast.tree.select	AST nodes representing `select` statements in a SQL tree.
org.hibernate.sql.ast.tree.update	AST nodes representing `update` statements in a SQL tree.
org.hibernate.sql.exec	Support for execution of SQL statements via JDBC.
org.hibernate.sql.exec.internal	Implementation of the SPI for execution of SQL statements via JDBC.
org.hibernate.sql.exec.spi	SPI for execution of SQL statements via JDBC.
org.hibernate.sql.model	Package contains specialized SQL AST nodes and builders for table mutations of model parts originating from normal persistence-context events.
org.hibernate.sql.model.ast	SQL AST extensions for model mutations.
org.hibernate.sql.model.ast.builder	Support for building `TableMutation` references for persisting entity mutation events
org.hibernate.sql.model.internal	Concrete implementations of `MutationGroup`, `MutationOperation`, and `TableMutation`.
org.hibernate.sql.model.jdbc	Extensions to `JdbcOperation` for model mutations.
org.hibernate.sql.results	Package for processing JDBC `ResultSet`s into hydrated domain model graphs based on a "load plan" defined by a "domain result graph", that is, one or more `DomainResult` nodes with zero or more `Fetch` nodes.
org.hibernate.sql.results.caching	Support for caching of query results.
org.hibernate.sql.results.caching.internal
org.hibernate.sql.results.graph	Defines domain result graphs.
org.hibernate.sql.results.graph.basic
org.hibernate.sql.results.graph.collection
org.hibernate.sql.results.graph.collection.internal
org.hibernate.sql.results.graph.embeddable
org.hibernate.sql.results.graph.embeddable.internal
org.hibernate.sql.results.graph.entity
org.hibernate.sql.results.graph.entity.internal
org.hibernate.sql.results.graph.instantiation
org.hibernate.sql.results.graph.instantiation.internal
org.hibernate.sql.results.graph.internal
org.hibernate.sql.results.graph.tuple
org.hibernate.sql.results.internal
org.hibernate.sql.results.internal.domain
org.hibernate.sql.results.jdbc.internal
org.hibernate.sql.results.jdbc.spi
org.hibernate.sql.results.spi
org.hibernate.stat	This package exposes statistics about a running instance of `SessionFactory` and its interaction with the database and second-level cache.
org.hibernate.stat.internal	The built-in implementation of the statistics collection service.
org.hibernate.stat.spi	An SPI allowing customized statistics collection.
org.hibernate.testing
org.hibernate.testing.async
org.hibernate.testing.boot
org.hibernate.testing.bytecode.enhancement
org.hibernate.testing.bytecode.enhancement.extension
org.hibernate.testing.bytecode.enhancement.extension.engine
org.hibernate.testing.byteman
org.hibernate.testing.cache
org.hibernate.testing.cleaner
org.hibernate.testing.common.connections
org.hibernate.testing.env
org.hibernate.testing.hamcrest
org.hibernate.testing.jdbc
org.hibernate.testing.jdbc.leak
org.hibernate.testing.jta
org.hibernate.testing.junit4
org.hibernate.testing.logger
org.hibernate.testing.orm
org.hibernate.testing.orm.assertj
org.hibernate.testing.orm.domain
org.hibernate.testing.orm.domain.animal	Standard model for Hibernate's legacy Animal model used in HQL testing
org.hibernate.testing.orm.domain.contacts
org.hibernate.testing.orm.domain.gambit
org.hibernate.testing.orm.domain.helpdesk
org.hibernate.testing.orm.domain.retail
org.hibernate.testing.orm.domain.userguide
org.hibernate.testing.orm.domain.userguide.tooling
org.hibernate.testing.orm.jdbc
org.hibernate.testing.orm.jpa
org.hibernate.testing.orm.junit
org.hibernate.testing.orm.logger
org.hibernate.testing.orm.transaction
org.hibernate.testing.schema
org.hibernate.testing.transaction
org.hibernate.testing.util
org.hibernate.testing.util.jpa
org.hibernate.testing.util.uuid
org.hibernate.tool.schema	Contains tooling related to DDL generation, export, migration, and validation.
org.hibernate.tool.schema.extract.internal	Implementation of the SPI for schema information extraction from the database via JDBC.
org.hibernate.tool.schema.extract.spi	Defines an SPI for schema information extraction from the database via JDBC.
org.hibernate.tool.schema.internal	An implementation of the SPI for the tooling related to DDL generation, export, migration, and validation.
org.hibernate.tool.schema.internal.exec	Support for exporting generated DDL to the database or to SQL scripts.
org.hibernate.tool.schema.internal.script	Support for reading SQL scripts supplied to the schema tooling.
org.hibernate.tool.schema.spi	An SPI for tooling related to DDL generation, export, migration, and validation.
org.hibernate.transform	Defines strategies for post-processing criteria query results into a form convenient to the application.
org.hibernate.tuple	Most contracts here have been replaced by the new runtime mapping model.
org.hibernate.tuple.component
org.hibernate.tuple.entity
org.hibernate.type	A Hibernate `Type` is a strategy for mapping a Java property type to a JDBC type or types.
org.hibernate.type.descriptor	Contracts for reading and writing values to and from JDBC.
org.hibernate.type.descriptor.converter.internal	Implements the SPI for basic-typed value conversions.
org.hibernate.type.descriptor.converter.spi	An SPI for basic-typed value conversions, including support for handling JPA `AttributeConverter` instances as part of the Hibernate `Type` system.
org.hibernate.type.descriptor.java	Integrates a range of types defined by the JDK with the type system of Hibernate.
org.hibernate.type.descriptor.java.spi
org.hibernate.type.descriptor.jdbc	Defines handling of almost the full range of standard JDBC-defined SQL data types.
org.hibernate.type.descriptor.jdbc.internal
org.hibernate.type.descriptor.jdbc.spi
org.hibernate.type.descriptor.sql	An API for working with abstract families of DDL types parameterized by varying length, precision, and scale.
org.hibernate.type.descriptor.sql.internal	Includes several general-purpose implementations of `DdlType`.
org.hibernate.type.descriptor.sql.spi	Defines a registry for `DdlType`s.
org.hibernate.type.format	Support for type mappings which format composite values to a structured text format (JSON or XML) for storage in a database-specific column type supporting that structured format.
org.hibernate.type.format.jackson	Implementations of `FormatMapper` using Jackson.
org.hibernate.type.format.jakartajson	An implementation of `FormatMapper` using Jakarta JSON.
org.hibernate.type.format.jaxb	An implementation of `FormatMapper` using JAXB.
org.hibernate.type.internal
org.hibernate.type.spi	Defines a registry for Hibernate `Type`s.
org.hibernate.usertype	An API for user-defined custom types which extend the set of built-in types defined in `org.hibernate.type`.
org.hibernate.usertype.internal
org.hibernate.vibur.internal	Implementation of ConnectionProvider using ViburDBCP.

Hibernate Javadoc (6.6.2.Final)