HIBERNATE TUTORIAL - Introduction to Hibernate

HIBERNATE TUTORIAL

HIBERNATE - Introduction to Hibernate

Hibernate is an open source object/relational mapping tool for Java. Hibernate lets you develop persistent classes following common Java idiom - including association, inheritance, polymorphism, composition and the Java collections framework.

Hibernate not only takes care of the mapping from Java classes to database tables (and from Java data types to SQL data types), but also provides data query and retrieval facilities and can significantly reduce development time otherwise spent with manual data handling in SQL and JDBC.

Hibernates goal is to relieve the developer from 95 percent of common data persistence related programming tasks.

Hibernate is Free Software. The LGPL license is sufficiently flexible to allow the use of Hibernate in both open source and commercial projects (see the LicenseFAQ for details). Hibernate is available for download at http://www.hibernate.org/. This tutorial aims to provide insight into Hibernate version 3.0RC and its usage

Some of the main features of hibernate are listed below and we have tried to explain some of them in detail later in this tutorial.

	Transparent persistence without byte code processing
		Transparent persistence
		JavaBeans style properties are persisted
		No build-time source or byte code generation / processing
		Support for extensive subset of Java collections API
		Collection instance management
		Extensible type system
		Constraint transparency
		Automatic Dirty Checking
		Detached object support
	Object-oriented query language
		Powerful object-oriented query language
		Full support for polymorphic queries
		New Criteria queries
		Native SQL queries
	Object / Relational mappings
		Three different O/R mapping strategies
		Multiple-objects to single-row mapping
		Polymorphic associations
		Bidirectional associations
		Association filtering
		Collections of basic types
		Indexed collections
		Composite Collection Elements
		Lifecycle objects
	Automatic primary key generation
		Multiple synthetic key generation strategies
		Support for application assigned identifiers
		Support for composite keys
	Object/Relational mapping definition
		XML mapping documents
		Human-readable format
		XDoclet support
	HDLCA (Hibernate Dual-Layer Cache Architecture)
		Thread safeness
		Non-blocking data access
		Session level cache
		Optional second-level cache
		Optional query cache
		Works well with others
	High performance
		Lazy initialization
		Outer join fetching
		Batch fetching
		Support for optimistic locking with versioning/timestamping
		Highly scalable architecture
		High performance
		No "special" database tables
		SQL generated at system initialization time
		(Optional) Internal connection pooling and PreparedStatement caching
	J2EE integration
		JMX support
		Integration with J2EE architecture (optional)
		New JCA support

Hibernate tutorial

Introduction to Hibernate

Overview of Hibernate

Features of Hibernate

Getting Started with Hibernate

Hibernate O/R Mapping

Hibernate Mapping In Depth

Hibernate Query Language

Hibernate Complete Example