An object/relational persistence and query service for Java
BS Editor: Hibernate Core for Java generates SQL for you, relieves you from manual JDBC result set handling and object conversion, and keeps your application portable to all SQL databases.
Hibernate provides transparent persistence, the only requirement for a persistent class is a no-argument constructor. You dont even need classes, you can also persist a model using Maps of Maps, or just about anything else. You dont even need tables, Hibernate can map Entities and particular properties to SQL expressions.
Hibernate offers sophisticated query options, you can write plain SQL, object-oriented HQL (Hibernate Query Language), or Create programatic Criteria and Example queries. Hibernate can optimize object loading all the time, with various fetching and caching options.
Hibernate adapts to your development process, no matter if you start with a design from scratch or work with an existing database, and it will support any application architecture. Combined with Hibernate EntityManager and Hibernate Annotations you can use Hibernate as a certified Java Persistence provider.
Hibernate Core for Java key features:
-Natural programming model - Hibernate supports natural OO idiom; inheritance, polymorphism, composition and the Java collections framework
-Support for fine-grained object models - a rich variety of mappings for collections and dependent objects
-No build-time bytecode enhancement - theres no extra code generation or bytecode processing steps in your build procedure
-Extreme scalability - Hibernate is extremely performant, has a dual-Layer cache architecture, and may be used in a Cluster
-The query options - Hibernate addresses both sides of the problem; not only how to get objects into the database, but also how to get them out again
-Support for conversations - Hibernate supports both long-lived persistence contexts, detach/reattach of objects, and takes care of optimistic locking automatically
-Free/open source you can free download Hibernate Core for Java(Linux) 3.3.1.ga now.