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Hibernate is a powerful, high performance object/relational persistence and query service for Java. It lets you develop persistent objects following common Java idiom, including composition, association, inheritance, polymorphism, and the Java collections framework. To allow a rapid build procedure
NHibernate is a port of Hibernate Core for Java to the .NET Framework. It handles persisting plain .NET objects to and from an underlying relational database. Given an XML description of your entities and relationships, NHibernate automatically generates SQL for loading and storing the objects.
Hibernate, like all other object/relational mapping tools, requires metadata that governs the transformation of data from one representation to the other (and vice versa). As an option, you can now use JDK 5.0 annotations for object/relational mapping with Hibernate 3.2. You can use annotations in
Hibernate EntityManager implements: * The standard Java Persistence management API * The standard Java Persistence Query Language * The standard Java Persistence object lifecycle rules * The standard Java Persistence configuration and packaging Hibernate EntityManager wraps
Working with Hibernate is very easy and developers enjoy using the APIs and the query language. Even creating mapping metadata is not an overly complex task once you've mastered the basics. Hibernate Tools makes working with Hibernate or EJB 3.0 persistence even more pleasant. Hibernate Tools
Following the DRY (Don't Repeat Yourself) principle, Hibernate Validator let's you express your domain constraints once (and only once) and ensure their compliance at various level of your system automatically. Annotations are a very convenient and elegant way to specify invariant
Hibernate Search brings the power of full text search engines to the persistence domain model and Hibernate experience, through transparent configuration via annotations and a common API. Full text search engines like Apache Lucene(tm) allow applications to execute free-text search queries.
Hibernate Spatial is a generic extension to Hibernate for handling geographic data. It is generic in the sense that it works in the same way across different databases. Hibernate Spatial allows you to deal with geographic data in a standardized way, whatever database that you use (as long as a
claimed by Eclipse Foundation
CDO Model Repository ===================== CDO is both a development-time model repository and a run-time persistence framework. Being highly optimized it supports object graphs of arbitrary size. CDO offers transactions with save points, explicit locking, change notification, queries
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