1Nov 29, 2005

Object Relational Mapping Frameworks

Wiene Höweler

2Nov 29, 2005

Why ORM frameworks

Maps Object-Oriented programming objects to relational databases

Advantages reduce programming code improve performance (caching)

3Nov 29, 2005

ORM frameworks

Open source: Object Relational Bridge Castor Hibernate Simple ORM Ammentos

Vendors: Visual Paradigm for UML ADF BC (BC4J) Toplink

4Nov 29, 2005

Object Relational Bridge

Support of standard and non-standard API's (PB, OTM, ODMG, JDO)

Transparent persistence Object caching Optimistic and pessimistic Locking Allows to build massively distributed and

clustered systems Configurable persistence by reachability Dynamic XML mapping

http://db.apache.org/ojb/

5Nov 29, 2005

Castor

Castor XML: Java object model to and from XML (XML databinding).

Castor JDO: Java object persistence to RDBMS

In memory caching and write-at-commit Two phase commit transactions, object

rollback and deadlock detection OQL query mapping to SQL queries

http://castor.exolab.org

6Nov 29, 2005

Hibernate

Support for inheritance, polymorphism, composition and the Java collections framework

A variety of mappings for collections and dependent objects

No build-time bytecode enhancement Dual-layer cache architecture Support for "application" transactions

http://www.hibernate.org/

7Nov 29, 2005

Simple ORM

Object/relational mapping on top of JDBC No XML, 100% Java Allows for raw JDBC and non-Java database

access and constraints without compromising database integrity

http://simpleorm.org

8Nov 29, 2005

Ammentos

Explicitely meant for JDK5 developers Works with JDK5 annotations Automatic validation Event-driven programming supported Supports inheritance Supports transactions

http://ammentos.biobytes.it/

9Nov 29, 2005

Visual Paradigm for UML

Model sharing among diagrams Imports from ROSE Customizable SQL EJB diagram support and EJB code

generation and deployment Integrates with Eclipse/IBM WebSphere,

JBuilder, NetBeans IDE/Sun ONE, IntelliJ IDEA, JDeveloper and WebLogic Workshop.

http://www.visual-paradigm.com/product/vpuml

10Nov 29, 2005

ADF BC (BC4J)

Lightweight Java classes and corresponding XML-driven bean factories

Declaratively design master/detail UI data model, including only data needed by client for optimum performance

Declaratively enforce required fields, primary key uniqueness, data precision/scale, and foreign key references

Simplify multi-step web-based business transactions with automatic web-tier state management

http://www.oracle.com/technology/products/jdev/tips/muench/keybenefits/index.html

11Nov 29, 2005

Toplink

Offers developers excellent performance and choice, working with any database, any application server, any development toolset and process, and any J2EE architecture.

Allows Oracle hints to specify items such as the join order of a join statement or the optimization approach of a SQL call

Hierarchical queries Support for Oracle Database Types

http://www.oracle.com/technology/products/ias/toplink