ORM Tools
- 1. Object Relational Mapping (ORM) Tools Ketan Sharma iNVERTEDi
- 2. Topics • Overview • The Need • Benefits • Popular ORM Tools • Alternatives • Demonstration • References • Questions
- 3. Overview • Technique for converting data between incompatible systems developed using object oriented programming. • Mechanism to persist objects in a system • Done by mapping a complex type object to it’s corresponding relational database entity.
- 4. The Need • When you need the data access layer (DAL) to be independent of the underlying RDBMS (i.e. MS SQL, Oracle, MySQL etc.) • When you need to persist the state of your Business Objects. • Easily and quickly reflect the change in your Database Schem.
- 5. Benefits • Reduces the coding time by at least 60%. • Brings in consistency in the code so easy to handover and quick to learn. • Popular ORM tools are built on standards (e.g. code templates, Microsoft Enterprise Block etc.) which ensure code stability. • Easy binding of data with UI controls • Easy CRUD operations
- 6. Benefits • Abstraction of concepts like cache management and concurrency. • Transaction management can be easily implemented. • Data loading can be optimized. (e.g. Paging) • Help quickly build nTier applications • Units Tests and Web Services can be built automatically by a click of a button.
- 7. Popular ORM Tools • Java ▫ Cayenne, Apache ▫ Hibernate ▫ JDO ▫ DataNucleus ▫ QuickDB • MonoTouch/iOS ▫ Database Objects
- 8. Popular ORM Tools • .Net ▫ Codegen (free iNVERTEDi product) ▫ Nhibernate ▫ nTiers with Codesmith ▫ OpenAccess Telerik ▫ Entity Spaces • PHP ▫ CakePHP ▫ Qcodo
- 9. Alternatives • Object Oriented Database Management Systems (OODBMS) – DBMS in which information is represented in the form of objects used in OOP.
- 11. References • OODBMS - http://en.wikipedia.org/wiki/Object_database • ORM - https://en.wikipedia.org/wiki/Object- relational_mapping • List of ORM - http://en.wikipedia.org/wiki/List_of_object- relational_mapping_software