part-1 hibernate

All about hibernate tutorial,presentation,assignment from cdac original post

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It includes
1)What is persistence?
The paradigm mismatch
Persistence layers and alternatives
Object/relational mapping

2)what is Paradigm Mismatch definition..?
Problems caused when objects need to be stored in relational tables.
Granularity
Subtypes
Identity
Associations
Graph Navigation


3)Problem of Granularity
Objects can have various kinds of granularity (structure ??) to its data.
Poor support for used defined types (UDT) in SQL.
No implementation is portable.
Forces developers to use less flexible representations on the object model

4)hibernate Problem of Subtypes
Java objects implements inheritance (super & sub classes).
Each sub or super class will define different data & completely different functionality.
An object can be associated with objects of different classes, but of same type (polymorphism).
SQL provides no support for inheritance or polymorphism

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