Hibernate - an introduction

1. Hibernate
an introduction
José Luis Muñoz
Jun 12, 2012

2. Contents
1
1. Problem, Software history
2. Advantages ORM (Object Relation Mapping)
3. How it works (high level vision)
4. Relation: Eclipse – DataBase – Hibernate
5. Configuration file cfg.xml
6. Mapping files
7. Object States
8. Example

3. Problem, Software history
2
1. SQL sentences into code
Business
Classes Data Base
2. DAO Architecture
Business
Classes
DAO
SQL
Data Base

4. Problem, Software history
3
3. Mapping problem
Business
Classes Data Base
Public class Employee {
private String name;
}
TABLE Employee (
VARCHAR2(50) NAME,
)

5. Advantages ORM (Object Relation Mapping)
4
Advantages:
- Complete database abstraction
- IDE mapping generated for objects-tables relation
- Automatic state change
- Easy configurable through xml
- Implements JPA (Java Persistence Api) standar

6. How it works (high level)
5

7. How it works (high level more detail)
6

8. Relation: Eclipse – DataBase – Hibernate
7
Eclipse
Hibernate
Data Base
Data base
connection
User Library Configuration file

9. Configuration file cfg.xml
8
Hibernate dialect

10. Mapping files
9
http://www.slideshare.net/rahuldausa/hibernate-for-beginners

11. Object States
10

12. Example (state change)
11
Methods: save(Object.class )

13. The End
12
joseluis@trustparency.es