1. Utilized code generation to save our efforts in SAP Integration Albert Guo [email_address]

3. Scenario

4. Scenario

5. SAP Implementation

6. SAP Implementation But including the connectivity and data access code within these components introduces a tight coupling between the components and the data source implementation. Such code dependencies in components make it difficult and tedious to do modification if requirement change.

7. Data Access Object Pattern

9. DAO Structure © 2006 PTC The BusinessObject represents the data client. It is the object that requires access to the data source to obtain and store data. The DataAccessObject is the primary object of this pattern. The DataAccessObject abstracts the underlying data access implementation for the BusinessObject to enable transparent access to the data source This represents a Transfer Object used as a data carrier This represents a data source implementation. A data source could be a database such as an RDBMS, OODBMS, XML repository, flat file system, and so forth. A data source can also be another system (legacy/mainframe), service (B2B service or credit card bureau), or some kind of repository (LDAP).

10. Participants and Responsibilities © 2006 PTC Create Read Update, Delete

14. Implementation Steps Squirrel SQL Client and DAO4J can generate these codes, so we does not need to do from the scratch. We can take it as black box. We just need to focus on workflow design and author business objects. We don’t need to know how to do CRUD.

15. Squirrel SQL Client and DAO4J

17. Demo

18. Demo Select specific table. Right click, then select Generate DAO . 1

19. Demo Define code gen to where Define package name for each class Refer to database specific properties file in dao4jonf 2

20. Demo

21. Class Diagram DAO Interface DTO Class The DTO Class which contains only the PK fields and can be used as the key of HashMap This table has more than 80-column, I’ll not show all attributes in class diagram DAO Impl DTO Class

22. Class Diagram We does not need to know the detail method operation, just call create method if we need to insert data into ERP interface table.

23. Source code snippet . . We just need to focus on how to retrieve all the necessary attributes, and set values to DTO Provide DTO and connection to create method. Then, everything is done.

24. ATTENTATION – Poor Exception Handling We need to add catch clause before finally clause

25. ATTENTATION – Poor Exception Handling

26. Summary

28. Summary Code Generation We can focus on workflow design, and retrieve required value and call DAO method.