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.
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.
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