Model

Spring (version-compliant with current SourceLabs-licensed SASH Stack)

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, JCo for SAP R/3 integration

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, Hibernate for data persistence and ORM (version-compliant with current SourceLabs-licensed SASH Stack)

• For SAP applications, proxy classes populated by SAP R/3 functions must be generated with the sap2java tool and not modified by hand.
• For database applications, dao classes are responsible for retrieving model objects from the database using hibernate.
• modelclasses are not specific to any front end or back end, but model the business itself. I.e. they do not represent the data for a page, nor do they contain proxy objects or make reference to the back end in any way.
• service classes are responsible for converting proxy objects to model objects, and also for providing any business logic not already provided by the back end.
• There must only be one service per application (not including mock services).
• Collections must be documented to state what objects they contain and what properties those objects contain.
  

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