In the Java business object proxy class, for each member function that interfaces with a business object method (BAPI), there is a corresponding parameter container class that contains the parameters used for calling that BAPI method. For example, jbo ProfitCenter.getlist() has a class jb oProfitCenterGetlistParams that contains all the defined parameters for the method ProfitCenter.Getlist. Using the member functions in this class, the application program sets the parameter values in preparation for a method call, and retreives the returned parameter values after the method call.

See an example of a parameter container class for the BAPI method ProfitCenter.Getlist in the Java BAPI HTML Reference (in Com.sap.bapi.profitcenter.jboprofitcentergetlistparams.html).

The parameter container class contains 3 types of parameters: simple, structure and table parameters.

• Simple parameters: each simple parameter has a setter and getter function for setting and getting the value of the simple parameter. The setter function name has the format s et<parameter_name>(...) , and the getter function name has the format get<parameter_name>() . parameter_name itself has the format that begins with an upper-case character and carries the rest of the characters in lower-case. Each simple parameter proxy is of a Java native type that corresponds to the ABAP data type of the simple parameter itself. For mapping of ABAP data types to Java native data types and vice versa, please refer to ABAP to Native Data Type Mapping.
• Structure parameters: The getter function of the structure parameter returns a structure parameter proxy object. Likewise, the setter function takes, as argument, a structure parameter proxy object, and stores that into the parameter container object. The naming convention for the setter and getter functions of structure parameters are identical to that for the simple parameters. Please refere to The Structure Parameter Classes.
• Table parameters: The getter function of the table parameter returns a table parameter proxy object. Likewise, the setter function takes, as argument, a table parameter proxy object, and stores that into the parameter container object. The application program then uses the member functions offered by the table parameter proxy object to access individual table row proxy objects, which in turn, offers setter and getter functions for the table fields. The naming convention for the setter and getter functions of table parameters are identical to that for the simple parameters. Please refere to The Table Parameter Classes and The Table Row Classes.