Reading viewScope variable in ViewImpl class method

Question

Hi,
suppose i'd like to get viewScope.deptno in my function which is declared in ViewImpl class
public void proc(String deptno,String amount){
setp_deptno(deptno==null?"%":deptno );
this.setNamedWhereClauseParam("p_deptno", deptno);
this.executeQuery();
System.out.println("viewScope.deptno="...?);
how can i reach it in my function?

Answer 1

do you mean placing the logics from VOImpl to client interface class?yes, then you can see the method exposed in the data control under the ViewObject node. then you can execute the method in your bean method like below
    public String executeMyVOMethod {
        BindingContainer bindings = getBindings();
        OperationBinding operationBinding = bindings.getOperationBinding("proc");
        operationBinding.getParamsMap().put("deptno", PassAnyDeptNo);//you can get it from view scop variable
        operationBinding.getParamsMap().put("amount", passAnyAmmountvalue);  //you can get it from view scop variable
        Object result = operationBinding.execute();
        if (!operationBinding.getErrors().isEmpty()) {
            return null;
        return null;
    }could you clarify why it is a bad practice to store logics in VOImpl?
is that because i can't reference ViewScope from there?
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accessing a memory scope variable in your model layer (if its applicable) is a bad practice because you violate MVC pattern. This is not the best approach even if you can do it.
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(this approach is based on Shay's video tutorial "Passing Parameters to ADF Application through the URL")
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it is different, it is not your use case