How to map the method action return value directly into screen using variables?

Question

Hi,
My JDev version is 11.1.1.6.3.
I have a 'MethodAction' defined in PageDef file, that goes to model layer and return String value. As this needs to be executed during initializing of pageDef, I have also added an 'InvokeAction' for that.
<executables>
           <invokeAction id="invokeSayHelloId" Refresh="ifNeeded"
                                Binds="sayHello"/>
           <variableIterator id="variables">
                <variable Name="Name" Type="java.lang.String"/>
           </variableIterator>
</executables>
<bindings>
          <methodAction id="sayHello" InstanceName="HrAMDataControl.dataProvider"
                                 DataControl="HrAMDataControl" RequiresUpdateModel="true"
                                 Action="invokeMethod" MethodName="sayHello"
                                 IsViewObjectMethod="false"
                                 ReturnName="data.HrAMDataControl.methodResults.sayHello_HrAMDataControl_dataProvider_sayHello_result">
                                    <NamedData NDName="pName" NDValue="Michael John" NDType="java.lang.String"/>
         </methodAction>
</bindings?
Requirement:
I want to map the return value of this method action directly into screen by making use of PageDef variables.
Question:
I. I need to know how to map this return value direcly as exprssion against PageDef variable.
2. If Question 1 is achievable, assuming the method action returls List instead of String (I know well it returns 2 items), can I map the 1st Item against Variable 1 and 2nd Item against Variable 2 directly?
Thanks in Advance.
Ragu

Answer 1

Thanks Frank, but If I directly map the MethodAction's result to UI, there are chances where it might get executed whenever I refresh the UIComponent (UIComponent to which the methodAction result is mapped. Isn't so??). Instead, If I invoke the MethodAction using InvokeAction, I can get the control on when it should get invoked (using RefreshCondition). If I assign the variable to UIComponent (Assume I've mapped the method action result to variable using expression), refreshing of UIComponent will not cause any performance issue I feel.
Correct me If I am wrong.