How to find out top 10 records from the R/3 using Java code (WD Program)

Hi Experts,
I have used Java Web Dynpro program to fetch records from the backend. Following code helps me and fetches record. As per the customer reqirement, we have to fetch only top 10 records (Actual Cost) from the backend. So I have to modify the Java code. How I can do so? Please help.
 wdContext.nodeGraphData().invalidate();
 IPublicCostcnt.IGraphDataElement categoryElement;
 for (int i = 0; i < wdContext.nodeItab_Final1().size(); i++) {
 categoryElement = wdContext.createGraphDataElement();
 categoryElement.setCostElement(""+ wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getDescription());
 categoryElement.setActualCost(wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getActual_Cost().toString());
 categoryElement.setPlannedCost(wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getPlan_Cost().toString());
 wdContext.nodeGraphData().addElement(categoryElement);
Regards,
Gary

Dear SDN Users,
This is how I resolved the issue.
1) Requested ABAPer to provide me sorted data. The data has been sorted in descending order of actual_cost.
2) After that I used following code. This resolved the issue.
 if (wdContext.nodeItab_Final1().size()>10){
 IPublicCostcnt.IGraphDataElement categoryElement;
 for (int i = 0; i < 10; i++) {
 categoryElement = wdContext.createGraphDataElement();
 categoryElement.setCostElement(""+ wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getDescription());
 categoryElement.setActualCost(wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getActual_Cost().toString());
 categoryElement.setPlannedCost(wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getPlan_Cost().toString());
 wdContext.nodeGraphData().addElement(categoryElement);
 if (wdContext.nodeItab_Final1().size()<=10){
 if (wdContext.nodeItab_Final1().size()>0){
 IPublicCostcnt.IGraphDataElement categoryElement;
 for (int i = 0; i < wdContext.nodeItab_Final1().size(); i++) {
 categoryElement = wdContext.createGraphDataElement();
 categoryElement.setCostElement(""+ wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getDescription());
 categoryElement.setActualCost(wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getActual_Cost().toString());
 categoryElement.setPlannedCost(wdContext.nodeItab_Final1().getItab_Final1ElementAt(i).getPlan_Cost().toString());
 wdContext.nodeGraphData().addElement(categoryElement);
Regards,
Gary

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