public class xxxxContributionItem extends CompoundContributionItem {
	
 @Override
 protected IContributionItem[] getContributionItems() {
   //define an array
   CommandContributionItemParameter param = new CommandContributionItemParameter(PlatformUI.getWorkbench().getActiveWorkbenchWindow(), XYCommand.ID + ".menuEntry", XYCommand.ID, CommandContributionItem.STYLE_PUSH);
   param.label = "XY";
			
   commandParamametersMap = new HashMap<String, Object>();
			
   commandParamametersMap.put("x",  x);
		
   param.parameters = commandParamametersMap;
   
   //Add contribution item to list
   CommandContributionItem cItem = new CommandContributionItem(param)  
 }
}