valueProcess.js

import("system.result");
import("system.neon");
import("system.vars");

if(vars.get("$sys.operatingstate") == neon.OPERATINGSTATE_NEW)
{
    if(vars.exists("$param.ProductId_param") && vars.get("$param.ProductId_param") != null && vars.get("$param.ProductId_param") != "")
        result.string(vars.getString("$param.ProductId_param"));    
}