Null value in Session vars and request.getParameter

Question

We're migrating our application from iPlanet.
          Under iPlanet, when we looped through a resultset and set the values to
          session variables - it worked fine, even when a resultset value was null,
          but in WebLogic, I get the following error:
          java.lang.IllegalArgumentException: key/value is null
          Is there anyway to "turn this off" so it behaves like iPlanet?
          My second question is that we have many JSP's that check to see if a
          parameter is null in javascript:
          Here's the code:
          function onLoad() {
          document.form.elements[0].focus();
          // Check to see if the user is coming from a shortcut
          var imageName = "<%=request.getParameter("imageName")%>";
          if (imageName == "null") {
          selectTop("<%=select_image%>");
          } else {
          selectTop(imageName);
          <% if (tableIndex == 2) { %>
          loadShortcutIcon(13,100);
          <% } %>
          in iPlanet, when the parameter "imageName" is not in the URL, the javascript
          variable gets set to "null" - but in WebLogic, it is set to a blank string -
          "". Is there anyway to make this return null like iPlanet?
          Thanks,
          Matt
          

Answer 1

Hi,
the URL parameter is added just for the request to the page. When you press the command button then you issue a new request that does not have a URL parameter added. To work around this, you can use a PhaseListener that stores the URL request parameter in the session for later use
Frank