George are you looking from preventing the user from going back or are you looking for preventing caching?
-----Original Message----- From: Georg Filios [mailto:[EMAIL PROTECTED] Sent: Thursday, July 22, 2004 3:06 PM To: [EMAIL PROTECTED] Subject: Error: html:multibox, backbutton, BeanPopulate Exception (IndexOutOfBoundsException) Hi, I am having a unnices error, which I can't solve. Even I am having found any hints in the archives, making me very nervous, that I totally messed up some concepts. Here is my Problem: I am using a html:multibox to select some entries (the number of the entries, is dynamic) i.e 5 different. When I submit the form, everything goes fine, and after validation in my action form, I can remove in my model all entries, not checked. The model with the pruned entries is stored in my session again (i.e. now I am having 3 entries) Now the problem occurs. If the user hits the back button (which he is isnt supposed to), he sees the form with all entries ( 5 entries), which makes sense, since the browser recalls the cached page. Now if the user select again a checkbox and submits, i get the an IndexOutOfBoundsException (see below). What makes me really nervous is the fact, that it happens all before any of my Actions or Forms are getting involed (except my ActionForm.reset method) So I cant Intervent the double submit (i.e. by using tokens). Any Ideas how to prevent this siutation, or what might be the real cause (since I dont fully understand what happens) regards, Georg here is my JSP-CODE: <logic:iterate id="category" name="GenerateCategoryForm" property="Categories" indexId="idx"> <html:multibox property="checkedCategories"><%=idx%><br> </logic:iterate> here is the Exception: exception javax.servlet.ServletException: BeanUtils.populate org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1254) org.apache.struts.action.RequestProcessor.processPopulate(RequestProcess or.java:821) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 254) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) de.creativetank.gamble.app.websecure.LoggedInFilter.doFilter(Unknown Source) root cause java.lang.IndexOutOfBoundsException: Index: 2, Size: 1 java.util.ArrayList.RangeCheck(ArrayList.java:507) java.util.ArrayList.get(ArrayList.java:324) org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUt ils.java:503) org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUt ils.java:410) org.apache.commons.beanutils.PropertyUtils.getNestedProperty(PropertyUti ls.java:749) org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.jav a:780) org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:793) org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:726) org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252) org.apache.struts.action.RequestProcessor.processPopulate(RequestProcess or.java:821) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 254) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) de.creativetank.gamble.app.websecure.LoggedInFilter.doFilter(Unknown Source) --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
