Just a thought, but have you tried "java.util.Map$Entry" instead of
"java.util.Map.Entry" when you specify the type?
--
Martin Cooper
Tumbleweed Communications
----- Original Message -----
From: "Chris Wilson" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, January 09, 2001 12:00 PM
Subject: RE: Can I use a Map.Entry as a bean?
> here's a simple example of what i'm talking about. would one of your
> wizards please try this servlet and jsp page to see what i'm talking
about?
> thanks very much!
>
> i tried this on tomcat 3.2.1, jdk 1.3, win 2000
>
> ###### Begin TestServlet.java ######
>
> import javax.servlet.http.HttpServlet;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
> import javax.servlet.ServletException;
> import java.util.HashMap;
> import java.io.IOException;
>
> public class TestServlet extends HttpServlet {
> public void doGet(HttpServletRequest req, HttpServletResponse res)
> throws ServletException, IOException {
> HashMap map = new HashMap();
> map.put("test", "hope this works");
> map.put("foo", "bar");
> req.setAttribute("map", map);
> getServletContext().getRequestDispatcher("/display.jsp").forward(
> req, res);
> }
> }
>
> ###### End TestServlet.java ######
>
> ###### Start display.jsp ######
>
> <%@ taglib uri="struts-logic.tld" prefix="logic" %>
> <%@ taglib uri="struts-bean.tld" prefix="bean" %>
> <html>
> <head>
> <title>display.jsp</title>
> </head>
>
> <body>
> <logic:iterate name="map" id="entry" scope="request"
> type="java.util.Map.Entry">
> <!-- i get an IllegalAccessException when running the following two
> lines -->
> <!-- delete the following two lines to elimate the
> IllegalAccessException -->
> <bean:write name="entry" property="key" scope="page" /> ->
> <bean:write name="entry" property="value" scope="page" /><br>
> <!-- why dosen't this work? -->
> <!-- end delete -->
>
> <!-- these two lines work! they don't throw an exception -->
> <!-- they are functionally equivelent to the above two lines right? -->
> <%= ((java.util.Map.Entry)pageContext.getAttribute("entry")).getKey()
%> ->
> <%= ((java.util.Map.Entry)pageContext.getAttribute("entry")).getValue()
> %><br>
> </logic:iterate>
> </body>
> </html>
>
> ###### End display.jsp ######
>
> | chris wilson || web dev ||| [EMAIL PROTECTED] || | www.wondergeek.com
|
> |
>
> > -----Original Message-----
> > From: Chris Wilson [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, January 04, 2001 10:46 AM
> > To: [EMAIL PROTECTED]
> > Subject: RE: Can I use a Map.Entry as a bean?
> >
> >
> > yes,
> >
> > i've included both taglib defs... in fact, the tags are working great.
> > it's only the write tag that's having a problem, and only when i
> > try to get
> > a property on a Map.Entry
> >
> > <bean:write name="subjectEntry" property="value" scope="page" /> // this
> > fails with an IllegalAccessException...
> >
> > ((java.util.Map.Entry)pageContext.getAttribute("subjectEntry)).get
> > Value() //
> > this works!
> >
> > if i use my own bean in the write tag, everything is dandy. it's just
the
> > dang Map.Entry!
> >
> > | chris wilson || web dev ||| [EMAIL PROTECTED] || |
> > www.wondergeek.com |
> > |
> >
> > > -----Original Message-----
> > > From: Ted Husted [mailto:[EMAIL PROTECTED]]
> > > Sent: Thursday, January 04, 2001 10:11 AM
> > > To: Struts List
> > > Subject: Re: Can I use a Map.Entry as a bean?
> > >
> > >
> > > So, you've included the Struts bean tag library along with logic, yes?
> > >
> > > <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
> > > <%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
> > >
> > > You can get some weird and misleading error messages if you omit a
> > > taglibs you're using.
> > >
> > > The inner class shouldn't cause a problem, since the iterate tag is
> > > designed for that (an attribute or property of an attribute).
> > >
> > > For more troubleshooting, did you try setting the inner class as a
> > > standalone page attribute, to see if that works too?
> > >
> > > *********** REPLY SEPARATOR ***********
> > >
> > > On 1/4/2001 at 9:17 AM Chris Wilson wrote:
> > >
> > > hello,
> > >
> > > sorry to post this similar message again, but i'm really stumped...
> > >
> > > i've run into a problem however trying to use the iterate tag with a
> > > TreeMap
> > > and the write tag... here's a snippet of my code:
> > >
> > > <logic:iterate name="subjects" id="subjectEntry" scope="request"
> > > type="java.util.Map.Entry">
> > > // subjects is a TreeMap in the request object... no problem there
> > > // it's my understanding that when the iterate tag is used with a map,
> > > the
> > > // iterator is on the Set of Map.Entries returned by Map.entitySet(),
> > > // therefore the object exposed as subjectEntry should be a
> > > java.util.Map.Entry
> > >
> > > <bean:write name="subjectEntry" property="value" scope="page" />
> > > // this is where i get an IllegalAccessException attempting to access
> > > the
> > > //property value of subjectEntry, even though there is a getValue()
> > > method
> > > in the
> > > //api...
> > >
> > > </logic:iterate>
> > >
> > > just for fun, i replaced the write tag above with the following
> > > scriptlet
> > > which i believe is logically equivalent:
> > > <%=
> > >
((java.util.Map.Entry)pageContext.getAttribute("subjectEntry)).getValue(
> > > )
> > > %>
> > >
> > > and that works! of course, i could simply use this scriptlet and my
> > > problem
> > > would be solved, but i'd like to use only taglibs if possible and it
> > > seems
> > > to me that the <bean:write> tag should do the same thing...
> > >
> > > will <bean:write> only work on "bean-like" objects that are public?
in
> > > this
> > > case the object implementing the Map.Entry interface is an inner class
> > > in
> > > TreeMap. is that causing the problem?
> > >
> > > what am i missing? thanks for any help!
> > >
> > > cheerio,
> > > chris
> > >
> > > | chris wilson || web dev ||| [EMAIL PROTECTED] || |
> > > www.wondergeek.com |
> > > |
> > >
> > >
> > >
> > >
> >
> >
>
