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 |
> > |
> >
> >
> >
> >
>
>
