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Errata on HF question?

 
alzamabar
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Hi guys (I'm using the term 'guys' not in the gender way . I've already checked on the errata for this question but I couldn't find anything. Here's the question (which you can find on page 423 of HFJSP).

Given the following class:


Which will cause errors, assuming that an attribute named "mybean" of type MyBean can be found?

a) ${mybean.name}
b) ${mybean["name"]}
c) ${mybean.objects.a}
d) ${mybean["params"].a}
e) ${mybean.params["a"]}
f) ${mybean["objects"].a}

The book give as answers C and F, because objects in not a Map and a lookup will not be performed. However, I'm trying with Tomcat 5.4 and in any of the above cases I don't get an exception. However, if I add something like ${mybean["trallalla"]}, I get the following exception:

[list-start]
javax.servlet.ServletException: Unable to find a value for "trallala" in object of class "org.jemos.certs.vo.MyBean" using operator "[]"
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:845)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:778)
org.apache.jsp.elFunction_jsp._jspService(org.apache.jsp.elFunction_jsp:74)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:325)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


[list-end]

This is the java class that I wrote:



and this is the JSP page:


Now, is it Tomcat too smart, so it doesn't produce an error even when it should, or is there an errata for this question?

Thanks for any help,
[ January 23, 2005: Message edited by: Marco Tedone ]
 
alzamabar
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I found that the problem was due to Tomcat 5.5 and not to the HF. With Tomcat 5.0 the container throws an exception.

Marco
 
It is sorta covered in the JavaRanch Style Guide.
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