Question regarding the logic:iterate tag

[kay lin]

Hi:
I just started learning STRUTS and coding application using STRUTS not long ago, so if my quesiton seems trivial to you, please bear with me

Here is a couple of questions regarding the <logic:iterate> tags,

I know that <logic:iterate> must have a required attribute: - id and here is the definition of "id" directly quoted from the apache web site

"id - The name of a page scope JSP bean that will contain the current element of the collection on each iteration"

can somebody tell me exactly what a "page scope JSP bean" is? and also, what does it mean by "page scope"?

suppose i have the following

 
 ArrayList inquiryResults = new ArrayList();
    inquiryResults.add(new InquiryResultDisplayBean("005001", "00656992",
        "04/01/02", "104.15", "AD", "Name1", "Name2", "5"));
    inquiryResults.add(new InquiryResultDisplayBean("005001", "00729912",
        "04/02/22", "55.20", "GB", "Name2", "Name2", "7"));
        
        
        request.setAttribute("inquiryResults", inquiryResults);

and in my JSP page, i have my STRUTS tags laid out as the following

<logic:iterate id='transaction' collection='<%= request.getAttribute("inquiryResults") %>'>
    <bean write: name='transaction' property='PRKey'/>
</logic:iterate>

now in this case, is "transaction" the name of a JavaBean class? or it is more like an iterator to "inquiryResults" (an array List)
also <bean write: name='transaction' property='PRKey'/>, the "name" attribute of <bean:write> specifies the attribute name of the bean whose property is accessed to retrieve the value specified by property (if specified). Then does that mean in this case 'transaction' also represents the JavaBean class who has a field called "PRKey" and a getter and setter methods called getPRKey() and setPRKey()?

please let me know. By the way, I find the Struts reference on Apache web site are comprehensive, but they tend to be very confusing sometimes. I wish they could explain everything in plain English and provides with some examples, does anyone know anywhere i may find such resources that provide complete Struts Reference, with lots of examples and they are easy to understand? please let me konw


I know this is a long post, So I TRULY appreciate any help

Many THANKS

[Jeanne Boyarsky]

When they say "page scope", they just mean that the bean needs to be accessible on the current page. It can be in the request or session even though it isn't clearly stated.

In your example, transaction is the name of a variable that will hold the current value in the loop. It's just like the temporary value i in a for loop. You could also write it as

<logic:iterate id='transaction' name='inquiryResults' scope='request'>

and do away with the scriptlet. Your interpretation of the bean write tag is correct.