Sorry if I'm late at getting you an answer.
But I hope others might find this helpful in the future as well.
If you follow the trail from the struts-example, you'll find just such an
example of what you are trying to do:
--
struts-config.xml
--
action-mappings
!-- Edit user registration --
actionpath=/editRegistration
type=org.apache.struts.webapp.example.EditRegistrationAction
attribute=registrationForm
scope=request
validate=false
forward name=success path=/registration.jsp/
/action
--
org.apache.struts.webapp.example.EditRegistrationAction
--
163 form = new RegistrationForm();
164if (request.equals(mapping.getScope()))
165request.setAttribute(mapping.getAttribute(), form);
166else
167session.setAttribute(mapping.getAttribute(), form);
/*
*Notice line 165 and line 167, the mapping.getAttribute is getting
registrationForm from above in the struts-config.xml and storing the form
in the request by that name.
* Now assuming that all goes well (the user filled in the form correctly),
then we go to our jsp.
*/
201 }
202 return (mapping.findForward(success));
203
--
registration.jsp
--
// Here the current bean instance is set into the pageContext by the name
subscription
143logic:iterate id=subscription name=user
property=subscriptions
144 tr
/* Then, down here we try to create our link tag, html:link works fine for
most
* cases, however, we need have a special case.
* Personally, I use a custom tag every time I need to pass an id to another
action
* This works great for me because most of my detail records are unique by
their id and not
* by some compound key
* Basically, it appends id=n where n is the id of the database record
* that I am using/changing
*/
158 app:linkSubscription page=/editSubscription.do?action=Delete
159bean:message key=registration.deleteSubscription/
160 /app:linkSubscription
/* app is defined as a custom tld. linkSubscription is of type
* org.apache.struts.webapp.example.LinkSubscriptionTag
*/
--
org.apache.struts.webapp.example.LinkSubscriptionTag
--
173 Subscription subscription = null;
174 try {
175 subscription = (Subscription) pageContext.findAttribute(name);
176} catch (ClassCastException e) {
177 subscription = null;
178 }
/*
* Notice here that we attempt to get the form from the pageContext.
* the variable called name is set to a default value of subscription
* in this class. You can have given it any name you like
* by changing it in the logic:iterate or if you are *not* within an
iteration,
* by adding name=myName to the app:linkSubscription tag in
registration.jsp
*
* I hope that this provides some insight into writing your own custom
(struts) tags.
* They are really quite flexible and powerful.
*
* As you build your application, try to think ahead and consider every
possible use
* of a new tag, that will provide for better reuse and it will make it more
maintainable
* for the next guy (or gal).
*
*/
-Original Message-
From: Bryan P. Glennon [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 22, 2002 10:19 AM
To: Struts Users Mailing List
Subject: RE: Accessing form bean from inside a custom tag, take 2
Christian -
Those were the first two things I tried. In each case, I get a null
returned from getAttribute. I even tried
pageContext.findAttribute(beanName) and it also returned null. I am
pretty sure I have things configured correctly:
In struts-config.xml I define a form bean named fileXferBean. In the
action mapping that will lead to the page with the custom tag, I specify
fileXferBean for the name attribute. I see the bean get instantiated,
but it is just not there when I try to get it from the doStartTag
function (using ...getAttribute(fileXferBean)).
I know I should be able to do this - what am I missing?
Thanks again,
Bryan
--
Bryan Glennon (mailto:[EMAIL PROTECTED])
BPG Consulting, Inc. (http://www.bpgc.com)
Tech Question? (mailto:[EMAIL PROTECTED])
-Original Message-
From: Christian Bouessay [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 22, 2002 8:53 AM
To: Struts Users Mailing List
Subject: Re: Accessing form bean from inside a custom tag, take 2
Form-bean is stored in request/session.
And in a custom tag, you can access the property pageContext.
Why not using a code like :
MyFormBean form = (MyFormBean)pageContext.getAttribute(myFormBeanName,
PageContext.SESSION_SCOPE);
or
MyFormBean form = (MyFormBean)pageContext.getAttribute(myFormBeanName,
PageContext.REQUEST_SCOPE);
Don't know
