emerson sanchez wrote:
>
> Hi everyone,
>
> I just wanted to know if display tag loads the whole collection that
> you passed to it? Say you have a collection that has 1000 objects and
> you set the page size to 10. Does it load only 10 objects to the
> session? Or does it load the whole collection but displayed only 10?
>
DisplayTag doesn't load any data. YOU do that and pass the collection to
DisplayTag to display.
>
> Here's a code to explain it further.
>
> Java code:
> List<User> userList = new ArrayList<User>();
> for(int x:0;x<1000;x++){
> User user = new User();
> userList.add(user);
> }
>
And there you are. YOU've loaded 1000 items into the List.
>
> JSP code:
> <display:table name="userList" pagesize="10">
> <display:column title="Id" property="id"/>
> <display:column title="Name" property="name"/>
> </display:table>
>
And here you've told DisplayTag "here's the list, display just 10 at a
time".
>
> If display tag loads the whole collection on the session once the page
> loads, Is there a way to just load only 10 objects on the session
> since I set the page size to just 10 and still implement a pagination?
>
There's external paging and sorting:
http://displaytag.sourceforge.net/1.2/tut_externalSortAndPage.html
which allows you to load the items a page at a time. There have been
lots of questions asked on this list about this feature so a search
through the archives might be useful too.
Ed!
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