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Posted to users@tapestry.apache.org by Neil Clayton <ne...@cloudnine.net.nz> on 2003/06/15 15:01:06 UTC
Table model "problem"
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Well, it might not be problem. More likely, I just don't know the way around
it :-)
I'm building a simply link farm. Why? Cos I Can :-) (I did the same thing with
Millstone a while back, so I'm using this as a comparison - since it's going
to have exactly the same functionality)
A user in the farm (moo) has some number of link containers. Each container
holds zero or more links. Simple so far.
I thought that it would therefore be possible to do the followin:
<foreach jwcid="usersContainers">
<table width="85%" border="0">
<tr>
<th bgcolor="#eeeee" colspan="3">
<font size="+2"><span jwcid="@InsertText"
value="ognl:components.usersContainers.value.description"/></font>
</th>
</tr>
<span jwcid="tableView">
<tr jwcid="tableRows">
<td jwcid="tableValues"/>
</tr>
</span>
</table>
</foreach>
I'm using a custom table model, which is created as follows:
Foreach linkContainers = (Foreach) getComponent("usersContainers");
LinkContainer container = (LinkContainer) linkContainers.getValue();
return new LinkContainerTableModel(container);
the idea being that I create a new model for the particular container being
iterated over. However; I'm finding that the Table attempts to use the model
in it's fireBeginRender() handler - but the model cannot be instantiated
because it is illegal for me to access the value property of the Foreach
"before rendering".
I tried using a PageRenderListener on the page itself, so that I knew when
rendering was occuring (when not, I returned the same table model, but with
an empty LinkComponent) - however the Table never re-requests the table model
- - so I never end up giving it the right data to display.
Any ideas on how to get around this?
- --
Neil Clayton
Developer
ThoughtWorks (http://www.thoughtworks.com)
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Re: Table model "problem"
Posted by Neil Clayton <ne...@cloudnine.net.nz>.
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Well, Ive got around the problem by passing in 'this' to the table model and
then having it perform lazy construction of itself...
is there any other way to do this? I guess it's not baaaad bad bad, but I
wonder if I have missed some simpler path...
Neil
On Sunday 15 Jun 2003 2:01 pm, Neil Clayton wrote:
> Well, it might not be problem. More likely, I just don't know the way
> around it :-)
>
> I'm building a simply link farm. Why? Cos I Can :-) (I did the same thing
> with Millstone a while back, so I'm using this as a comparison - since it's
> going to have exactly the same functionality)
>
> A user in the farm (moo) has some number of link containers. Each container
> holds zero or more links. Simple so far.
>
> I thought that it would therefore be possible to do the followin:
>
> <foreach jwcid="usersContainers">
> <table width="85%" border="0">
> <tr>
> <th bgcolor="#eeeee" colspan="3">
> <font size="+2"><span jwcid="@InsertText"
> value="ognl:components.usersContainers.value.description"/></font>
> </th>
> </tr>
> <span jwcid="tableView">
> <tr jwcid="tableRows">
> <td jwcid="tableValues"/>
> </tr>
> </span>
> </table>
> </foreach>
>
> I'm using a custom table model, which is created as follows:
> Foreach linkContainers = (Foreach) getComponent("usersContainers");
> LinkContainer container = (LinkContainer) linkContainers.getValue();
> return new LinkContainerTableModel(container);
>
> the idea being that I create a new model for the particular container being
> iterated over. However; I'm finding that the Table attempts to use the
> model in it's fireBeginRender() handler - but the model cannot be
> instantiated because it is illegal for me to access the value property of
> the Foreach "before rendering".
>
> I tried using a PageRenderListener on the page itself, so that I knew when
> rendering was occuring (when not, I returned the same table model, but with
> an empty LinkComponent) - however the Table never re-requests the table
> model - so I never end up giving it the right data to display.
>
> Any ideas on how to get around this?
- --
Neil Clayton
Developer
ThoughtWorks (http://www.thoughtworks.com)
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Re: Table model "problem"
Posted by Mindbridge <mi...@yahoo.com>.
Hi Neil,
I think the issue here is that you are using the table in a loop and in the
default configuration it is set up so that this would work.
The reason is that by default the component stores the table session state
in a single location -- a persistent page property and when you put it into
a loop, different table models interfere with each other (get stored in the
same place).
To resolve this, implement ITableSessionStoreManager and pass it to the
table -- it determines where to store the table session state. In your case
it is probably best to store it in sth like a map or an array in the Visit,
so that you have a different storage location for the state of each
iteration.
Once you implement that, you can deal with the other aspects of the
iteration -- create a new table model if there is nothing stored in the
visit yet, ignore the invocations if the loop hasn't started yet, etc.
Does this help?
Best regards,
-mb
----- Original Message -----
From: "Neil Clayton" <ne...@cloudnine.net.nz>
To: "Tapestry User User (Jakarta)" <ta...@jakarta.apache.org>
Sent: Sunday, June 15, 2003 4:01 PM
Subject: Table model "problem"
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Hash: SHA1
Well, it might not be problem. More likely, I just don't know the way around
it :-)
I'm building a simply link farm. Why? Cos I Can :-) (I did the same thing
with
Millstone a while back, so I'm using this as a comparison - since it's going
to have exactly the same functionality)
A user in the farm (moo) has some number of link containers. Each container
holds zero or more links. Simple so far.
I thought that it would therefore be possible to do the followin:
<foreach jwcid="usersContainers">
<table width="85%" border="0">
<tr>
<th bgcolor="#eeeee" colspan="3">
<font size="+2"><span jwcid="@InsertText"
value="ognl:components.usersContainers.value.description"/></font>
</th>
</tr>
<span jwcid="tableView">
<tr jwcid="tableRows">
<td jwcid="tableValues"/>
</tr>
</span>
</table>
</foreach>
I'm using a custom table model, which is created as follows:
Foreach linkContainers = (Foreach) getComponent("usersContainers");
LinkContainer container = (LinkContainer) linkContainers.getValue();
return new LinkContainerTableModel(container);
the idea being that I create a new model for the particular container being
iterated over. However; I'm finding that the Table attempts to use the
model
in it's fireBeginRender() handler - but the model cannot be instantiated
because it is illegal for me to access the value property of the Foreach
"before rendering".
I tried using a PageRenderListener on the page itself, so that I knew when
rendering was occuring (when not, I returned the same table model, but with
an empty LinkComponent) - however the Table never re-requests the table
model
- - so I never end up giving it the right data to display.
Any ideas on how to get around this?
- --
Neil Clayton
Developer
ThoughtWorks (http://www.thoughtworks.com)
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