Re: A little help please

Tue, 02 Jan 2007 16:24:09 -0800

The component context is not used to retrieve attributes for a given definition - it is used to define and retrieve information about the currently executing environment.
If you need to MODIFY a definition you can try to utilize the MutableTilesContainer interface. 


Perhaps what you're asking for is not supported. . .what is the use 
case?  What specifically are you trying to accomplish by accessing the 
definition's attribute?



David

Stone, Sam wrote:

Still having trouble grabbing an attribute from a tiles definition. I
was doing this OK with Sep 06 code like so:

String sTilesDefName = (String) request.getAttribute("tile_name");
TilesContext tilesContext = new
  ServletTilesContext(session.getServletContext(), request, response);

ComponentDefinition componentDefinition =
  TilesUtil.getDefinition(sTilesDefName, tilesContext);

String sMyAtribute = (String)
 componentDefinition.getAttribute("myAttribute");


String sTilesDefName = (String)   
  request.getAttribute(RovingNavServlet.ATTR_ACTIVEPAGE);



David DeWolfe suggested I try the following:


TilesContainer container = TilesAccess.getContainer(context);
ComponentContext ctx = container.getComponentContext(req, res);
ComponentAttribute attr = ctx.getAttribute(name);


I did this but I find that attr is always null. Containter and ctx
appear to be valid objects.

So I modified my code a bit including checking to see if the container
was really recognizing my definition (isValidDefinition). It is. If I
give the name of any existing definition then it returns true. If I give
it a name not in my tiles-defs then it returns false.

Ctx.getAttributeNames is coming back with no attributes (i.e. my while
(it.hasNext()) loop never executes). So I'm still stuck.

Following is my current code:

try
{

TilesContainer container = 
  TilesAccess.getContainer(session.getServletContext());


String sTilesDefName = (String) request.getAttribute("tile_name");
if (container.isValidDefinition(request, response, sTilesDefName))
        System.out.println("valid definition");
else
        System.out.println("invalid definition");

ComponentContext ctx = container.getComponentContext(pageContext);
System.out.println("->ctx=" + ctx);

Iterator it = ctx.getAttributeNames();
int i=0;
while (it.hasNext())
        System.out.println("->" + i++);
}
catch (Exception e)
{
        System.out.println(e);
}


 
Sam

------------------------------------------------

-----Original Message-----

From: Stone, Sam [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, January 02, 2007 1:28 PM

To: Struts Developers List
Subject: RE: How to access componentDefinition?

In your example:

TilesContainer container = TilesAccess.getContainer(context);
ComponentContext ctx = container.getComponentContext(req, res);
ComponentAttribute attr = ctx.getAttribute(name);

ctx comes back with no attributes (therefore attr results in null).

I think I want to call getContainer with pageContext. How do I get the
pageContext?

To recap what I WAS doing with the old API - I was inspecting a tiles
definition and searching for a specific attribute. I'm doing this BEFORE
dispatching to the tiles servlet.

Sam

-----Original Message-----
From: David H. DeWolf [mailto:[EMAIL PROTECTED] On Behalf Of David H.
DeWolf
Sent: Tuesday, January 02, 2007 10:36 AM
To: Struts Developers List
Subject: Re: How to access componentDefinition?


potentially . . .it depends on your environment.  My guess is that from 
your example the answer is yes.


David

Stone, Sam wrote:

TilesContainer container = TilesAccess.getContainer(context);

Is "context" the servletContext?

-----Original Message-----
From: David H. DeWolf [mailto:[EMAIL PROTECTED] On Behalf Of David H.
DeWolf
Sent: Tuesday, January 02, 2007 10:30 AM
To: Struts Developers List
Subject: Re: How to access componentDefinition?

Hi Sam:

Everything is now done through the container.

Try something like this:

TilesContainer container = TilesAccess.getContainer(context);
ComponentContext ctx = container.getComponentContext(req, res);
ComponentAttribute attr = ctx.getAttribute(name);


David

Stone, Sam wrote:

Using the API from Sep 2006 I was able to access externally an

attribute

from a tiles definition as follows:

String sTilesDefName = (String) request.getAttribute("tile_name");
TilesContext tilesContext = new
ServletTilesContext(session.getServletContext(), request, response);

ComponentDefinition componentDefinition =
TilesUtil.getDefinition(sTilesDefName, tilesContext);

String sMyAtribute = (String)
componentDefinition.getAttribute("myAttribute");

I can't quite figure out how to do this using the current Tiles 2

API.

Sam



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