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From "Gallagher, Jim \(UK Europe Middle East & Group Functions, Technology Services\)" <Jim.Gallag...@rbs.co.uk>
Subject RE: Issue with retrieving Tiles definitions in code
Date Tue, 09 Mar 2010 11:25:34 GMT
Thanks for your reply Antonio.

This behaviour was available in Struts-Tiles, has it been removed from Tiles 2.0?

The rules definition is, as you say, not designed to be rendered. It's purpose is to hold
a list of security roles  - these roles are processed programmatically and this decides whether
the user sees that menu item (or entire menu), based on their assigned role.

This functionality is used in our (very extensive) Branding & Security framework for Struts-Tiles,
and I'd be keen to maintain it with only minimal change if possible. However, if it's not
possible to recreate this in Tiles 2.0, I'd appreciate any suggestions as to how to achieve
the objective.



Jim Gallagher,
Core Web Security,
Group Technology Solutions,
Royal Bank of Scotland,
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-----Original Message-----
From: Antonio Petrelli [mailto:antonio.petrelli@gmail.com] 
Sent: 09 March 2010 11:11
To: users@tiles.apache.org
Subject: Re: Issue with retrieving Tiles definitions in code

2010/3/9 Gallagher, Jim (UK Europe Middle East & Group Functions, Technology Services)
> A rules definition is defined as follows:
>        <definition name="rule.menu.messaging.view">
>                <put-attribute name="type" value="one_role" />
>                <put-list-attribute name="roles">
>                        <add-attribute value="ROLE1" />
>                        <add-attribute value="ROLE2" />
>                        <add-attribute value="ROLE3" />
>                </put-list-attribute>
>        </definition>
> Ultimately I want to retrieve the rules definition, retrieve the roles specified and
process them according to our own security standards here.
> Where it's falling down is that in the TilesMenuRuleControlPreparer class, I'm trying
to retrieve the rules definition as follows:
>                        DefinitionManager definitionManager = new 
> DefinitionManager(
> "org.apache.tiles.impl.BasicTilesContainer.DEFINITIONS_CONFIG");
>                        Definition def = 
> definitionManager.getDefinition(name,
>                                        tilesRequestContext);
> This is failing with a NullPointerException - on debugging, I see that the Factory instance
within the DefinitionManager is null.

This is normal, you are not using the correct tool.
DefinitionManager is a tool used by Tiles to define newly-created definitions, not to retrieve
already stored ones.
However, there is a problem: you cannot get a definition using the Tiles API. You can only
render it, and use the attributes in the template page. So I think we need to find a workaround.
The definition has no meaning without a template (its own, or inherited from an extended definition).
How do you want to use these "rules"?

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