Jason,

Thanks for that, I have to get my head around the implications. 

I am new to open source software projects and I am hooked, it is helping to
expand exponentially my knowledge of java and oo design.

Thanks to all who contribute to these lists, I hope to get to a level where
I feel I can contribute.

        Dave 

> -----Original Message-----
> From: Jason van Zyl [mailto:[EMAIL PROTECTED]]
> Sent: 10 September 2001 16:01
> To: [EMAIL PROTECTED]
> Subject: Re: TemplateContext
> 
> 
> On 9/10/01 10:54 AM, "David Meaker" <[EMAIL PROTECTED]> wrote:
> 
> > Hi,
> > 
> > I have had a bit of time recently to experiment with 
> Turbine 3.0.  It is
> > going to be very difficult to go back to developing in 2.1.
> > 
> > I came across something which I don't understand and was 
> wondering if I
> > could trouble 3.0 developers.
> > 
> > I came to test the TemplateHtmlEmail class and while trying 
> to compile I
> > found that the interfaces org.apache.turbine.TemplateContext and
> > org.apache.fulcrum.template.TemplateContext are 
> incompatible; both define
> > put(java.lang.String,java.lang.Object), but with different 
> return type.
> > 
> > In org.apache.turbine.TemplateContext
> >     public java.lang.Object put(java.lang.String key, 
> java.lang.Object
> > value)
> > 
> > In org.apache.fulcrum.template.TemplateContext
> >   public void put(java.lang.String key, java.lang.Object value)
> > 
> > 
> > Is this correct or is it an error?
> 
> It is correct.
> 
> For Turbine 3.0 we hope to arrive at an API which consists of a set of
> interfaces that are wholly decoupled from any tools which 
> turbine might use.
> 
> We have had a few discussions about this, in particular why 
> some of the
> turbine interfaces don't extend Fulcrum interfaces or Torque 
> interfaces for
> example. It basically boils down to not tying the development 
> cycles of
> different projects together. Right now Turbine, Fulcrum and 
> Torque are still
> more or less one project even though they exist in different 
> repositories.
> But their development cycles may change entirely at some 
> point. I'd like to
> try and keep any changes in base tools like Fulcrum from 
> affecting Turbine
> application code. Daniel Rall asked for my reasons and I 
> responded so I will
> try to dig that up and put it in an xdoc.
> 
> The template interfaces and classes are particularly 
> confusing because they
> are adaptered in two places. In Fulcrum itself the 
> TemplateService uses a
> TemplateContext and each of the Template engines supported 
> has an adapter to
> make its particular context class appear as a TemplateContext that the
> TemplateService understands and in Turbine we have our own 
> TemplateContext
> and it is adapted so that the Fulcrum template service can 
> deal with it.
> 
> This appears redundant because the projects have just been 
> severed so things
> definitely appear to be identical in places and they are. But 
> this will not
> always be the case. I expect Fulcrum, Turbine and Torque to 
> diverge and I
> hope to protect Turbine from this by defining an independent set of
> interfaces that Turbine application programmers can use.
>  
> > 
> > kind regards
> > 
> >   Dave Meaker
> > 
> > 
> > 
> 
> -- 
> 
> jvz.
> 
> Jason van Zyl
> 
> http://tambora.zenplex.org
> http://jakarta.apache.org/turbine
> http://jakarta.apache.org/velocity
> http://jakarta.apache.org/alexandria
> http://jakarta.apache.org/commons
> 
> 
> 
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