I was looking for a solution where I can have a textual grammar for a DSL in
order to specify filters on objects. I didn't really search the net because I
know a cute little DSL for that already. It is called smalltalk, you might have
heard of it.
So what I do is putting the filter spec into the image via an http interface,
materialize the filter in image and store it in a database to have them survive
image restart. A filter spec could look like this
[ :value | ( self sectionLabelOf: value ) = 'device' ]
I want to know if there is any trouble to expect if I'm using plain block
syntax for that task. As the blocks are injected using an http interface there
is no environment/context problem. I would have some helper class as a facade
to ease the filtering let's call it
FilterHelper (would have a class side method #sectionLabelOf:)
So getting the block code via HTTP I could do
block := Smalltalk compiler
evaluate: request contents
for: FilterHelper
logged: false
And I would serialize it into a database as a string again doing
self store: block sourceNode formattedCode
Are there any possible drawbacks using it this way?
thanks,
Norbert
