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Posted to issues@commons.apache.org by "Bruno P. Kinoshita (JIRA)" <ji...@apache.org> on 2012/06/01 01:23:22 UTC
[jira] [Commented] (FUNCTOR-14) Enhancements on the Generator API
[ https://issues.apache.org/jira/browse/FUNCTOR-14?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287030#comment-13287030 ]
Bruno P. Kinoshita commented on FUNCTOR-14:
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Sure thing, I'll resync my code with the SVN and will start to work on this. Many thanks Simo!
> Enhancements on the Generator API
> ---------------------------------
>
> Key: FUNCTOR-14
> URL: https://issues.apache.org/jira/browse/FUNCTOR-14
> Project: Commons Functor
> Issue Type: Improvement
> Reporter: Bruno P. Kinoshita
> Priority: Minor
>
> Apparently, the Generator API in [functor] was created based on Python generators. However, there is room for enhancements in the current implementation.
> The Generator interface contains methods to stop its execution. However not all generators are necessarily 'stoppable'. Maybe we could move this behavior to a separate interface.
> The parameters passed to a generator (from, to, step) are the same that, in Python, can be used to create a Range. Ranges are used in many examples of Generators in Python. We could include Ranges in [functor] and utilize them in Generators. It would be good if we could include/exclude the Range boundary values, i.e. we could create a Range 0..2, and define 0 or 2, as being either inclusive or exclusive.
> Among the current generators, there is one for Integer's, and another one for Long's. We could create generators for other types too (e.g.: Char, Date, Double, Float, ...).
> Another feature usually related to Generators in Python is the yield statement. There are some API's in Java that provide a yield implementation. This is not entirely necessary, but could be convenient to include it to [functor] too, combined with Generators. Maybe in [functor] we could create a YieldProcedure. This way, the Generator would yield its values to this procedure. Just food for thought.
> This issue is quite vague, so feel free to add comments, or criticize. This way we can achieve a common consensus on a new and awesome Generator API for [functor]. No hard feelings :-)
> Cheers
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