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https://issues.apache.org/jira/browse/JEXL-392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Biestro closed JEXL-392.
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> Enable namespace declaration based on scripts
> ----------------------------------------------
>
> Key: JEXL-392
> URL: https://issues.apache.org/jira/browse/JEXL-392
> Project: Commons JEXL
> Issue Type: Improvement
> Affects Versions: 3.2.1
> Reporter: Henri Biestro
> Assignee: Henri Biestro
> Priority: Major
> Fix For: 3.3
>
>
> WHAT:
> It is often convenient to reuse pieces of code in multiple places. This is
> easy to do with namespaces and Java classes (or objects) but impossible
> through scripts. The workaround Is to use maps that contain the various
> functions and use an object but it requires re-evaluating the script each
> time this is needed which is costly.
> Ideally, there should be a way to declare a namespace whose bound object
> would be the result of the evaluation of JEXL code.
> HOW:
> By adding a new pragma imaginatively called 'module' behaving as namespace
> declaration but whose value must be an expression (as a string) that will be
> evaluated during pragma processing.
> One important usage warning here is the idem-potence of the expression whose
> result should be stable to avoid any bizarre behaviour.
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